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Anatomy Quiz2
Axio-appendicular
| Term | Definition |
|---|---|
| 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 |
| Pectoralis Major - Distal Attachment | lateral lip of the Intertubercular sulcus of the humerus |
| Pectoralis Major - Innervation | lateral and medial pectoral nerves; clavicular head C5, C6; sternocostal head C7, C8, T1 |
| Pectoralis Major - Main Action | adducts and medially rotates humerus: draws scapula anteriorly and inferiorly; clavicular head flexes humerus & sternocostal head extends humerus |
| Pectoralis Minor - Proximal Attachment | 3rd - 5th ribs near their costal cartilages |
| Pectoralis Minor - Distal Attachment | medial border and superior surface of the coracoid process of the scapula |
| Pectoralis Minor - Innervation | medial pectoral nerve C8, T1 |
| Pectoralis Minor - Main Action | stabilizes scapula by drawing it anteriorly and inferiorly to the thoracic wall |
| Subclavius - Proximal Attachment | junction of the 1st rib and its costal cartilage |
| Subclavius - Distal Attachment | inferior surface of the clavicle |
| Subclavius - Innervation | nerve to the subclavius C5, C6 |
| Subclavius - Main Action | anchors and depresses clavicle |
| Serratus Anterior - Proximal Attachment | external surface of the 1st - 8th ribs |
| Serratus Anterior - Distal Attachment | medial boarder of the scapula |
| Serratus Anterior - Innervation | long thoracic nerve C5, C6 ,C7 |
| Serratus Anterior - Main Action | rotates and protracts scapula and holds it against the thoracic wall |
| Trapezius - Proximal Attachment | medial third of superior nuchal line; external occipital protuberance; nuchal ligament; spinous processes of C7- T12 vertebra |
| Trapezius - Distal Attachment | lateral third of clavicle; acromion and spine of scapula |
| Trapezius - Innervation | Spinal accessory nerve and spinal nerves C3, C4 |
| Trapezius - Muscle Action | elevates, depresses, and middle part retracts scapula; rotate glenoid cavity superiorly |