Nerves- Hand Flashcards by Tara Track

retinaculum

expansion of connective tissue like a bracelet on wrist
-keeps wrist tendons attached to the wrist during flexion/extension
-allows tendons to glide without detaching

-there is both a flexor retinaculum + an extensor retinaculum

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palmar aponeurosis

fills each space between both flexor digitorum tendons
-allows grip performance + protective for underlying bones

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radial deviation is the same as

wrist abduction

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ulnar deviation is the same as

wrist adduction

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wrist abduction/radial deviation

spreading fingers 2-5 apart from each other

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wrist adduction/ulnar deviation

closing fingers 2-5 closer together

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movements of the thumb

-abduction/adduction
-flexion/extension
-opposition

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thenar vs hypothenar side of hand

thenar side- thumb side
hypothenar side- pinky side

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KNOW

what carpal bones make up the thenar side

-scaphoid
-trapezium
-trapezoid
-capitate

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KNOW

what carpal bones make up the hypothenar side

-pisiform
-hamate

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intrinsic hand muscles

start within the hand + reach the finger

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extensor hood

-triangle shaped, covers MCP joint
-helps keep extensor close to the bone of the finger
-distributes forces from all the muscles that insert onto this area
-works with interosseous to flex MCP without flexing the fingers

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superficial veins of anterior forearm

-cephanic vein
-basilic vein

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what side is cephalic vein

radial side

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what side is basilic vein

ulnar side

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brachial vein splits into which 2 veins

radial + ulnar veins

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veins of the hand

-cephalic vein (sup)
-basilic vein (sup)
branches into
-superficial arches

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basilic vein branches into

superficial arches

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blood dumps from basilic/cephalic to basilic/cephalic

basilic -> cephalic
(remember blood dumping from veins goes backwards)

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radial + ulnar veins are sup/med/deep

deep

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what does ulnar vein branch to

deep arch

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blood dumps ulnar/radial to ulnar/radial veins

ulnar -> radial
(remember that blood dumps from veins backwards)

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guyon canal location

Study These Flashcards

-on ulnar side,
-between pisiform + hook of hamate

guyon canal content

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-ulnar nerve
-ulnar artery

carpal tunnel location

-in center -between carpal groove + transverse carpal ligament

carpal tunnel content

-median nerve -flexor digitorum profundus -flexor digitorum superficialis -pollicis longus

neurovasculature on ulnar side of hand

-ulnar nerve -ulnar artery

neurovasculature on radial side of hand

-superficial branch of radial nerve -radial artery

neurovasculature in middle of hand

median nerve

ulnar nerve travels with

ulnar artery

superficial radial nerve travels with

radial artery

brachial artery branches to

radial + ulnar arteries

ulnar artery branches to

common interosseous artery

common interosseous artery branches to

posterior + anterior interosseous arteries

in the hand, radial artery branches into

-deep palmar arch -posterior branch

in the hand, ulnar artery branches into

-superficial palmar arch -posterior branch

what arteries supply the posterior branch

both radial + ulnar

# KNOW what artery supplies the deep palmar arch

radial

# KNOW what artery supplies the superficial palmar arch

ulnar

know that the deep palmar arch + superficial palmar arch of the hand connect together

superficial palmar arch is proximal/distal

distal

superficial arch is deep to

palmar aponeuroses

superficial arch is superficial to

-tendon flexor digitorum superficialis -tendon flexor digitorum profundus -lumbricals

deep palmar arch is proximal/distal

proximal -closer to wrist but deeper than the superficial palmar arch

deep palmar arch is deep to

-oblique head of adductor pollicis -tendon flexor digitorum superficialis -tendon flexor digitorum profundus -lumbricals

# KNOW ulnar nerve branches when it reaches the hand

when ulnar nerve reaches hand, has both SENSORY + MOTOR branches (don't need to know specifics)

motor function of ulnar nerve

-abductor digiti minimi -flexor digiti minimi -opponens digiti minimi -adductor pollicis -flexor pollicis brevis (deep head) -lumbricals (3+4) -palmar interossi -dorsal interossi

sensory function of ulnar nerve

common/proper palmar digital -aka anterior/posterior pinky side of hand to 2nd metacarpal (see image)

motor function of median nerve

-abductor pollicis brevis -flexor pollicis brevis (superficial head) -opponens -lumbricals (1+2)

# KNOW median nerve when it reaches the hand

when median nerve reaches the hand, has both SENSORY + MOTOR branches (don't need to know specifics)

sensory function of median nerve

common/proper palmar digital -see image

# KNOW radial nerve when it reaches the hand

when radial nerve reaches the hand, only has sensory branch, called SUPERFICIAL RADIAL NERVE

superficial radial nerve motor function

none

superficial radial nerve sensory function

see image -only posterior side of hand, digits 1-3 excluding fingertips

see image of hand sensory innervation on notability

Nerves- Hand Flashcards

(55 cards)