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Upper Muscles O & I
Lab
| Question | Answer |
|---|---|
| Temporalis | Origin: temporal bone Insertion: Coronoid process of mandible Action: Elevates mandible |
| Masseter | Origin: Zygomatic arch Insertion: Coronoid process, angle of mandible Action: Elevates mandible |
| Medial Pterygoid | O: Maxilla, palatine, & medial surface of lateral pterygoid plate I: Ramus of the mandible A: Side to side mastication elevates mandible |
| Lateral pterygoid | O: Greater wing of sphenoid and lateral surface of lateral pterygoid plate I: Condylar process of mandible A: Side to side mastication depresses mandible |
| Digastric | O: mental protuberance, mastoid process I: Hyoid bone A: Elevates hyoid |
| Mylohyoid | O: Mandible I: hyoid bone A: elevates hyoid |
| Sternocleidomastoid | O: Sternum and clavicle I: Mastoid process A: Head flexion/rotation |
| Trapezius | O: Superior nuchal line, spinous processes of C7-T12 I: Clavicle, acromion process, and spine of scapula A: Rotates and elevates scapula |
| Levator scapulae | O: Transverse processes of C1-C4 I: Medial border of scapula A:Raises angle of scapula |
| Rhomboid major | O: Spinous processes of T2-T5 I: medial border of scapula A: retracts scapula |
| Rhomboid minor | O: Spinous processes of C7-T1 I: Medial border of scapula A: Retracts scapula |
| Serratus anterior | O: Ribs 1-8 I: Medial border of scapula A:Protracts scapula |
| Pectoralis minor | O: Ribs 3-5 I: Coracoid process of scapula A: Stabilizes scapula |
| Deltoid | O: Clavicle, acromion process and spine of scapula I: Deltoid tuberosity A: Abducts, flexes, and extends shoulder |
| Coracobrachialis | O: Coracoid process of scapula I: Middle medial shaft of humerus A: Adducts humerus |
| Biceps Brachii | O: Supraglenoid tubercle and coracoid process I: Radial tuberosity A: Flexes elbow joint, supinates forearm |
| Triceps Brachii | O: Infraglenoid tubercle and shaft of humerus I: olecranon process of ulna A: Extends and adducts arm |
| Supraspinatus | O: Supraspinous fossa I: Greater tubercle of humerus A: Abducts arm |
| Infraspinatus | O: Infraspinous fossa I: greater tubercle of humerus A: adducts arm |
| Teres minor | O: Lateral border of scapula I: Greater tubercle of humerus A: adducts arm |
| Subscapularis | O: Subscapular fossa I: Lesser tubercle of humerus A: medially rotates arm |
| Pectoralis major | O: Clavicle, sternum, ribs 2-6 I: Intertubercular groove A: adducts humerus |
| Teres major | O: Lateral border and inferior angle of scapula I: Intertubercular groove A: Extend, adducts, and medially rotates arm |
| Latissimus dorsi | O: Spinous processes T7-T12, ribs 8-12, iliac crest, thoracolumbar fascia I: intertubercular groove A: primarily extends arm, adducts/rotates arm |
| Brachialis | O: anterior shaft of humerus I: Coronoid process of ulna A: Flexion at elbow joint |
| Brachioradialis | O: lateral supracondylar ridge of humerus I: styloid process of radius A: flexes/adducts forearm |
| Supinator | O: lateral epicondyle of humerus and supinator crest I: lateral surface of radius A: supinates forearm and wrist |
| Pronator teres | O: medial epicondyle of humerus and coronoid process of ulna I: lateral surface of radius A: pronates forearm and wrist |
Created by:
punkaloo
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