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26 Cards in this Set
- Front
- Back
area of the skin innervated by a single spinal nerve or spinal cord segment |
Dermatome
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subcutaneous tissue |
Superficial fascia |
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strong, dense connective tissue |
Deep fascia
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invests (covers) deeper structures such as muscle |
Investing layer of the deep fascia
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divide muscles into groups
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Intermuscular septa
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thickening of the deep fascia across tendons of muscles |
Retinaculum
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Trapezius: origin |
Occipital bone superior nuchal line |
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Trapezius: insertion
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Clavicle (lateral 1/3)
Acromion and spine of scapula |
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Trapezius: nerve supply
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spinal accessory nerve/cranial nerve XI - motor innervation
C3, C4 (ventral primary rami) - pain and proprioception |
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Trapezius: blood supply |
superficial branch of the transverse cervical artery (deep surface)
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Trapezius: action
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Holds upper limb to trunk
Adducts scapula (middle fibers) Raises scapula (upper fibers) Depresses scapula (lower fibers) Rotates scapula so that the inferior angle is moved laterally or abduction of upper limb above horizontal position |
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Latissimus dorsi: origin |
Spinous process of lower six thoracic vertebrae
Thoracolumbar fascia Iliac crest and lower 3 or 4 ribs |
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Latissimus dorsi: insertion
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Humerus (intertubercular groove)
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Latissimus dorsi: nerve supply
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Thoracodorsal nerve (C6, C7, C8 level of spinal cord) from the brachial plexus
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Latissimus dorsi: blood supply
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Thoracodorsal artery
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Latissimus dorsi: action
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pulls arm posteriorly (extends arm) and rotates medially
Adducts the arm - extends and medially rotates the humersus at the shoulder joint |
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a small triangular gap between muscles near the inferior angle of the scapula.
bounded by? |
Triangle of auscultation
bounded by: latissimus dorsi, trapezius, and medial border of the scapula |
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Levator scapulae: origin
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Transverse processes of first three or four cervical vertebrae
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Levator scapulae: insertion
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superior angle of scapula and along its upper medial border
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Levator scapulae: blood supply
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dorsal scapular artery (branch of axillary a) OR
deep branch of transverse cervical a |
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Levator scapulae: action
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elevates scapula
rotates scapula to move the glenoid cavity and shoulder joint inferiorly |
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Rhomboid major and minor: origin
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spines of lower cervical (C7) and upper thoracic (T1-T5) vertebrae
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Rhomboid major and minor: insertion
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medial border of scapula
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Rhomboid major and minor: blood supply
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dorsal scapular artery
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Rhomboid major and minor: action
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adduct scapula
rotate scapula so the glenoid cavity moves inferiorly |
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Rhomboid major and minor: nerve |
Dorsal scapular nerve (ventral ramus of C5) and some fibers from C4
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