lab 8 quiz hehe :) wow :) nice :) so nice :) haha :) smiles!!! :) all is well!!!!! haha!!

Serratus Anterior

Origin: series of muscle branches from first 8 ribs

Insertion: entire anterior surface of medial border of scapula

Action: rotates scapula so its inferior angle moves laterally and upwards

Trapezius

origin:

spinous processes of C7 and all thoracic vertebrae

occipital bone

ligamentum nuchae

insertion:

lateral third of clavicle

acromion of scapula

spine of scapula

action: stabilizes, elevates, retracts, and rotates scapula

Latissimus Dorsi

origin:

indirect attachment via lumbodorsal fascia into spines of last 6 thoracic vertebrae

last 3 or 4 ribs

iliac crest

insertion: spirals around teres major to insert in floor of tubercular sulcus of humerus

action: prime mover of arm extension, powerful arm adductor, medially rotates arm

supraspinatus

origin:

supraspinous fossa of scapula

Insertion:

superior part of greater tubercle of humerus

action:

initiates abduction of arm

infraspinatus

origin: infraspinous fossa of scapula

insertion: greater tubercle of humerus posterior to insertion of supraspinatus

action: rotates arm laterally

subscapularis

origin: subscapular fossa of scapula

insertion: lesser tubercle of humerus

action: rotates arm medially

teres minor

origin: lateral border of dorsal scapular surface

insertion: greater tubercle of humerus inferior to infraspinatous insertion

action: rotates arm laterally

teres major

origin: posterior surface of scapula at inferior angle

insertion:

-crest of lesser tubercle on anterior humerus

-insertion tendon fused with that of latissimus dorsi

action:

extends, medially rotates, and adducts arms

rhomboids

origin: spinous processes of C7 and T1

spinous processes of T2-T5

Insertion: medial border of scapula

Action: stabilize scapula

Levator scapulae

Deltoid

Origin:

lateral third of clavicle

acromion and spine of scapula

insertion: deltoid tuberosity of humerus

action: primer mover of arm abduction when all its fibers contract simultaneously

Biceps Brachii

Origin:

short head; coracoid process

long head; supraglenoid tubercle and lip of glenoid cavity

tendon of long head into intertubercular sulcus

Insertion: by tendon into radial tuberosity

action: flexes and supinates forearm

Brachialis

Origin: anterior surface of distal humerus

Insertion: coronoid process of ulna and capsule of elbow joint

action: a major forearm flexor

Triceps Brachii

Origin:

long head; infraglenoid tubercle of scapula

lateral head: posterior shaft of humerus

medial head: posterior shaft of humerus distal to radial groove

Insertion:

common tendon into olecranon of ulna

action: powerful forearm extensor

Pronator teres

Flexor Carpi Radialis

Flexor Carpi Ulnaris

Flexor digitorum superficialis

Flexor digitorum profundus

brachioradialis

extensor carpi radialis longus

extensor carpi radialis longus

extensor carpi radialis brevis

extensor digitorum

supinator

supinator