The cremaster muscle covering the spermatic cord is derived from which abdominal wall layer?

• A External oblique aponeurosis
• B Transversalis fascia
• C Transversus abdominis muscle
• D Internal oblique muscle ✓

Explanation

As the testis descends, each abdominal wall layer contributes a covering to the cord: external oblique gives the external spermatic fascia, internal oblique gives the cremaster muscle and fascia, and transversalis fascia gives the internal spermatic fascia. Transversus abdominis contributes nothing. The cremaster is innervated by the genital branch of the genitofemoral nerve, mediating the cremasteric reflex.

Reference: Gray's Anatomy for Students, 4th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

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