Human Anatomy Muscles Part 1
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Created by:
phaedragiannini on February 20, 2011
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53 terms
Latin | English |
|---|---|
| sternocleiodmastoid (action) |  Flexes and laterally rotates the head |
| Scalenes (Ant, mid, post) (Action) | Elevate fist two ribs, Aid in inspiration |
| Splenius capitis and cervicis (action) | Extension/hyperextension of head |
| Erector spinae (iliocostalis, Longissimus, spinalis) (action) | trunk extension, rotation, and lateral flexion of vertebral column |
| Semispinalis (Thoracis, cervicis, capitis region) (action) | Extends vertebral column |
| Quadratus lumborum (action) | Flexes vertebral column laterally, pelvic elevation |
| External intercostals (action) | Pulls ribs toward one another to elevate rib cage |
| Internal intercostals (action) | Draws ribs together and depress rib cage |
| Diaphragm (innervation) | Phernic n. C4 |
| Diaphragm (action) | Prime mover of inspiration; flattens on contraction |
| External / Internal oblique (action) | Compresses abdominal contents Trunk rotation and lateral flexion |
| Transversus abdominis (action) | Compresses abdominal contents |
| Rectus abdominis (action) | Flex and rotate lumbar region of vertebral column |
| Pectoralis major (action) | Prime mover of arm flexion; rotates arm medially; adducts arm |
| Pectoralis major (origin) | Sternal end of clavicle, sternum, cartilage of ribs 1-6, and aponeurosis of external oblique m. |
| Pectoralis major (insertion) | Fibers converge to insert by a short tendon into lateral side of the intertubercular sulcus of the humerus |
| Pectoralis major (innerveration) | Lateral and medial pectoral nn. C5-8, T1 |
| Pectoralis minor (origin) | Anterior surface of ribs 3-5 (or 2-4) |
| Pectoralis minor (insertion) | Coracoid process of scapula |
| Pectoralis minor (innervation) | Medial and lateral pectoral nn. C6-8 |
| Pectoralis minor (action) | With ribs fixed, draws scapula forward |
| Serratus anterior (origin) | muscle slips from ribs 1-8 or 9 |
| Serratus anterior (insertion) | Entire anterior surface of vertebral border of scapula |
| Serratus anterior (innervation) | Long thoracic n. C5-7 |
| Serratus anterior (action) | Rotates scapula so that its inferior angle moves laterally and upward Scapular abduction |
| Trapezius I ( upper fibers) (Origin) | Occipital protruberance, spinous processes C1-7 |
| Trapezius I ( upper fibers) (Insertion) | Lateral 1/3 of clavicle and acromion of scapula |
| Trapezius I ( upper fibers) (Innervation) | Accessory n. C3-4 |
| Trapezius I ( upper fibers) (Action) | Scapular elevation, scapular upward rotation |
| Trapezius II (middle fibers) (origin) | spinous processes C1-T5 |
| Trapezius II (middle fibers) (insertion) | Medial margin of acromion process, superior spine of scapula |
| Trapezius II (middle fibers) (innervation) | Accessory n. ,C3-4 |
| Trapezius II (middle fibers) (action) | Scapular adduction |
| Trapezius III (lower fibers) (origin) | spinous processes T6-12 |
| Trapezius III (lower fibers) (insertion) | Medial spine of scapula and tubercle at apex of spine of scapula |
| Trapezius III (lower fibers) (innervation) | Accessory n. C3-4 |
| Trapezius III (lower fibers) (action) | Scapular depression, and upward rotation |
| Levator scapulae (origin) | Transverses processes of C1-4 |
| Levator scapulae (insertion) | Medial border of scapula, superior to the spine (superior angle of scapula) |
| Levator scapulae (innervation) | dorsal scapular n. C4-5 |
| Levator scapulae (action) | Elevates /adducts scapula |
| Rhomboid major (origin) | spinous processes of T2-5 |
| Rhomboid major (insertion) | Medial border of scapula |
| Rhomboid major (Innervation) | Dorsal scapular n. C4-5 |
| Rhomboid major (action) | scapula adduction and downward rotation |
| Rhomboid minor (origin) | Ligamentum nuchae and Spinous processes C7- T1 |
| Rhomboid minor (insertion) | Medial border of scapula |
| Rhomboid minor (innervation) | Dorsal scapular n. C4-5 |
| Rhomboid minor (action) | Stabilize and addicts scapula |
| Latissimus dorsi (origin) | Spinous processes of T7 -T12, thoracolumbar fascia, iliac crest, and inferior 3 or 4 ribs |
| Latissimus dorsi (insertion) | intertubercular sulcus of humerus |
| Latissimus dorsi (innervation) | Thoracodorsal n. C6-8 |
| Latissimus dorsi (action) | Prime mover of arm extension; adduction and medial rotation at shoulder |
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