Answered: Suppose a person has spinal cord damage…

Suppose a person has spinal cord damage at the cervical level. would this stop the knee-jerk reflex? How would it affect the plantar reflex? Explain

Biomedical Instrumentation Systems

1st Edition

ISBN:9781133478294

Author:Chatterjee

Publisher:Chatterjee

Chapter12: Electroencephalography And Emg Instrumentation

Section: Chapter Questions

Problem 7Q

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Suppose a person has spinal cord damage at the cervical level. would this stop the knee-jerk reflex? How would it affect the plantar reflex? Explain

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The biceps-jerk reflex is carried out by motor neurons that exit the spinal cord in the fifth spinal nerve (C5). The triceps-jerk reflex uses motor neurons in the seventh spinal nerve (C7). Describe how these reflexes might be tested to help pinpoint damage in a patient with a neck injury.
a) Describe the processes involved in the knee-jerk reflex and explainwhy it is called a ‘monosynaptic’ reflex.b) While crawling across the floor a child accidentally places her righthand onto a piece of broken glass. How will the flexor muscles of herleft arm respond? What happens to the rest of her body?
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Is the brain necessary for spinal reflex activity to occur? Why or why not? List in correct sequence the major components of a spinal reflex arc.
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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