HIST 1003 Chapter : 0dCPDcVQHr Page 05
Document Summary
Sternocleidomastoid: o=sternum, clavicle/ i=mastoid/ a=together cervical flexion, singly rotate opposite side/ n=accessory, c2-c3. Rectus abdominis: o=pubic crest & symphysis/ i=cartilage of ribs 5-7 & xiphoid/ External oblique: o=lower 8 ribs/ i=iliac crest, linea alba/ a=together compress abdomen, singly laterally flex vertebral column/ N=t7-t12 (nerves that come off of the vertebrae), iliohypogastric. Internal oblique: o=iliac crest, inguinal ligament/ i=cartilage of last 3-4 ribs/ a=together compress abdomen, singly laterally flex vertebral column/ n=t8-t12, iliohypogastric, ilioinguinal (nerve) Transversus abdominis: o=iliac crest, inguinal ligament, cartilage of last 6 ribs/ i=xiphoid, linea alba/ Diaphragm: o=xiphoid, catilage of last 6 ribs/ i=central tendon/ a=pulls central tendon increase thorax length during inspiration; when breathing it pulls on this; lengthens throax while breathing in/ n=phrenic nerve. External intercostals: o=inferior border of rib above/ i=superior border of rib below/ a=elevates ribs, increases thorax lateral & anteroposterior/ n=intercostals. Internal intercostals: o=superior border of rib below/ i=inferior border of rib above/ a=depresses ribs, decreases thorax lateral & anteroposterior/ n=intercostals.
