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Anatomy muscles
Insertion/origin/action
| Term | Definition |
|---|---|
| temporalis origin | temporal bone |
| temporalis insertion | coronoid process of mandible |
| temporalis action | raises mandible |
| masseter origin | zygomatic arch |
| masseter insertion | angle/ramus of mandible |
| masseter action | raises mandible |
| sternocleidomastoid origin | manubrium of sternum/medial portion of the clavicle |
| sternocleidomastoid insertion | mastoid process of the temporal bone |
| sternocleidomastoid action | flexes the cervical vertebral column |
| trapezius origin | occipital bone/ligamentum nuchae |
| trapezius insertion | clavicle;acromion;and spine of scapula |
| trapezius action | rotates, adducts, and stabilizes scapula |
| levator scapulae origin | transverse process of upper cervical vertebrae |
| levator scapulae insertion | vertebral border of scapula |
| levator scapulae action | elevates scapula |
| pectoralis major origin | medial half of clavicle and sternum |
| pectoralis major insertion | greater tubercle of humerus |
| pectoralis major action | flexes, adducts, and medially rotates the arm |
| latissimus dorsi origin | spinous process of lower thoracic vertebrae |
| latissimus dorsi insertion | intertubercular groove of humerus |
| latissimus dorsi action | extends, adducts, and medially rotates ar |
| deltoid origin | clavicle; acromion; spine of scapula |
| deltoid insertion | deltoid tuberosity of humerus |
| deltoid action | abducts the arm |
| supraspinatus origin | supraspinous fossa of scapula |
| supraspinatus insertion | greater tubercle of humerus |
| supraspinatus action | abducts the arm |
| infraspinatus origin | infraspinous fossa of the scapula |
| infraspinatus insertion | greater tubercle of humerus |
| infraspinatus action | rotates the arm laterally |
| subscapularis origin | subscapular fossa of the scapula |
| subscapularis insertion | lesser tubercle of humerus |
| subscapularis action | rotates the arm medially |
| biceps brachii origin | coracoid process of the scapula |
| biceps brachii insertion | radial tuberosity of the radius |
| biceps brachii action | flexes the forearm and arm; supination of forearm |
| triceps brachii origin | infraglenoid tubercle of scapula and post surface if the humerus |
| triceps brachii insertion | olecranon process of the ulna |
| triceps brachii action | extends forearm |
| flexor carpi radialis origin | medial epicondyle of the humerus |
| flexor capri radialis insertion | 2nd and 3rd metacarpals |
| flexor carpi radialis action | flexes the hand |
| flexor capri ulnaris origin | medial epicondyle of the humerus |
| flexor carpi ulnaris insertion | 5th metacarpal |
| flexor carpi ulnaris action | flexes the hand |
| extensor carpi ulnaris origin | lateral epicondyle of the humerus |
| extensor carpi ulnaris insertion | 5th metacarpal |
| extensor carpi ulnaris action | extends the hand |
| extensor carpi radialis longus origin | supracondylar ridge of the humerus |
| extensor carpi radialis longus insertion | 2nd metacarpal |
| extensor carpi radialis longus action | extends the hand |
| gluteus maximus origin | gluteal line of the illium |
| gluteus maximus insertion | gluteal tuberosity of the femur |
| gluteus maximus action | extends and laterally rotates the thigh |
| iliacus origin | iliac crest of the illium |
| iliacus insertion | lesser trochanter of the femur |
| ilacus action | flexes the thigh |
| psoas major origin | transverse processes of the lumbar vertebrae |
| psoas major insertion | lesser trochanter of the femur |
| psoas major action | flexes the thigh |
| adductor magnus origin | inferior rams of the pubis and ischium |
| adductor magnus insertion | linea aspera of the femur |
| adductor magnus action |