Axio-appendicular
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Pectoralis Major - Proximal Attachment | clavicular head: anterior surface of medial half of clavicle
sternocostal head: anterior surface of sternum, superior 6 costal cartilages, & aponeurosis of the external oblique
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| Pectoralis Major - Distal Attachment | lateral lip of the Intertubercular sulcus of the humerus
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| Pectoralis Major - Innervation | lateral and medial pectoral nerves; clavicular head C5, C6; sternocostal head C7, C8, T1
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| Pectoralis Major - Main Action | adducts and medially rotates humerus:
draws scapula anteriorly and inferiorly;
clavicular head flexes humerus & sternocostal head extends humerus
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| Pectoralis Minor - Proximal Attachment | 3rd - 5th ribs near their costal cartilages
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| Pectoralis Minor - Distal Attachment | medial border and superior surface of the coracoid process of the scapula
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| Pectoralis Minor - Innervation | medial pectoral nerve C8, T1
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| Pectoralis Minor - Main Action | stabilizes scapula by drawing it anteriorly and inferiorly to the thoracic wall
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| Subclavius - Proximal Attachment | junction of the 1st rib and its costal cartilage
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| Subclavius - Distal Attachment | inferior surface of the clavicle
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| Subclavius - Innervation | nerve to the subclavius C5, C6
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| Subclavius - Main Action | anchors and depresses clavicle
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| Serratus Anterior - Proximal Attachment | external surface of the 1st - 8th ribs
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| Serratus Anterior - Distal Attachment | medial boarder of the scapula
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| Serratus Anterior - Innervation | long thoracic nerve C5, C6 ,C7
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| Serratus Anterior - Main Action | rotates and protracts scapula and holds it against the thoracic wall
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| Trapezius - Proximal Attachment | medial third of superior nuchal line;
external occipital protuberance;
nuchal ligament;
spinous processes of C7- T12 vertebra
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| Trapezius - Distal Attachment | lateral third of clavicle;
acromion and spine of scapula
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| Trapezius - Innervation | Spinal accessory nerve and spinal nerves C3, C4
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| Trapezius - Muscle Action | elevates, depresses, and middle part retracts scapula;
rotate glenoid cavity superiorly
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Created by:
MandaRod
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