 | Term | Definition |
| |
origin of coccygeus |
ischial spine and sacrospinous ligament |
| |
insertion of coccygeus |
coccyx and lower sacrum |
| |
function of coccygeus |
pulls the coccyx forward (counternutation) and supports the floor of the abdominal cavity |
| |
innervation of coccygeus |
S4-5 |
| |
origin of levator ani |
pubis and ischial spine |
| |
insertion of levator ani |
coccyx, rectum, and levator ani on the other side |
| |
function of the levator ani |
supports the weight of the abdominal contents |
| |
innervation of levator ani |
S4 |
| |
location of external anal sphincter |
encircles the anus |
| |
function of external sphincter |
voluntary control of defecation (bowel movement) |
| |
location of sphincter urethrae |
encircles the urethra |
| |
function of sphincter urethrae |
voluntary control of urination |
| |
innervation of external anal sphincter and sphincter urethrae |
pudenal nerve (S2-4) |
