Sometimes, when it is difficult to initiate a knee-jerk reflex by tapping the patellar tendon, a patient will be asked to voluntarily make a fist. Then the reflex will be easily evoked. What does this illustrate about the relation between voluntary and involuntary reflex movement?
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With regard to the Knee Jerk Reflex: What is the physiological function of this reflex? Explain how this reflex may be important during walking, if you are clumsy like me and did not notice a hole in the sidewalk and stepped into it. What is the role of reciprocal inhibition? How would the reflex be affected if reciprocal inhibition failed? Describe the effects on the reflex of severing each structure involved in the reflex, considering one structure at a time.
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If a reflex is a limited circuit within the somatic system, why do physical and neurological exams include them to test the health of an individual?
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