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Genital branch of genitofemoral nerve

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TA
  
A14.2.07.009

Dorlands/Elsevier
  
r_02/12690192

FMA
  
20560

Genital branch of genitofemoral nerve

Innervates
  
Cremaster and dartos muscle

Latin
  
Ramus genitalis nervi genitofemoralis

The genital branch of the genitofemoral nerve, also known as the external spermatic nerve in males, is a nerve in the abdomen that arises from the genitofemoral nerve. The genital branch supplies the cremaster muscle and anterior scrotal skin in males, and the skin of the mons pubis and labia majora in females.

Contents

Structure

The genital branch of the genitofemoral nerve arises from the ventral primary divisions of L1-L2 spinal nerve roots. It passes outward on the psoas major muscle, and pierces the fascia transversalis, or passes through the deep inguinal ring. It then descends within the spermatic cord. In males, it passes through to the scrotum, where it supplies the cremaster, dartos muscle and gives a few filaments to the skin of the scrotum. In females, it accompanies the round ligament of the uterus, where is terminates as the nerve supplying skin to the labia majora and mons pubis.

Function

The genital branch of the genitofemoral nerve is responsible for the motor portion of the cremasteric reflex, which describes contraction of the cremasteric muscle when the skin of the superior medial part of the thigh is touched.

References

Genital branch of genitofemoral nerve Wikipedia


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