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him, the Greeks probably wouldn't have been able to defeat the Reflexes by Janet Chen Daniel. Achilles. The sensory neuron detects stimuli and sends a signal towards the CNS. Last accessed January 22, 2020. The ankle jerk reflex, also known as the Achilles reflex, occurs when the Achilles tendon is tapped while the foot is dorsiflexed.It is a type of stretch reflex that tests the function of the gastrocnemius muscle and the nerve that supplies it. The gastrocnemius muscle has two heads that crisscross the knee joint. ii. The causes include diseases such as diabetes, alcoholism, amyloidosis, uremia; vitamin deficiencies such as pellagra, beriberi, pernicious anemia; remote cancer; toxins including lead, arsenic, isoniazid, vincristine, diphenylhydantoin. The reflex can take one of two forms. [2] Physiologic derangements caused by diabetes mellitus, hypothyroidism, uremia, vitamin or electrolyte deficiencies, and toxins such as lead or arsenic can commonly present with hyporeflexia. A receptor, and independent sensory cell, or an ending of a sensory neuron, reacts to a stimulus (e.g., a stretch receptor). First of all, stimuli are sounds, feelings, and sights that activate your reflexes. Intrafusal fibers are not contractile; instead, they respond to tension by depolarizing a sensory neuron. To be more precise, an EMG measures fluctuations in the electrical activity of muscles due to muscle cell action potentials. The gastrocnemius muscle has two heads that crisscross the knee joint. Why is the Achilles reflex important in walking? The stimulus (the hammer) results in a signal being sent via a sensory nerve to the spinal cord. Locate the heel of the foot and dorsiflex the foot. Last accessed January 22, 2020. Surface electromyography (EMG) measures the electrical activity in a muscle by placing recording electrodes on the skin over the muscle. Being a deep tendon reflex, it is monosynaptic. to Achilles in martial prowess. Ask the subject to look away or close his or her eyes and kick his or her leg in response to hearing the noise of the hammer when it taps the bench top. What is the answer punchline algebra 15.1 why dose a chicken coop have only two doors? No comments. Note the result in meters or mm. It connects the two muscle groups (collectively, triceps surae) to the calcaneus. What movement does the Achilles tendon do? There should be a reflex contraction of the gastrocnemius muscle (plantar flexion). The Achilles tendon is the largest and strongest tendon in the body. With proper rest and activity, many Achilles tendon injuries heal within three to six months. An appropriate balance of excitatory and inhibitory regulation from the central nervous system. Why is the Achilles reflex important in walking? The plantar reflex is a reflex elicited when the sole of the foot is stimulated with a blunt instrument. This is because of the spasticity caused by the UMN type of injury causing hyperreflexia and clonus. Use an alcohol swab to clean and abrade three regions on the lower portion of the left leg for electrode attachment. Measure the distance between the belly of the subjects gastrocnemius (calf) muscle (black electrode) and the site of the sensory-motor synapse in the spinal cord. The Patellar Reflex and the Achilles Reflex The result is the contraction of the quadriceps muscle, causing knee extension. Now, normally your muscles contract when stimulated by alpha motor neurons. Sources: f. A person touches a stove, withdraws his or her hand, and then yells. Simultaneously, the other toes fan out away from each other. Providers treat most Achilles tendon issues nonsurgically, though tendon rupture often requires surgery. What causes absent Achilles reflex? walking & producing saliva when you smell food. The Achilles reflex originates in the S1 and S2 nerve roots. Reflexes require a minimum of two neurons, a sensory neuron (input) and a motor neuron (output) (see Figure 1). Grade 4 ankle hyperreflexia is called ankle clonus. If you continue to use this site we will assume that you are happy with it. The reflex is processed at this level and does not progress to the brain. To test reflex facilitation, repeat this exercise on the same subject while the subject is performing the Jendrassik Maneuver (below). The coordination of motor activity in antagonistic muscles may also be studied. When reflex responses are absent this could be a clue that the spinal cord, nerve root, peripheral nerve, or muscle has been damaged. This causes the efferent neuron to return a signal to the quadriceps muscle to contract and lift the lower leg. American Academy of Orthopaedic Surgeons. Patellar reflex functions to prevent overstretching of the muscle and compensate with contraction. Each tendon reflex is subserved by specific spinal cord segments: Reflex. Redmayne knows she is living through a golden era for Australia, but also the dawn of something greater for women's sport. Some other causes of clonus are, https://en.wikipedia.org/w/index.php?title=Ankle_jerk_reflex&oldid=1080651965, This page was last edited on 2 April 2022, at 15:30. In healthy adults, the plantar reflex causes a downward response of the hallux (flexion). The standard response is automatic, causing the toes to flex down toward the pressure and stimulation. What did the Nazis begin using gas chambers instead of mobile killing units and shooting squads after a while. Or you could touch a hot object (the stimulus) and jerk your hand back or drop it (the reflex[es]). Remove the plastic disk from a disposable electrode and apply it to one of the abraded areas. If this was the case, walking would be a terribly difficult task, because you'd essentially be see-sawing with every step you take. Explain Like I'm Five is the best forum and archive on the internet for layperson-friendly explanations. The Achilles tendon (AT) has the capacity to store and release elastic energy during walking, contributing to metabolic energy savings. Intrafusal fibers respond to tension in the tissue by depolarizing a sensory neuron. Make a. When these nerves are damaged, they may send pain signals to the brain even if the fracture healing . Conduction velocity cannot be measured directly and must be calculated using path length and reaction time data. The doctor will begin the test by grabbing onto the foot and moving it to the dorsi-flexion position (as mentioned above). When a muscle is stretched, this spindle senses it and sends the information to the second in command; the spinal cord, which immediately sends instructions back to the muscle to contract and prevent injury from occurring. Don't Panic! This works pretty well, but it's kind of like an all or none system. Reflex actions are involuntary and immediate reactions to a stimulus.Two examples are:Pulling your hand away from a hot object (this is a spinal reflex action)The 'knee jerk' - when the tendon just below the knee is tapped, it causes the thigh muscle to suddenly contract and the foot kicks forward. While the foot is dorsiflex, tap with the reflex hammer briskly on the achilles tendon. There are three different phases in the walking cycle, stance, push off and swing. Achilles tendon disorders include: Your healthcare provider first does a physical exam to check for Achilles tendinopathy. There has been quite a lot of research involving the use of the Achilles reflex. All this happens while the person is becoming aware of the burning sensation. To better consider the events that result in the sensation of muscle stretch, we must first define muscle fiber types. Cleveland Clinic is a non-profit academic medical center. The knee reflex or patellar reflex is responsible for the knee to extend, which helps maintain posture, balance and step forward. Why is Achilles reflex important in walking? American College of Foot and Ankle Surgeons (ACFAS). The mathematical function, Very important: adjust the zoom on the waves, so that you can, Once the cursors are placed in the correct positions for determining the reflex time, record the value for T2-T1 and record this time, Once the reflex time in the first trial is measured and recorded, move to the data from the, Record the mean reflex time for the Achilles reflex in the Data Table in your, Conduction velocity cannot be measured directly and must be calculated. How to Assess the Achilles Deep Tendon Reflex. In the Achilles reflex, the hammer taps the Achilles tendon while the foot is dorsiflexed, and the foot, in response, should jerk toward the plantar surface. Definition 1)Ciliospinal Reflex 2)Pupillary Light Reflex. Imagine a tiny stick which has a little bag in the middle, sitting inside every voluntary muscle under your control. When comparing reflexes from different sites of the body, the locations of the corresponding nerve roots along the spinal cord should be considered in order to determine possible sites of injuries and differences in reflex path lengths. So you have a second set of motor neurons, called gamma motor neurons, that work to keep the muscle spindle stretched, and ensure a continuous flow of motor innervation to the muscles to keep the muscle contracted. Facilitation (reinforcement) may enhance the relative strength (relative amplitude) and/or speed (reaction time, in milliseconds) of a reflex response due to maximal isometric contraction of muscles in a remote part of the body for example, by clenching the jaw or locking the fingers of the two hands and pulling (the Jendrassik maneuver). Is switch off your brain. Achilles Reflex definition: A reflex bending of the foot resulting from contraction of the calf muscles when the Achilles tendon is sharply struck. Reflex amplitude (strength) and speed with and without reflex reinforcement. Passmore SR, Bruno PA. Anatomically remote muscle contraction facilitates patellar tendon reflex reinforcement while mental activity does not: a within-participants experimental trial. In this lab, students will determine the response time, conduction velocity (speed), and amplitude (strength) of two stretch reflexes: the Achilles reflex at the ankle and the patellar (knee-jerk) reflex. The Achilles reflex originates in the S1 and S2 nerve roots. The Achilles reflex originates in the S1 and S2 nerve roots. To better consider the events that result in the sensation of muscle stretch, we must first define muscle fiber types. Locate the heel of the foot and dorsiflex the foot. Achilles tendon reflex. Why are the knee jerk and Achilles reflex important for walking? Sensory neurons transmit information from sensory receptors to the central nervous system (CNS) Relay neurons (interneurons) transmit information within the CNS as part of the decision-making process. I've tried googling it but for the life of me can't find the answer. There are no real risks associated with this test and other than a hammer there is no expensive equipment to be used, and best of all is that it involves minimal discomfort to the patient. In this lab, two monosynaptic reflexes in a human subject will be studied: the Achilles tendon reflex, and the patellar tendon (knee-jerk) reflex. (1 mark), A person touches a stove, withdraws his or her hand, and then yells. It's important to note that most Romans knew Greek as it was the Press question mark to learn the rest of the keyboard shortcuts. The paratenon layer provides blood flow to the tendon and lubricates its movement. Graduated from ENSAT (national agronomic school of Toulouse) in plant sciences in 2018, I pursued a CIFRE doctorate under contract with SunAgri and INRAE in Avignon between 2019 and 2022. It's important to note that most Romans knew Greek as it was the. Adjust the subjects foot so the joint is in neutral position (see photo, below). (2021). What is the application of a cascade control system? In particular, the Achilles tendon is a long tendon that is important for storing and releasing elastic energy during walking, and as such, plays an important role in metabolic energy saving, as it actually spares the muscle from performing a large part of the work (3). Find the point on the patellar tendon that causes the greatest response from the quadriceps muscle. Taylor Reflex Hammers Designed to test joint reflexes or bone fractures in the joints. 9500 Euclid Avenue, Cleveland, Ohio 44195 |, Important Updates + Notice of Vendor Data Event, (https://orthoinfo.aaos.org/en/diseases--conditions/achilles-tendinitis/), (https://www.foothealthfacts.org/conditions/achilles-tendon-disorders). In the Achilles reflex, the hammer taps the Achilles tendon while the foot is dorsiflexed, and the foot, in response, should jerk toward the plantar surface. The EMG displays the electrical potentials generated by the muscle cells on a computer screen as a series of peaks and troughs defining the EMG wave (Fig. Stretch reflexes are protective reflexes that ensue to avoid damage due to over-stretching a muscle. E xplain why the knee-jerk and achilles reflexes are important in walking? Objective: To determine the amplitude and conduction velocity of the patellar tendon reflex arc under different conditions. Instruct the subject to sit on a tall stool or tabletop so that the subjects thighs are supported by the top of the stool and his or her calves hang freely (feet off the floor). In this analysis, you will perform measurements for the patellar reflex, facilitated patellar reflex (Jendrassik), and the voluntary knee jerk conditions. Repeat the measurement of T2-T1 on the data for all the 10 reflex tap trials by moving the cursors. Increase the duration and intensity of your activity at a gradual pace. We're not looking at conscious effort here. Multiply this measurement by 2 to determine the total length of the reflex path. The Achilles tendon starts in the middle of your calf and extends down to your heel. why is the achilles reflex important in walking. The effect of pre-existing tension in the effector muscle, or motor activity in other muscle groups, upon reflex responses will be measured. The reflexes help tell you if the neurons are firing with enough energy or not (In this case though, the motor neurons are also regulated by other neurons outside this arc. The reflex actions are all purposeful and protective in nature. The Achilles reflex is a monosynaptic stretch reflex similar to the patellar reflex. Many reflex actions which protect the body from damage. Different results when implementing the JM may be due to differences in the physiology of healthy experimental subjects versus patients (in the clinical setting) who are being assessed for nerve problems. A stimulus can be bird tweeting during school in your classroom, and you get distracted by it and look. Give the subjects Achilles tendon smart tap to elicit the stretch reflex. Information on this web site is provided for informational purposes only and is not a substitute for professional medical advice. In extreme activities, such as sprinting, it can be subjected to forces as high as 13.0 times a person's weight. Health And Nutrition Tips Home | Site Map | Terms of Use | Privacy Policy Using the arrow keys on your key board helps to move the cursor more precisely when you are very close to wave peaks. A Mixed Course-Based Research Approach to Human Physiology, https://creativecommons.org/licenses/by/3.0/us/, https://creativecommons.org/licenses/by/1.0/, http://csmbio.csm.jmu.edu/biology/danie2jc/reflex.htm, https://www.dartmouth.edu/~dons/part_1/chapter_8.html, https://iastate.pressbooks.pub/curehumanphysiology/, Creative Commons Attribution-ShareAlike 4.0 International License. Turn on the iWorx hardware with the switch on the back of the unit. Place one hand on the patella (kneecap), and use the other hand to tap the patellar tendon with the reflex hammer. Your provider looks for Achilles tendon pain when they move or press your tendon. This causes rapid, brief stimulation of dynamic stretch receptors. ANSWER. The Achilles tendon, which connects the calf muscles to the heel, is the thickest and strongest tendon in the body. A reflex arc refers to the neural pathway that a nerve impulse follows. To be more precise, an EMG measures fluctuations in the electrical activity of muscles due to muscle cell action potentials. The Achilles reflex is a form of stretch reflex in which the foot jerks towards its plantar surface when the Achilles tendon is tapped while the foot is dorsiflexed. The Achilles reflex originates in the S1 and S2 nerve roots. The Achilles reflex is a monosynaptic stretch reflex similar to the patellar reflex. Checking the Achilles reflex is a method used by medical professionals to make a diagnosis because it allows them to check for nerve damage or damage to neurons on the spinal cord. Lower motor neuron lesions (eg affecting the anterior horn cell, spinal root or peripheral nerve) depress reflexes: upper motor neuron lesions increase the reflexes. Tapping the patellar tendon pulls and stretches the quadriceps muscle and causes the sensory receptor of the muscle, called a musclespindle fiber, to send a signal along the afferent neuron to the spinal cord (Figure 2). Reflexes require a minimum of two neurons, a sensory neuron (input) and a motor neuron (output) (see Figure 1). Objective: To determine the conduction velocity of the Achilles tendon reflex arc. This action resists the initial stretch and is a classic example of negative feedback. The reflex is monosynaptic, two-neuron, reflex arc. The patellar and Achilles reflexes are of great significance in walking. The velocity of a reflex informs us about the health of the receptors, neurons, and muscles involved in a reflex and can help to diagnose neuromuscular damage or disease. Suppose you're given extra weight, the muscle spindles in your biceps receive this increase in load in the form of an increased stretch. Second of all, people react to stimuli because it, again, is your reflexes kicking in. In this lab, two monosynaptic reflexes in a human subject will be studied: the Achilles tendon reflex, and the patellar tendon (knee-jerk) reflex. Thickening or small bumps (signs of tendinosis). A Mixed Course-Based Research Approach to Human Physiology. What stimulates tendon reflexes? The Achilles tendon (AT) has the capacity to store and release elastic energy during walking, contributing to metabolic energy savings. Stretch reflexes occur in response to the activation of special sensory receptors in the muscle called muscle spindles or stretch receptors.. The most familiar reflex is the knee jerk, when a healthcare provider taps on the tendon below your knee with a reflex hammer and that leg kicks out. A signal travels through nerve connections between the front of leg muscles and your spinal cord (because this is a reflex) and the back of leg muscles to allow you to walk without thinking about walking. Look at the Function Table that is above the display of the EMG channel. The knee jerk and Achilles reflex are important in walking because they are needed when walking. The coordination of motor activity in antagonistic muscles may also be studied. The JM likely amplifies reflexes by decreasing inhibitory signals to the alpha motor neurons that are responsible for muscle contraction at the neuromuscular junction (NMJ) (Passmore & Bruno 2012). Different types of reflexes can be signs of serious disorders related to the nervous system. The Achilles reflex checks if the S1 and S2 nerve roots are intact and could be indicative of sciatic nerve pathology. Beyond simple reflexes with integrating centers in the spinal cord, more complex reflexes have integration centers in the brainstem or even in the cerebrum. Response time, path length, and conduction velocity of the patellar and Achilles reflexes. In this lab, students will record electromyograms (EMGs) for the fibers in a muscle, and use them to determine the time between the stretch of a tendon and the arrival of a motor impulse at the muscle. It is also a stretch reflex. Alternate high-impact with low-impact activities. All rights reserved. Evaluation and Synthesis. Real Estate Software Dubai > blog > why is the achilles reflex important in walking A reflex arc refers to the neural pathway that a nerve impulse follows. To help reduce your risk of Achilles tendon problems: If you still experience pain and symptoms three to six months after you start treatment, you should talk to a healthcare provider. A reflex that protects the body from injury, as this one does, is called a nociceptive reflex. The ankle reflex is elicited by holding the relaxed foot with one hand and striking the Achilles tendon with the hammer and noting plantar flexion. The Achilles reflex is a monosynaptic stretch reflex similar to the patellar reflex. Advertising on our site helps support our mission. Conditions that impact the Achilles tendon include bursitis, tendinitis, tendinosis and tendon rupture. This continuous flow is called muscle tone, and comes from synergy of gamma neurons keeping the muscle spindle slightly stretched, which in turn causes the alpha neurons to fire off and contract the muscle. A reflex is an involuntary (automatic) response to stimulus that quickly returns the body to homeostasis. When comparing reflexes from different sites of the body, the locations of the corresponding nerve roots along the spinal cord should be considered in order to determine possible sites of injuries and differences in reflex path lengths. First thing we got to do. A teacher walks into the Classroom and says If only Yesterday was Tomorrow Today would have been a Saturday Which Day did the Teacher make this Statement? That's the main thing to keep in mind. This action is very significant in human locomotion and propulsion responsible for actions such as walking, running and even jumping. Different results when implementing the JM may be due to differences in the physiology of healthy experimental subjects versus patients (in the clinical setting) who are being assessed for nerve problems. The Achilles reflex is a monosynaptic stretch reflex similar to the patellar reflex. See Page 1. It is also the case that there are certain medical conditions that will mean the reflex might be absent and these include; alcoholism, chronic diabetes, subarachnoid . Course Hero is not sponsored or endorsed by any college or university. In parallel, an inhibitory impulse is sent from the spinal cord to cause relaxation of the hamstring muscles, via a polysynaptic pathway. Assume synaptic transmission in this pathway takes about 0.5 msec (0.0005 sec), and calculate the conduction velocity in the nerves composing this reflex pathway by the equation: Record the conduction velocity for the Achilles reflex in your Lab Report. Once the reflex times in all ten trials have been measured and recorded on your worksheet, discard the longest and shortest times from the data set, and determine the average of the eight remaining reflex times. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Hold the foot lightly without applying resistance. Examples are shivering in response to low core body temperature; or withdrawing your hand from a hot stove when temperature and pain receptors in your hand register the stimulus. Thanks. The EMG produces an electromyogram, which records both the relative amplitude (relative strength) and timing of muscle contractions. Reflexes by Janet Chen Daniel. The quadriceps is an extensor muscle: when it contracts it extends the angle of the knee joint by raising the lower leg from a bent position. Neurosyphilis is an infection of the spinal cord and brain; it is caused because a person is suffering from untreated syphilis. Use an alcohol swab to clean and abrade three regions on the lower portion of the left leg for electrode attachment. Accueil; Services; Ralisations; Annie Moussin; Mdias; 514-569-8476 There are 5 somatic reflexes, stretch (spinal), crossed extensor (spinal), superficial cord (spinal), corneal (cranial), and gag (cranial).Involuntary automatic responses to sensory stimulation, for example, the knee-jerk reaction when tapped.Note: Reflexes, such as the contraction / dilation of the pupil, salivation when hungry are all controlled by autonomic reflexes. Voluntary vs reflex muscle movement reaction times. The soleus muscle flexes your foot to point your toes downward. A knot on the back of the leg or bruising over the tendon (signs of a tendon rupture). counterpart. The primary purpose of the patellar reflex the stretch reflex of the quadriceps femoris muscle is to prevent excessive stretching of the quadriceps. Introduction to the Human Physiology Laboratory & Learning Models, Safety and Compliance in the Human Physiology Laboratory, Scientific Methods and Human Subjects Research, Conducting Background Research in the Sciences, Clinical Techniques: Assessment of Vital Signs, Introduction to Data Acquisition in Human Physiology, Molecules of Life: The Central Dogma and RNA Vaccines, Properties of Blood as a Buffer and Blood Glucose, Body Temperature Homeostasis: Cold Pressor Test, Clinical Techniques: The Neurological Assessment, Assessment of Patellar and Achilles Reflexes, Remote Muscular Control: The Human-Human Interface. Additionally, neural activity at other sites in the body may influence a reflex arc. Achilles Reflex- The Achilles, or ankle-jerk, reflex assesses the first two sacral segments of the spinal cord. There is repetitive ankle dorsiflexion and plantarflexion on passive dorsiflexion of the foot by the examiner till the force applied by the examiner is withdrawn. This action resists the initial stretch and is a classic example of negative feedback. The sensory neuron synapses with a motor neuron, which innervates an effector tissue, such as skeletal muscle in order to pull away from painful stimuli. Get useful, helpful and relevant health + wellness information. Patellar reflex and Achillis reflex are stretch reflexes. This stretch is detected by a specialized sensory system in every muscle, called the muscle spindle. Reflex testing is of clinical value. Using the arrow keys on your key board helps to move the cursor more precisely when you are very close to wave peaks. This muscle flexes your knee and ankle. This is the simplest reflex arc, and the integrating center is in the spinal cord. This movement allows us to stand on our toes when walking, running, or jumping. The patellar reflex is a deep tendon reflex, mediated by the spinal nerves from the levels L2, L3, and L4 in the spinal cord, predominantly in the root L4. A healed broken bone may still hurt for a variety of reasons, even after it has been set and healed properly. The subject should interlock the hands using the cup-shaped grip, attempting to pull the hands apart, DURING reflex recording. This is a very life threatening situation that can also show up in the reflexes. Trunk and leg muscles respond to support the body in its sudden change of position, and the head and eyes turn to look at the cause of the injury. A positive result would be the jerking of the foot towards its plantar surface.Being a deep tendon reflex, it is monosynaptic. Because Achilles was a mortal, he had no existing Roman Some measurements we will make in the lab experiments: Can you think of some hypotheses for the experiments in this weeks laboratory? Problems involving the Achilles tendon are called Achilles tendinopathy. Say you're standing up and start to lean towards your right side due to gravity. Wear well-fitting shoes designed for the activity youre doing. When they are intact, integrity of the following is confirmed: cutaneous innervation, motor supply, and cortical input to the corresponding spinal segment. The Achilles reflex causes the movement of the foot to next step. Multiply this measurement by 2 to determine the total length of the reflex path. A stretch reflex is a type of muscle reflex, which protects muscle against increases in length that can tear and damage muscle fibers. When the spinal cord and brain is infected it can affect the tendon reflex. A subarachnoid hemorrhage is when blood enters the subarachnoid space which surrounds the brain. This reflex is usually absent in disk herniations at the L5S1 level. Reflex amplitude (strength) and speed with and without reflex reinforcement. Though the Achilles tendon is strong, people frequently experience Achilles tendon injuries. Checking the Achilles reflex is a method used by medical professionals to make a diagnosis because it allows them to check for nerve damage or damage to neurons on the spinal cord. In a nutshell, this is the muscle spindle reflex. She feels connected to both of those things and yet, as she counts her . Ask the subject to look away or close his or her eyes and kick his or her leg in response to hearing the noise of the hammer when it taps the bench top. Voluntary vs reflex muscle movement reaction times. Press J to jump to the feed. Why is the Achilles reflex important in walking? It is classically delayed in hypothyroidism. Ames, IA: Iowa State University Digital Press. The reason for this is that it is a good method of providing data when monitoring the performance of individuals with certain medical conditions who may be taking part in research. Facilitation (reinforcement) may enhance the relative strength (relative amplitude) and/or speed (reaction time, in milliseconds) of a reflex response due to maximal isometric contraction of muscles in a remote part of the body for example, by clenching the jaw or locking the fingers of the two hands and pulling (the Jendrassik maneuver). Without Make a. In a normal test, your knee will extend and lift your foot a little. Wow! Conditions include bursitis, tendinitis, tendinosis and tendon rupture. Now have the patient dangle the foot while you dorsiflex it. The Jendrassik maneuver (JM) is a special method for reinforcement that is applied in the clinical setting when it is difficult to initiate a reflex in a patient. All this happens while the person is becoming aware of the burning sensation. Because Achilles was a mortal, he had no existing Roman counterpart. Turn on the iWorx hardware with the switch on the back of the unit. The achilles reflex is important in walking because when one pushes off of the ground , the achilles tendon needs to be able to move one 's foot around in order to maintain balance and steadiness during these movements .