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18 Cards in this Set
- Front
- Back
Trapezius
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Innervation - Accessory Nerve (CN XI)
Blood Supply - Superficial branch of the transverse cervical artery Action: Upper - elevate shoulder Middle - retract scapula Lower - depress scapula abducts arm over shoulder along with serratus anterior |
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Latissimus Dorsi
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Innervation - Thoracodorsal N
Blood Supply - Thoracodorsal A/V Action - draws arm backward and inwards; adducts and internally rotates; raises arm while climbing |
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Levator Scapulae
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Innervation - Dorsal Scapular N (C5)
Blood Supply - Dorsal scapular artery Action - Elevates Scapula |
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Rhomboid major and minor
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Innervation - Dorsal Scapula N
Blood Supply - Dorsal Scapular A Action - Retracts Scapula (with Traps) |
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Serratus Anterior
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Innervation - Long Thoracic N
Blood Supply - Lateral thoracic A; thoracodorsal A Actions - protracts scapula; rotates scapula for abduction and flexion of arm; helps in abduction of shoulder over head |
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Deltoid
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Innervation - Axillary N
Blood Supply - Suprascapular A, scapular circumflex A Actions: |
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Supraspinatus
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Innervation - Suprascapular N (C4,5,6)
Blood Supply - Suprascapular A Action - Initiates abduction of shoulder; 0-15 degrees |
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Infraspinatus
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Innervation - Suprascapular N
Blood Supply - Suprascapular A, Scapular Circumflex A Action - lateral rotation of shoulder |
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Teres Minor
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Innervation - Axillary N
Blood Supply - Scapular Circumflex A Action - Lateral rotation of shoulder |
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Teres Major
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Innervation - Lower Subscapular N
Blood Supply - Thoracodorsal A Action - adduction and medial rotation |
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Subscapularis
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Innervation - Upper and Lower subscapular N
Blood Supply - Braches of subscapular A Action - medial rotation at shoulder; adduction of arm |
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Subclavius
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Innervation - Nerve to the Subclavius (C5-C6)
Blood Supply - Clavicular branch of the thoracoacromial trunk Action - not significant; steadies clavicle |
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Pectoralis Major
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Innervation: Lateral and Medial Pectoral N
Blood Supply - Pectoral branch of thoracoacromial trunk Actions: (at shoulder) -adduction -medial rotation -flexion (upper fibers) -extension of flexed arm (lower fibers) |
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Pectoralis Minor
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Innervation - Medial and Lateral Pectoral N
Blood Supply - Pectoral branch of thoracoacromial trunk Action - steadies scapula; depresses point of shoulder; helps in forced inspiration by elevation of ribs |
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What are the borders of the triangle of auscultation?
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Medial border - Trapezius
Lateral border - Teres major/scapula Inferior border (base) - Lats |
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What are the borders of the quadrangular space?
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Superior border - teres minor, subscapularis
Inferior border - teres major Lateral border - lateral head of triceps, surgical neck of humerus Medial border - Long head of triceps |
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What are the borders of the upper triangular space?
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Lateral border - long head of triceps
Upper border - Teres minor and subscapularis Lower border - Teres Major Contains Circumflex scapular branch of subscapular A |
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What are the borders of the lower triangular space?
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lies adjacent to humerus
medial border - long head of triceps lateral border - shaft of humerus superior border - teres major contains radial nerve and profundi brachii artery |