front 1 obliques | back 1 compression of abdomen, flexion, and rotation of trunk |
front 2 transverse abdominis | back 2 compression of abdomen |
front 3 rectus abdominis | back 3 flexion of trunk, compression of abdominal wall |
front 4 intercostals (external and internal) | back 4 elevation and depression of ribs |
front 5 diaphragm | back 5 open thoracic cavity for lungs during inspiration |
front 6 frontalis | back 6 raises eyebrows |
front 7 occipitals | back 7 pulls scalp posteriorly |
front 8 temporalis | back 8 closes jaw, retracts mandible |
front 9 masseter | back 9 closes jaw |
front 10 zygomaticus | back 10 elevates corners of mouth |