 | Term | Definition |
| |
coccygeus origin |
ischial spine and sacrospinous ligament |
| |
coccygeus insertion |
coccyx and lower sacrum |
| |
coccygeus function |
pulls coccyx forward (counternutation) and supports the floor of the abdominal cavity |
| |
coccygeus innervation |
S4-5 |
| |
levator ani origin |
pubis and ischial spine |
| |
levator ani insertion |
coccyx, rectum, and levator ani on the other side |
| |
levator ani function |
supports the weight of the abdominal contents |
| |
levator ani innervation |
S4 |
| |
external anal sphincter location |
encircles the anus |
| |
external anal sphincter function |
voluntary control of defecation |
| |
external anal sphincter innervation |
pudendal nerve (S2-4) |
| |
sphincter urethrae location |
encircles the urethra |
| |
sphincter urethrae function |
voluntary control of urination |
| |
sphincter urethrae innervation |
pudendal nerve (S2-4) |
| |
iliopsoas origin |
psoas major; T12-L5 vertbra and intervertebral discs |
| |
iliopsoas insertion |
lesser trochanter of femur |
| |
iliopsoas function |
hip flexion |
| |
iliopsoas innervation |
femoral nerve (L2-3) |
