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arm&shoulder muscles
lab help
| Question | Answer |
|---|---|
| Pectoralis minor | O: ribs I: coracoid process A: brings scapula down & forward |
| teres major | O: inferior angle of the scapula I: lessesr tubercle A: extends arm |
| serratus anterior | O: ribs I: medial border of scapula A: abducts and flexes arm at shoulder |
| pectoralis major | O: clavicle sternum and ribs I: greater tubercle A: adducts and flexes arm |
| brachialis | O: humerus I: coronoid process A: flexes the elbow |
| which 2 muscles holds head of humerus in place? | supraspinatus & infraspinatus |
| Brachioradialis | O: humerus I: styloid process of radius A: flexes the elbow |
| trapezius | 2 orgins and actions O: occipital bone A: elevates scapula O:spines of thoracic vertebrae A: depresses scapula I: acromion, spine of scapula, and clavicle |
| levator scapulae | O: transverse processes of cervical vertebrae I: top of the scapula A: elevates scapula |
| latissimus dorsi | O: lumbodorsal fascia (mostly) I: intertubercular groove A: extends arm |
| supraspinatus | O:supraspinous fossa I:greater tubercle A: rotator cuff muscle |
| infraspinatus | O: infraspinous fossa I: greater tubercle A: rotator cuff muscle |
| biceps brachii | O: coracoid process and intertubercular groove I:radial tuberosity A: flexes elbow |
| deltoid | O: clavicle , acromion process and spine of scapula I:deltoid tuberosity A: abducts arm |
| triceps brachii | O: glenoid fossa & humerus I: olecranon process A: extends forearm |