shoulder and arms region

• Function: acting as a whole, prime mover of arm abduction; can aid in flexion, extension & rotation of humerus when specific fibers are active
• Origin: lateral 1/3 of clavicle; acromion & spine of clavicle
• Insertion: deltoid tuberosity of humerus

• Function: lateral rotation of humerus; helps hold head of humerus in glenoid cavity; stabilizes shoulder; abducts and laterally rotates arm
• Origin: infraspinous fossa of scapula
• Insertion: greater tubercle of humerus

• Function: raises scapula and draws it medially; with scapula fixed, flexes neck to same side
• Origin: cervical vertebrae (upper 3 or 4) &
• transverse processes
• Insertion: scapula (medial border superior part)

• Function: internal rotation, anterior & posterior stability)
• Origin: subscapularis fossa of scapula
• Insertion: humerus (proximal anterior)..lesser tubercle

• Function: initiates abduction of humerus; stabilizes shoulder joint
• Origin: supraspinous fossa of scapula
• Insertion: greater tubercle of humerus

• Teres Major (located superiorly to teres minor)
• Function: extends, medially rotates, & adducts humerus; synergist of latissimus dorsi
• Origin: posterior surface at inferior angle of scapula
• Insertion: intertubercular sulcus of humerus

• Teres Minor (located inferiorly to teres major)
• Function: same as infraspinatus laterally rotation of humerus; helps hold head of humerus in glenoid cavity; stabilizes shoulder
• Origin: posterior surface at inferior angle of scapula
• Insertion: intertubercular sulcus of humerus

• Biceps Brachii long and short head
• Function: flexion (powerful) of elbow & supination of forearm
• Origin: short head (coracoid process); tendon of long head runs in intertubercular sulcus & within capsule of shoulder joint
• Insertion: radial tuberosity

• Function: major flexion of forearm
• Origin: distal portion of anterior humerus
• Insertion: coronoid process of ulna

• Function: synergist in forearm flexion
• Origin: lateral ridge at distal end of humerus (lateral condyle)
• Insertion: base of styloid process of radius

• function: flexion and abduction of arm/shoulder
• Origin:
• Insertion:

• Function: extends forearm (long head stabilizes shoulder joint)
• Origin:
• Insertion:

Function: abducts ulna during forearm pronation; extends elbow

Function: abducts and extends thumb

extends and abducts wrist

Function: prime mover off finger extension; extends wrist; can flare (abduct) fingers)

Function: extend thumb

Function: powerful flexior of wrist; adducts hand

Function: flexes wrist & middle phalanges of fibers 2-5

Function: pronates forearm

Function: flexes thumb

Function: flexes wrist (weak); tenses skin & fascia of palm

Function: acts synergistically with pronatior quadratus to pronate forearm; weak elbow flexor

Function: pronates forearm

Function: acts with buceo brachii to supinate forarm; antagonist of pronator muscles

• Function: flexion and abduction of arm/shoulder
• Origin: attach to coracoid process of scapula
• Insertion: middle of medial surcace and border of body of humerus (shaft of humerus)

• Function: extends forearm (long head stabilizes shoulder joint)
• Origin: scapula and humorous (posterior: superior and inferior to radial groove)
• Insertion: ulna (proximal posterior: olecranon process)

Function: extensor muscle for the pinky finger

Function: extends index finger