13 Selected Muscles Flashcards
Triceps Brachii
Long head-Inferior margins of glenoid cavity
Medial head-Distal radial groove on posterior of humerus
Lateral head-Posterior of humerus
Instertion-Olecranon of Ulna
Action-POWERFUL Extensor of forearm
Biceps Brachii
Long head-Coracoid process
Short head-Supraglrnoid tubercle+lip of glenoid cavity
Insertion-Radial tuberosity
Action-POWERFUL flexor of forearm
Flexor carpi Ulnaris
Medial epicondyle of humerus, olecranon, and posterior surface of ulna
Insertion-Base of metacarpal 5, pisiform +hamate bones
Action-Flexes and adducts arm
Extensor carpi radialis brevis
Lateral epicondyle of humerus
Insertion-Base of metacarpal 3
Action-Extends and abducts arm
Gastrocnemius
Medial and lateral condyles of femur
Insertion-Calcaneal tendon inserts into calcaneus
Action-Plantarflexes foot
Sartorius
Anterior Superior Iliac spine
Inserts-By apneurosis into the medial aspect of the proximal tibia
Action-(ALL) Flexes thigh and leg, BUT abducts and laterally rotates thigh
Rectus femoris
Anterior inferior iliac spine
Inserts-Tibial tuberosity and patella
Action-Extends leg and flexes thigh
Vastus lateralis
(FUSSY)-gREATER trochanter, intertrochanteric line, linea aspera
-Inserts-Tibial tuberosity and patella
Extends leg+stabilizes knee
Biceps femoris (ISCHIAL)
LOng head-Ischial tuberosity
Short head-Linea aspera and distal femur
Inserts-
Action-Flexes leg and extends thigh
Sternocleidomastoid
Manubrium of sternum, and lateral portion of clavicle
Inserts-Mastoid process of temporal bone and inferior nuchal lines of occipital bone
Flexes neck, and allows rotation of head towards each shoulder laterally
Deltoid
Lateral 1/3 of the clavicle, Acromion, and Spine of scapula
Inserts-Deltoid tuberosity
Action-Prime mover in arm abduction
Supraspinatus
Supraspinous fossa
Inserts-Greater tubercle of humerus
Action-Inintiates arm abduction
Rectus abdominis
Iliac crest, iliac symphysis
Inserts-Xiphoid process and costal cartilage of ribs 5-7
Action-Flexes and laterally rotates vertebral column
