Cremasteric Reflex

Cremasteric Reflex

The cremasteric reflex is a superficial or cutaneous reflex consisting of contraction of the cremaster muscle causing elevation of the testicle, following stimulation of the skin of the upper inner aspect of the thigh from above downwards (i.e., the L1, L2 dermatomes, via the ilioinguinal and genitofemoral nerves).

The cremasteric reflex is lost when the corticospinal pathways are damaged above T12, or following lesions of the genitofemoral nerve. It may also be absent in elderly men, or with local pathology, such as hydrocele, varicocele, orchitis or epididymitis.


Cross References

Abdominal reflexes; Reflexes