A 53-year-old multiparous woman is scheduled to undergo elective sling surgery for treatment of stress incontinence. She has frequent loss of small amounts of urine when she coughs or laughs, despite attempts at conservative treatment. The physician inserts trocars in the obturator foramen bilaterally to make the incision and passes a mesh around the pubic bones and underneath the urethra to form a sling. During the procedure, the physician accidentally injures a nerve in the obturator foramen. The function of which of the following muscles is most likely to be affected following the procedure?
Answer B) Adductor longus
The nerve passing through the obturator foramen is the obturator nerve, which is at risk of being injured during pelvic surgeries or as a result of pelvic trauma.
The obturator nerve innervates the muscles of the medial compartment of the thigh, including the adductor longus, adductor magnus, adductor brevis, gracilis, external obturator, and, occasionally, the pectineus muscle.
It is frequently damaged during midurethral sling surgeries, as well as by pelvic ring fractures and obturator hernias.
Damage to this nerve can cause sensory deficits along the medial thigh and weakness of hip adduction.