Anatomy lab quiz UL

rotator cuff muslces

Supraspinatus, infraspinatus, subscapularis, teres minor

SITS acronym (rotator cuff)

Supraspinatus, infraspinatus, teres minor, subscapularis

Rotator cuff muscle actions

All Elephants Eat Ice, goes with SITS

abduction, external rotation, internal rotation

Supraspinatus innervation

suprascapular nerve

infraspinatus innervation

subscapular nerve

teres minor innervation

axillary nerve

subscapularis innervation

upper and lower subscapular nerves

deltoid action

major abductor of arm

Biceps action

flexion of elbow, synergist

coracobrachialis action

shoulder adduction and flexion

coracobrachialis innervation

musculocutaneous nerve

teres major action

shoulder extension, adduction, and medial rotation

teres major innervation

lower subscapular nerve

anterior deltoid action

flexion

lateral deltoid action

abduction

posterior deltoid action

extension

pectoralis major action

adduction, flexion, extension, medial rotation

posterior latissimus dorsi action

extension

pectoralis major innervation

medial and lateral pectoral nerves

deltoid other actions

medial and lateral rotation

deltoid innervation

axillary nerve

latissimus dorsi innervation

thoracodorsal nerve

palm up flexion muscles

biceps brachii

palm down flexion muscles

brachialis

Beer chugging muscle

brachioradialis

biceps brachii action

flexion and supination of elbow

flexion of shoulder

biceps brachii innervation

musculocutaneous nerve

brachialis action

flexion of elbow

brachialis innervation

musculocutaneous and radial nerve

brachioradialis action

flexion of elbowb

brachioradialis innervation

radial nerve

elbow joint

hinge: only flexion and extension

triceps brachii action

flexion of elbow

triceps brachii innervation

radial nerve

anconeus actions

extension of elbow

anconeus innervation

radial nerve

Muscles of flexion

anterior deltoid, biceps, coracobrachialis, pectoralis major

Muscles of extension

Posterior deltoid, triceps, latissimus dorsi, teres major

muscles of abduction

middle deltoid, supraspinatus, infraspinatus

muscles of adduction

pectoralis major, teres major, latissimus dorsi, coracobrachialis msu

muscles of medial rotation

pectoralis major, latissimus dorsi, teres major, subscapularis, anterior deltoid

muscles of lateral rotation

infraspinatus, posterior deltoid, teres minor

Broken clavicle

medial 1/3 goes up because help up by sternocleidomastoid and

lateral 2/3 pulled down by gravity and weight of arm

radius/ulna articulation

radius head with radial notch of ulna

radius/humerus articulation

radius head and capitulum of humerus

ulna/humerus articulation

coronoid process and coronoid fossa

olecranon process and olecranon fossa

trochlear notch and trochlea

finger naming example (pinky)

(palm) metacarpal V, proximal phalanx V, middle phalanx V, distal phalanx V (finger tip)

Hand flexor and pronator innervation

medial and ulnar nerve (anterior)

hand extensor innervations

radial nerve (posterior)

median nerve innervation

pronator teres, flexor carpi radialis, palmaris longus, flexor digitorum, superficialis

ulnar nerve innervation

flexor carpi, ulnaris

pronator muscles (palm down)

pronator teres and pronator quadratus

supinator muscles (palm up)

supinator

superficial hand flexors

flexor carpi radialis, flexor carpi ulnaris, flexor digitorium superficialis, palmaris longus

deep hand flexors

flexor pollicis longus, flexor digitorum profundus

flexor carpi radialis innervation

median nerve

flexor carpi ulnaris innervation

ulnar nerve

flexor digitorum profundus innervation

median and ulnar nerves

superficial hand extensors

extensor carpi radialis longus, extensor carpi radialis brevis, extensor carpi ulnaris, extensor digitorum, extensor digiti minimi

deep hand extensors

abductor pollicis longus, extensor pollicis longus, extensor pollicis brevis, extensor indicis

extensor radialis longus innervation

radial nerve

extensor carpi ulnaris innervation

deep radial nerve

finger innervation

median and ulnar nerve

thenar muscles

moves the thumb, all are pollicis, mostly innervated by median nerve

hypothenar muscles

move the pink, all are digiti minimi, all innervated by ulnar nerve

DIP (distal interphalangeal joint)

between middle and distal phalanx

PIP (proximal interphalangeal joint)

between proximal and middle phalanx

MCP (metacarpal phalangeal joint)

between metacarpals and proximal phalanx

interossei muscles

all innervated by ulnar nerve

palmer hand interossei

adduction of fingers “PAD”

Dorsal hand interossei

abduction of fingers “DAB”

lumbricals

extension of DIP and PIP joints

flexion of MCP joint

if median nerve cut at elbow, can still flex wrist?

yes bc flexor carpi ulnaris (ulnar nerve)

if median nerve cut at thumb, can still oppose thumb to fingers?

no bc oponens muscle (median nerve)

if radial nerve cut at elbow, can still extend interphalangeal joints?

yes bc interossei muscles (ulnar nerve)C

Claw hand

MCP- hyperextended

PIP and DIP- flexed

nerve involved- ulna

carpal tunnel

median nerve passes through

tennis elbow

caused by lots of flexion at wrist