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SPINAL REFLEXES-TENDON REFLEXES

Anatomy-General

SPINAL REFLEXES-TENDON REFLEXES

1. Tendon reflexes are the only examples of monosynaptic reflex arcs (2 neurons with 1 synapse).

2. All other reflexes are 2 or more synapses.

3. Biceps jerk (C6), triceps jerk (C7), knee jerk (L3), ankle jerk (S1).

4. Exaggeration of the tendon reflexes is due to an UMN lesion and is due to alteration in supraspinal control of the anterior horn cells which are rendered unduly excitable due to disruption of the gamma reflex loop.


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REFERENCES

1. Mcminn. (2003). Last's Anatomy. Elsevier Australia. ISBN:0729537528. Read it at Google Books - Find it at Amazon
2. Netter, F. H. (2019). Atlas of human anatomy. Philadelphia, PA: Elsevier.
3. Image: Dr. Appukutty Manickam.

Ⓒ A. Manickam 2018

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