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28 Cards in this Set
- Front
- Back
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Name the muscles of the pectoral region
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- Pectoralis major
- Pectoralis minor - Subclavius - Serratus anterior - Trapezius - Latissimus dorsi - Rhomboids |
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Pectoralis major
O & I |
O:
1) anterior medial 1/2 of clavicle 2) anterior surface of sternum 3) superior 7 costal cartilages 4) aponeurosis of external oblique muscle I: lateral lip of intertubercular groove of humerus |
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Pectoralis major
Innervation |
lateral and medial pectoral
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Pectoralis major
Vasculature |
thoracoacromial
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Pectoralis major
Main Action |
adduct humerus
medially rotate humerus draws scapula anterior and inferior |
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Pectoralis minor
O & I |
O: ribs 3-5 near costal cartilages
I: medial and superior aspect of coracoid process |
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Pectoralis minor
Innervation |
medial pectoral
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Pectoralis minor
Vasculature |
lateral thoracic
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Pectoralis minor
Main Action |
stabilizes scapula by drawing it inferior and anterior (depresses tip of shoulder)
protracts scapula |
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Subclavius
O & I |
O: junction of rib 1 and costal cartilage
I: inferior middle 1/3 of clavicle |
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Subclavius
Innervation |
nerve to subclavius
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Subclavius
Vasculature |
thoracoacromial
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Subclavius
Main Action |
anchors and depresses clavicle
stabilizes sternocostal joint protects subclavian artery (if clavicle is fractured) |
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Serratus anterior
O & I |
O: ribs 1-8
I: anterior medial border of scapula |
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Serratus anterior
Innervation |
long thoracic
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Serratus anterior
Vasculature |
lateral thoracic and thoracodorsal
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Serratus anterior
Main Action |
protracts scapula
holds it against thoracic wall rotates scapula |
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Recite the origin, insertion, innervation, vasculature, and main action of the trapezius
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review if necessary
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Recite the origin, insertion, innervation, vasculature, and main action of the latissimus dorsi
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review if necessary
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Recite the origin, insertion, innervation, vasculature, and main action of the levator scapulae
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review if necessary
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Recite the origin, insertion, innervation, vasculature, and main action of the rhomboid major
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review if necessary
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Recite the origin, insertion, innervation, vasculature, and main action of the rhomboid minor
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review if necessary
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What is the lay term for the axilla?
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Armpit
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Describe the axilla
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pyramidal space at junction of arm and thorax
inferior to glenohumeral joint passageway for large, important nerves and vessels to reach UE (*brachial plexus) has 4 walls, with apex pointing toward root of neck and base pointing downward and outward |
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Boundaries of the axilla: base
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- toward lower part of body
- composed of fascia and skin of concave of axilla |
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Boundaries of the axilla: apex
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- toward root of neck
- located at medial side of root of coracoid process of scapula - anterior: clavicle - posterior: scapula - medial: first rib |
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Boundaries of the axilla: walls
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- anterior: clavicle, pectoral and subclavius muscles
- posterior: scapula, subscapularis, teres major, and latissimus dorsi muscles - medial: ribs, intercostal and serratus anterior muscles - lateral: floor of intertubercular groove of humerus |
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Name the contents of the axilla
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- branches of the brachial plexus ( 3 cords)
- axillary vessels (artery, vein, and lymph) - axillary lymph nodes: - apical - pectoral - subscapular - humeral - central |
