peripheral nervous system Flashcards
nerve supply of trap
accessory nerve (XI)
function of trap
pull down scapula lateral rotation of scapula, scapula towards midline, elevate scapula, extend cervical to ipsilateral side
when I say trap you say
CN XI and SCAPULAAA
nerve supply of rhomboid major
C4-5 (minor is just C4)
rhomboid (major and minor) function
elevate scapula retract towards spine
innervation of serratus anterior
long thoracic nerve (C5-7)
function of serratus
protracts scapula and rotates laterally to elevated position, fixes ant scapila to thoracic wall
innervation pec major
C8-T1
function pec major
adduct and medially rotate arm
pec minor innervation
C6-C8 (opposed to major which is C8-T1)
function pec minor
fixes scapula to thoracic wall to prevent dorsal shifting, can also draw shoulder blade inferiorly and medially
innervation to subscapularis
C5-6 (subscapular nerves)
subscapular action
medial rotator of arm
deltoid innervation
axillary nerve C5-6
deltoid function
shoulder abductor
supraspinatus innervation
suprascapular nerve C4-6
supraspinatus function
abducts arm along with deltoid
infraspinatus innervation
suprascapular nerve C5-6
infraspinatus function
lateral rotator of arm
teres minor innervation
axillary nerve C5-6
teres minor function
rotates arm laterally and adducts to
latissisimus dorsi innervation
thoracodorsal nerve C6-8
lat function
extends and adducts as well as medially rotates humerus
teres major innervation
thoracodorsal nerve C5-7
teres major function
adducts and medially rotates humerus (same function of lat dorsi pretty much)
biceps brachii innervation
musculocutaneous nerve C5-6
function biceps brachii
flexes and supinates at elbow joint
brachialis muscle innervation
musk cutaneous nerve C5-7 and radial nerve C5-6
brachialis function
elbow flexion!!!!
brachioradialis innervation
radial nerve C5-6
brachioradialis function
flexes elbow and pronates forearm to neutral
triceps brachii innervation
radial nerve C6-8
function triceps
elbow extension
supinator muscle
radial nerve posterior interosseous branch C5-6
supinator function
forearm supination
pronator teres muscle innervation
median nerve C6-7, sometimes musck cutaneous n
pronator teres function
pronates and small amount elbow flexion
pronator quadratus innervation
anterior interosseious of median n C6-T1
pronator quadratus function
initiates pronation, stabilizes wrist joint
extensor carpi radialis longus and brevis innervation
radial nerve C6-7
function of ext carpi radialis longus and brevis
wrist extension and abduction (radial deviation)
extensor carpi ulnaris innervation
radial nerve C6-8
ext carpi ulnaris function
extends wrist and adducts hand (ulnar devation)
flexor carpi radialis muscle innervation
median nerve C6-8
flex carp radialis function
flexes wrist and abducts hand, weak flexor and pronator at elbow
palmaris longus innervation
median nerve C7-T1
palmaris longus function
weak flexor at elbow and weak flexor at wrist
flexor carpi ulnaris innervation
ulnar nerve C7-T1
flex carpi ulnaris function
flexes wrist and adducts hand
extensor digitorum muscle innervation
deep branch radial nerve C6-8
ext digitorum muscle function
extends wrist and ALL finger joints
extensor indicis muscle innervation
deep branch of radial nerve C6-8
function of ext indicis muscle
extend index finger also small function to extend wrist
extensor digiti minimi muscle innervation
deep branch radial nerve C6-8
ext digiti minimi muscle function
extension of little finger
extensor pollicis brevis muscle innervation
deep branch radial nerve C6-8
ext pollicus brevis function
extension of proximal joints of thumb
extensor pollicus longus innervation
deep branch radial nerve C6-8
function ext pollicus longus
extension of all thumb joints and abduction of thumb
lumbrical muscles of hand 1-4 innervation
lumb 1-2 median nerve C8-T1
lum 3-4 deep branch ulnar nerve C8-T1
function of lumbricals
flexion of metacarpophalangeal joints II-V, and extend proximal interphalangeal joints
flexor digitorum superficialis innervations
median nerve C7-T1
function flex digitorum superficialis
flexes metacarophalangeal joints II-V and prox interphalangeal joints (same as lumbricals)
flexor digitorum profundus innervation
lateral half is ant interosseous branch median nerve C8-T1
medial half is ulnar nerve C8-T1
function of flexor digitorum profundus
flexes metacarpal joints II-V, the ONLY flexor of DISTAL interphalangeal joints
flexor digiti minimi innervation
deep branch ulnar nerve C8-T1
function flex digiti minimi
flexes metacarpophalangeal joint V
flexor pollicus longus innervation
anterior interosseous branch of median nerve C7-T1
function flexor pollicus long
flexes thumb at all joints, the ONLY flexor in interphalngeal joint of thumb
abductor pollicus longus innervation
deep branch radial nerve C6-8
function adbuctor pollicus longus
extends, abducts and laterally rotates thumb
abductor pollicus brevis innervation
median nerve C7-T1
function abductor pollicus brevis
abducts thumb and extends metacarpal phalangeal joint, extends interphalngeal joint of thumb
abductor digiti minimi muscle of hand innervation
deep branch ulnar nerve C8-T1
function abduct digiti minimi
abducts and bends the 5th finger
DORSAL interosseous muscles of hand 1-4 innervation
deep branch ulnar nerve C8-T1
DORSAL interosseous muscles function
ABducts fingers
PALMAR interosseous muscles innervation
deep branch ulnar nerve C8-T1
PALMAR interosseous muscle function
adducts fingers
adductor pollicis muslce innervation
deep branch ulnar nerve C8-T1
adduct pollicis function
adducts thumb
flexor pollicus brevis innervation
superficial head median nerve C8-T1
deep head ulnar nerve C8-T1
flex pollicus brev function
flexion, abduction and adduction
opponens pollicus innervation
median nerve C7-T1
opponens pollicus function
flexion, abduction, rotation and adduction of thumb
opponens digiti minimi innervation
deep branch ulnar nerve C8-T1
opponens digiti minimi function
flexes and slightly adducts little fingers
palmaris brevis innervation
superficial branch ulnar nerve C7-T1
palmaris brevis function
tenses skin on medial side of palm
