Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
14 Cards in this Set
- Front
- Back
|
Origin: fascia of chest Insertion: lower margin of mandible and muscle at corner of mouth Action: tenses skin of neck, depresses mandible, pulls lower lip back down |
PLATYSMA |
|
|
Origin: temporal fossa Insertion: coronoid process of mandible Action: closes jaw, elevates and retracts mandible |
TEMPORALISO |
|
|
Origin: manubrium of sternum and medial portion of clavicle Insertion: mastoid process of temporal bone and superior nuchal line of occipital bone Action: simultaneous contraction= flexion of neck, independent =rotate head toward shoulder on opposite side |
STERNOCLEIDOMASTOID |
|
|
Origin: clavicle, sternum, cartilage of ribs 1-6 (or 7) and aponeurosis of external oblique muscle Insertion: fibers converge to insert by short tendon into intertubercular sulcus of humerus Action: prime mover of arm flexion, adducts, medially rotates arm |
PECTORALIS MAJOR |
|
|
Origin: occipital bone, ligamentum nuchae, spines of c7 and all thoracic vertebrae Insertion: acromion and spinous process of scapula lateral third of clavicle Action: extends head, raises, rotates, and adducts (retracts) scapula and stabilizes it |
TRAPEZIUS |
|
|
Origin: indirect attachment to spinous processes of lower six thoracic vertebrae, lumbar vertebrae, last 3-4 ribs, and iliac crest Insertion: floor of intertubercular sulcus of humerus Action: prime mover of arm extension, adducts and medially rotates arm |
LATISSIMUS DORSI |
|
|
Biceps Brachii |
Origin: short head, coracoid process; long head, supraglenoid tubercle and lip of glenoid cavity Insertion: radial tuberosity Action: flexion and supination of forearm |
|
|
Triceps Brachii |
Origin: long head, inferior margin of the glenoid cavity; lateral head, posterior humerus; medial head, distal radial groove on posterior humerus |
|
|
Extensor digitorum |
Origin: lateral epicondyle of humerus Insertion: by four tendons into the distal phalanges of fingers 2-5 Action: prime mover of finger extension; extends hand can abduct fingers |
|
|
Gracilis |
Origin: inferior ramus and body of pubis Insertion: medial surface of tibia just inferior to medial condyle Action: adducts thigh, flexes and medially rotates leg, especially during walking |
|
|
Tibialis anterior |
Origin: lateral condyle and upper 2/3 of tibia, interosseous membrane Insertion: by tendon into inferior surface of first cuneiform and metatarsal 1 Action: prime mover of dorsiflexion, inverts foot supports longitudinal arch of foot |
|
|
Soleus |
Origin: proximal portion of tibia and fibula, interosseous membrane Insertion: calcaneus via calcaneal tendon Action: plantar flexion, an important muscle for locomotion |
|
|
Gluteus maximus |
Origin: dorsal ilium, sacrum, and coccyx Insertion: gluteal tuberosity of femur and iliotibial tract Action: complex, powerful thigh extensor, antagonist of ilioposoas, laterally rotates and abducts thigh |
|
|
Rectus abdominis |
Origin: pubic crest and symphysis Insertion: xiphoid process and costal cartilages of ribs 5-7 Action: flexes and rotates vertebral column, increases abdominal pressure, fixes and depresses ribs, stabilizes pelvis during walking, used in sit ups and curls |
