anatomy exam 2 upper musc.

Trapezius

Origin: ligamentum nuchae, spines of c7-t12

Insertion: spine of scapula, acromion process, lateral 1/3 clavicle

Action: retraction of scapula, upper elevation, lower depression of scapula

Nerve: Spinal accessory nerve (CNXI)

Levator scapulae

Origin: c1-c4 (transverse process)

Insertion: medial border of scapula

Action: elevation of scapula g

Nerve: dorsal scapular nerve

Rhomboids (major and minor)

Origin: c7- t1(minor), t2-t5 (major)

Insertion: medial border of scapula

Action: retraction, elevation

Nerve: dorsal scapular nerve

Serratus anterior

Origin: lateral surface of ribs 1-8

Insertion: medial border of scapula

Action: protraction, lateral rotation of scapula

Nerve: long thoracic nerve

Pectoralis minor

Origin: ribs 3-5

Insertion: coracoid process

Action: protraction

Nerve: medial pectoral nerve

Pectoralis major

Origin: medial 2/3 clavicle sternum

Insertion: greater tubercle

Action: flexion, adduction, internal rotation

Nerve: medial/lateral pectoral nerve

Latissimus dorsi

Origin: spinous process of T6-T12

Insertion:floor of the bicipital groove

Action: extension, adduction, internal rotation

Nerve: thoracodorsal

Deltoid

Origin: spine of the scapula, acromion process, lateral 1/3 of the clavicle

Insertion: deltoid tuberosity

Action: flexion, internal rotation , extension, external rotation

Nerve: axillary

Subscapularis

Origin: subscapular fossa

Insertion: lesser tubercle

Action: internal rotation

Nerve: upper and lower subscapular

Supraspinatus

Origin: supraspinous fossa

Insertion: greater tubercle

Action: abduction

Nerve: suprascapular

Infraspinatus

Origin: infraspinatus fossa

Insertion: greater tubercle

Action: exterior rotation

Nerve: suprascapular

Teres minor

Origin: lateral border of the scapula

Insertion: greater tubercle

Action: external rotation

Nerve:axillary

Teres major

Origin: inferior angle, posterior scapula

Insertion: lesser tubercle

Action: internal rotation

Nerve:lower subscapular

Coracobrachilalis

Origin: coracoid process

Insertion: medial aspect of the humerus

Action: shoulder flexion

Nerve: musculocutaneous

Biceps brachii

Origin (long head): supraglenoid tubercle

Origin (short head): coracoid process

Insertion: radial tuberosity

Action: shoulder flexion, elbow flexion, forearm supination

Nerve: musculocutaneous

Brachialis

Origin: lower half of humerus

Insertion: ulnar tuberosity

Action: elbow flexion

Nerve: musculocutaneous

Triceps brachii

Origin (long head): infragenoid tubercle

Origin (lateral head): posterior surface of the humerus

Origin (medial head): posterior humerus beneath radial groove

Insertion: olecranon

Action: shoulder extension (LH) , elbow extension

Nerve: radial

Anconeus

Origin: lateral epicondyle

Insertion: olecranon process

Action: elbow extension

Nerve:radial

Pronator teres

Origin: medial epicondyle

Insertion:

Action: pronation

Nerve: median

Flexor carpi radialis

Origin: medial epicondyle

Insertion:

Action: wrist flexion, abduction

Nerve: median

Palmaris longus

Origin: medial epicondyle

Insertion:

Action: wrist flexion

Nerve: median

Felxor digitorum superficialis

Origin: medial epicondyle

Insertion:

Action: wrist flexion, flexion digits 2-5 (not dip)

Nerve: median

Flexor carpi ulnaris

Origin: medial epicondyle

Insertion:

Action: wrist flexion, adduction

Nerve: ulnar

Flexor pollicus longus

Origin:

Insertion:

Action: wrist flexion, flexion thumb (cmc, mcp, ip)

Nerve: median

Flexor digitorum profundus

Origin:

Insertion:

Action: wrist flexion, flexion digits 2-5 (mcp,pip,dip)

Nerve (radial half): median

Nerve (unlar half):ulnar

Pronator quadratus

Origin:

Insertion:

Action: pronation

Nerve: median

Brachioradialis

Origin: lateral epicondyle

Insertion:

Action: elbow flexion

Nerve: radial

Extensor carpi radialis longus/brevis

Origin: lateral epicondyle

Insertion:

Action: wrist extension, abduction

Nerve: radial

Extensor digitorum

Origin: lateral epicondyle

Insertion:

Action: wrist extension, extension digits 2-5 (mcp,pip,dip)

Nerve: radial

Extensor digiti minimi

Origin: lateral epicondyle

Insertion:

Action:extension digit 5 (mcp,pip,dip)

Nerve: radial

Extensor carpi ulnaris

Origin: lateral epicondyle

Insertion:

Action:wrist extension, adduction

Nerve: radial

Abductor pollicus longus

Origin:

Insertion:

Action: abducts the thumb (cmc)

Nerve:radial

Extensor pollicus brevis

Origin:

Insertion:

Action: extends thumb (cmc,mcp)

Nerve: radial

Extensor pollicus longus

Origin:

Insertion:

Action:extends thumb (cmc,mcp,ip)

Nerve: radial

Extensor indicis

Origin:

Insertion:

Action:extends digit 2

Nerve: radial

Supinator

Origin:

Insertion:

Action: supinates forearm

Nerve:radial

Abductor pollicus brevis

Origin:

Insertion:

Action: abducts thumb (cmc)

Nerve: median

Felxor pollicus brevis

Origin:

Insertion:

Action: flex thumb (mcp)

Nerve:median

Opponens pollicus

Origin:

Insertion:

Action:flexion, abduction thumb (cmc)

Nerve: median

Adductor pollicus

Origin:

Insertion:

Action: adduct thumb

Nerve:ulnar

Abductor digiti minimi

Origin:

Insertion:

Action: abduct digit 5 (mcp)

Nerve: ulnar

Flexor digiti minimi (brevis)

Origin:

Insertion:

Action:flex digit 5 (mcp)

Nerve: ulnar

Opponens digiti minimi

Origin:

Insertion:

Action: opposition digit 5 (cmc)

Nerve: ulnar

Lumbricales

Origin:

Insertion:

Action: flex mcp, holds ip joint

Nerve 1/2: median

Nerve 3/4:ulnar

Dorsal interossei

Origin:

Insertion:

Action: abduct digits 2-4 (mcp)

Nerve:ulnar

Palmar interossei

Origin:

Insertion:

Action: adducts figits 2,4,5

Nerve: ulnar