Afferents of cremasteric reflex are present in –
Correct Answer: Genitofemoral nerve
Description: Ans. B Genitofemoral NThe cremasteric reflex is dependent upon the nerve roots L1 and L2. Genitofemoral nerve carries both the afferent & efferent components of this reflex.This reflex is elicited by stroking the superior and medial part of the thigh in a downward direction. The normal response in males is a contraction of the cremasteric muscle that pulls up the scrotum and testis on the side stroked.In children, the reflex may be over exaggerated and this can lead to the mistaken diagnosis of undescended testes.Upper and lower motor neuron disorders can cause an absence of the cremasteric reflex (a superficial reflex).The most appropriate answer to this mcq is genitofemoral nerve(GFN) onlyThe afferent limb of cremasteric reflex is carried by the femoral branch of GFN (FB- GFN) and ilioinguinal nerve(IIN) bothThere is a significant overlap between the cutaneous territories of femoral branch of GFN (FB- GFN) and ilioinguinal (IIN) nerves, especially on the medial side of the thigh and there arises the confusion!We choose FB- GFN as first and IIN in as second choice in preferential orderThe efferent is a genital branch of GFN (GB- GFN)
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