Cremasteric reflex

The cremasteric reflex is a reflex in males only.

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This reflex is elicited by lightly stroking the superior and medial part of the thigh in a downward direction. The normal response is a contraction of the cremaster muscle that pulls up the scrotum and testis on the side stroked.

Related Topics:
Cremaster muscle - Scrotum - Testis

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In children, this reflex may be exaggerated, and this can lead to the mistaken diagnosis of undescended testes.

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Upper and lower motor neuron disorders, as well as a spine injury of L1-L2, can cause an absence of the cremasteric reflex. It has also been reported to be absent in 100% of cases of testicular torsion, making it a useful sign in this difficult diagnosis.

Related Topics:
Neuron - Testicular torsion

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