Question | Answer |
Pectoralis major | Fan shaped muscle of chest, anterior thorax, converges and inserts on humerus, arm adduction |
External intercostals | Between the ribs, action is to elevate the ribs for breathing, increase thoracic capacity |
Internal intercostals | Between the ribs, depress ribs for breathing, decrease thoracic capacity |
Diaphragm | Phrenic muscle, dome shaped muscle that divides thoracic cavity from abdominopelvic, origin ir in ribs, insertion is central tendon of diaphragm. Increase thoracic capacity |
Three openings in diaphragm | Vena Cava, aortic and esophagus |
Trapezius | Upper back muscle, elevates, rotates and retracts scapula |
Lattimus dorsi | lower back muscle that extends, adduct and rotates humerus |
Rectus Abdominus | Anteromeidal abdominal muscle that has horizontal tendonous intersection, flexes trunk |
Linea alba | Tendonous structure in the midline of rectus abdominus |
External obliques | Most superficial of anterolateral abdominal muscles, inserts in the linea alba, its action is to compress the abdomen |
Internal obliques | Is the intermediate depth of the anterolateral, inserts in the linea alba, compresses abdomen |
Transverse Abdominus | Deepest of anterolateral abdominal muscles inserts on the linea alba, compresses abdomen |
Psoas Major | Posterior abdominal wall muscle, flexes thigh |