Cremaster Muscle
Origin-- Superficial fibers – originate from middle 1/3rd of upper surface of inguinal ligament Deep fibers – originate from pubic crest and conjoint tendon Insertion Superficial fibers extend along spermatic cord and reach scrotum Superficial and deep fibers – connected with each other around spermatic cord and upper part of scrotum In females, few fibers of cremaster muscle accompany round ligament of uterus, Innervation---Genital branch of genitofemoral nerve (L1–L2) Mostly these fibers carry sympathetic innervation Cremaster muscle – not under voluntary control, Actions--- Pulls testis upward toward superficial inguinal ring helps in closing superficial inguinal ring and controlling temperature of testis