1. Compare the average reflex times of the Achilles and patellar tendon reflexes. What factors contribute to the difference between the two reflex times? 2. Is the patellar reflex inhibited or enhanced by voluntary muscle activity in the quadriceps? Speculate on the mechanism of inhibition or enhancement. 3. Is the patellar reflex retarded or facilitated during the Jendrassik's Maneuver (voluntary muscle activity in another part of the body)? Speculate on the mechanism of retardation or facilitation. 4. Besides excitatory inputs from stretch receptors, what synaptic inputs might influence the activity of spinal motor neurons?
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The average reflex times of the Achilles and patellar tendon reflexes can vary based on several factors, including age, sex, and overall health. Generally, the patellar reflex is slightly faster than the Achilles reflex. This is because the patellar reflex Show more…
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Is the patellar reflex inhibited or enhanced by voluntary muscle activity in the quadriceps? Speculate on the mechanism of inhibition or enhancement.
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Which reflexes are the fastest? 1) Achilles - medium, 2) Patellar - relaxed, 3) Quad Crossed extensor. Order them from fastest to slowest. Is the patellar reflex (relaxed) inhibited or enhanced by voluntary muscle activity in the quadriceps? Use reflex time. Is the patellar reflex (relaxed) inhibited or facilitated by the Jendrassik's Maneuver? Use reflex time. What might it mean if a subject is missing the reflex or has a slower than normal reflex? (Not a data question)
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