ORIGINS/INSERTIONS/ACTIONS
Muscle | origin | insertion | action |
masseter | zygomatic arch | angle/ramus of mandible | elevates mandible |
Buccinator | maxillary bone | orbicularis oris muscle | compresses cheeks |
Orbicularis oculi | frontal bone | eyelid | blinking |
zygomaticus major | zygomatic bone | elevation of lateral corners of mouth | |
zygomaticus minor | skin and muscle at the corner of the mouth | ||
platysma | fascia of chest | lower margin of mandible | tenses skin of neck |
sternocleidomastoid | manubrium of sternum | mastoid process | rotation of the head |
pectoralis major | sternum | intertubercular sulcus of humerus | flexion of a |
deltoid | acromion and spine of scapula | deltoid tuberosity of humerus | abduction of the arm at the shoulder |
rectus abdominis | pubic crest and symphysis | xiphoid process of the sternum | rotates vertebral column |
external oblique | lower eight ribs | linea alba | flexion and rotation of vertebral column |
trapezius | occipital bone | acromion and spinous process of the scapula | elevation of scapula |
infraspinatus | infraspinous fossa | greater tubercle of the humerus | lateral rotation of the arm at the shoulder |
supraspinatus | supraspinous fossa | greater tubercle of the humerus | abduction of the arm at the shoulder |
triceps brachii | posterior humerus | olecranon of ulna | extension of the forearm at the elbow |
biceps brachii | coracoid process | radial tuberosity | flexion of the forearm at the elbow |
brachialis | anterior humerus | coronoid process of ulna | flexion of the forearm at the elbow |
flexor carpi radialis | medial epicondyle of the humerus | base of metacarpals 2 and 3 | flexion of the hand at the carpal joints |
extensor digitorum | lateral epicondyle of the humerus | distal phalanges of fingers of 2-5 | extension of the fingers at the metacarpal and phalangeal joints |
gracilis | ramus and body of the pubis | medial surface of tibia | adduction of thigh at the hip |
rectus femoris | anterior inferior iliac spine | tibial tuberosity | flexion of the thigh at the hip |
vastus medialis | linea aspera | tibial tuberosity | extension of the lower leg at the knee |
semitendinosus | ischial tuberosity | medial aspect of upper tibial shaft | extension of the thigh at the hip |
semimembranosus | ischial tuberosity | medial condyle of the tibia | extension of the thigh at the hip |
tibialis anterior | lateral condyle of the tibia | medial cuneiform bone | dorsiflexion |
gastrocnemius | medial and lateral condyles of the femur | calcaneus | plantar flexion |
Row 27 | |||
Row 28 |