Last mucles Flashcards
Levator ani Insertion
Coccyx Anococcygeal ligament perineal body walls of prostate or vagina anal canal rectum
Levator Ani Origin
Body of pelvis
tendinous arch of levator ani
Ischial spine
Levator ani Innervation
Nerve to levator ani (branch of S4)
Inferior anal nerve
Levator ani action
hlps support pelvic viscera
resist increases in intraabdominal pressure
Coccygeus origin
Ischial spine
Insertion of coccygeus
inferior end of sacrum and coccyx
innervation of coccygeus
branches of S4 and S5
action of Coccygeus
forms small part of pelvic diagram that supports the pelvic viscera
Obturator Internus origin
Pelvic surface of illium and ischium and obturator membrane
Obturator internus insertion
greater trochanter of femur
obturator internus innervation
Nerve to obturator internus L5 S1 S2
Action of Obturator Internus
laterally rotates hip joint
assisting in holding the head of femur in the acetabulum
Piriformis origin
pelvic surfaces of 2nd-4th sacra segment
superior margin of greater sciatic notch
sacrotuberous ligament
Insertion of Piriformis
Greater trochanter
Piriformis innervation
Anterior rami of s1-s2
Action of Piriformis
llaterally rotates hip joint
abducts hip joint
holds head of femur in the aced
