7

According to Wikipedia,

The Jendrassik maneuver is a medical maneuver wherein the patient clenches the teeth, flexes both sets of fingers into a hook-like form and interlocks those sets of fingers together.

It is generally used in sluggish knee jerk reflexes where you'd expect better ones. This method somehow elicits a better reflex. It is mysterious to me as to how clenching of the teeth and the like, can have an effect on the knee jerk. Ganong's Physiology says that the maneuver increases the gamma motor neuron discharge. But could someone explain in detail of how this happens?

migrated from biology.stackexchange.com Jul 12 '16 at 18:35

This question came from our site for biology researchers, academics, and students.

2

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3502130/

Conclusion

The findings from this study support the view that the mechanism for the JM is a reduction in presynaptic inhibition of alpha motoneurons as it is influenced by physical and not mental activity.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.