muscles of the thorax, abdomen, & pelvis - R.J.
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| Pectoralis Major | -sternum; clavicle; cartilage of ribs 1-7; aponeurosis of external oblique | Humerus | -flexes, adducts rotates the arm medially. | thorax
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| Pectoralis Minor | Stabilizes scapular for arm movements; elevates ribs in inspiration. | thorax
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| External intercostals | -rib-superior | -rib-inferior | -elevates ribs; inhalation | thorax
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| Internal intercostals | -rib-inferior | -rib-superior | -depresses ribs; expiration | thorax
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| Diaphragm | -sternum; costal cartilage 7-12; Lumbar vertebrae | Central tendon | -Increases volume of thoracic cavity (respiration) -increase intraabdominal pressure (micturition, defecation, childbirth) | thorax
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| External oblique | -lower 8 ribs (5-12) | -Iliac crest -linea alba | -lateral rotation & lateral flexion of the trunk | anterior abdomen
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| Internal oblique | Ilium | -10-12th ribs | -lateral rotation & lateral flexion of trunk | anterior abdomen
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| Transverse oblique | 7-12th costal cartilage; ilium | -sternum; pubis | -compresses abdomen | anterior abdomen
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| Rectus abdominis | -pubis | -sternum; inferior ribs | -flexes trunk at the waist; compresses abdomen | anterior abdomen
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| Psoas major & iliacus | -flexes thigh (hip joint) & flexes Lumbar vertebral column (trunk) | posterior abdomen
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| Quadratus lumborum | -flexes lumbar region laterally -fixes ribs 11 & 12 in forced expiration | posterior abdomen
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| DELTOID | CLAVICLE | HUMERUS; SCAPULA | PRIMEMOVER arm abduction, flexion and extension of arm; medial and lateral arm rotation | upper limb
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| Serratus anterior | Ribs 1-8 | Scapula | Fixes scapula in place during ant. arm movement; rotates scapula so inferior angle moves lateral and upward; abduction and raising arm…horizontal arm mvt..boxers muscle | anterior thorax
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| Coracobrachialis | Scapula | Humerus | Arm flexsion; adduction | upper limb
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| Trapezius | ocipital (ext. occip. Prot. & sup nuchal line -ligamentum nuchae; C7; all T vertebrae | -scapula (spine, acromion) -clavicle | -elevation, depression, adduction of scalpula -extensor of head | posterior thorax
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| Rhomboid major | Adduction (retraction) of scapula; fixes scapula for arm mvt. | posterior thorax
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| Rhomboid minor | Adduction (retraction) of scapula; fixes scapula for arm mvt. | posterior thorax
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| Levator scapulae | Elevates scapula | posterior thorax
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| Latissimus dorsi | Thoracolumbar fascia; iliac crest; lower 3 ribs | Humerus | Extends, adducts, medially rotates arm | posterior thorax
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| Pelvic diaphragm -levator ani: pubococcygeus + iliococcygeus - coccyge | -both function to support pelvic floor & resists increased intraabdominal pressure; aids in defecation | pelvic muscle
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| Urogenital diaphragm | -stretches across anterior half of pelvic outlet to support the external genitals. | pelvic muscle
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| scalenes | -to elevate ribs 1 & 2 during inhalation; flex cervical spine;flex | vertebral muscles
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