What is the plantar reflex? How is it different from deep tendon reflexes? When is presence of the sign normal versus abnormal? When is the absence of the sign normal versus abnormal? What nerves are we testing?

What is the plantar reflex? How is it different from deep tendon reflexes? When is presence of the sign normal versus abnormal? When is the absence of the sign normal versus abnormal? What nerves are we testing?

Principles Of Radiographic Imaging: An Art And A Science

6th Edition

ISBN:9781337711067

Author:Richard R. Carlton, Arlene M. Adler, Vesna Balac

Publisher:Richard R. Carlton, Arlene M. Adler, Vesna Balac

Chapter28: Spatial Resolution

Section: Chapter Questions

Problem 7RQ

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Question

What is the plantar reflex?
How is it different from deep tendon reflexes?
When is presence of the sign normal versus abnormal?
When is the absence of the sign normal versus abnormal?
What nerves are we testing?

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A tap on the patellar tendon at the knee joint is used to test the knee-jerk reflex. All of the followings are correct, except ---------------------. The reflex starts with the 1a sensory neurons of the muscle spindle There is an excitatory stimulus to the motor pool of the extensor muscle There is a stimulation of the excitatory interneuron of the flexor muscle Excitation of the extensor muscle fibers causes the knee extension Muscle contraction depends on coordination between motor pools of antagonistic muscles
Do you think the patellar reflex would be inhibited or enhanced by actively contracting the quadriceps muscle group? With an understanding of how muscle spindle fibers work, explain how active contraction of a muscle might affect the myotactic reflex. [hint: try to elicit a knee jerk reflex when someone is doing a leg lift]
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In the patellar tendon reflex, what is the name of the receptors being struck by the reflex hammer?
Why is the crossed extensor reflex classified as a contralateral reflex arc?
Which of the following is true of cross-extensor reflexes? in the leg that sensed the pain, the flexor relaxes in the leg that sensed the pain, the extensor contracts in the opposite leg, the extensor is activated in the opposite leg the flexor is activated
Select the best answer or answers from the choices given: A reflex that causes reciprocal activation of the antagonist muscle is the (a) crossed-extensor, (b) flexor, (c) tendon, (d) muscle stretch.
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Bell’s palsy is a disorder of the facial nerve involving temporary or permanent paralysis of the muscles of facial expression. Which muscles of the head and face would be unaffected by Bell’s palsy?