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bone origins
| Question | Answer |
|---|---|
| trapezius | dorsal midline of neck and thorax |
| rhomboideus | -caudal surface of skull -dorsal midline of neck and thorax |
| serratus ventralis | -last 5 cervical vertebrae -first 7-8 ribs |
| omotransversarius | wing of atlas |
| brachiocephalicus | -mastoid process -cranial half of dorsal midline of neck |
| latissimus dorsi | spinous process of thoracic and first few lumbar vertebrae via the toracolumbar fascia |
| superficial pectoral | cranial sternum |
| deep pectoral | length of sternum |
| extrinsic muscles attaching to scapula | trapezius rhomboideus serratus ventralis omotransversarius |
| extrinsic muscles attaching to humerus | brachipcephalicus latissimus dorsi superficial pectoral deep pectoral |
| craniolateral muscles of forearm | extensor carpi radialis common digital extensor lateral digital extensor ulnaris lateralis abductor pollicus longus |
| caudomedial muscles of forearm | flexor carpi ulnaris flexor carpi radialis superficial digital flexor deep digital flexor ***all have an origin at medial epicondyle of humerus*** |
| lateral muscles of shoulder | supraspinatus infraspinatus deltoideus |
| medial muscles of shoulder | subscapularis teres major |
| branial muscles of arm | biceps brachii brachialis |
| caudal muscles of arm | tensor fascia antebrachii triceps brachii |
| extensor carpi radialis | lateral epicondyle of humerus |
| common digital extensor | lateral epicondyle of humerus |
| lateral digital extensor | lateral epicondyle of humerus |
| ulnaris lateralis | lateral epicondyle of humerus |
| abductor pollicus longus | -middle third of lateral border of ulna -adjacent interosseous membrane |
| muscles with origin at lateral epicondyle of humerus | extensor carpi radialis common digital extensor lateral digital extensor ulnaris lateralis |
| flexor carpi ulnaris | -medial epicondyle of humerus -caudomedial surface of olecranon of ulna |
| flexor carpi radialis | medial epicondyle of humerus |
| superficial digital flexor | medial epicondyle of humerus |
| deep digital flexor | -medial epicondyle of humerus -caudal border of ulna -medial border of radius |
| supraspinatus | supraspinous fossa of scapula |
| infraspinatus | infraspinous fossa of scapula |
| deltoideus | spine and acromion of scapula |
| subscapularis | subscapular fossa of scapula |
| teres major | proximal portion of distal border of scapula |
| biceps brachii | supraglenoid tubercle of scapula |
| brachialis | proximal part of lateral humerus (brachial groove) |
| tensor fascia antebrachii | fascia on lateral surface of latissimus dorsi |
| triceps brachii | -long:caudal border of scapula, distal to origin of teres major m. -lateral: tricipital line of humerus -medial: crest of lesser tubercle -accessory: neck of humerus |