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Anatomy Hand
KYCOM Block 4
117
Anatomy
Graduate
11/24/2012

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Term
what type of skin does the palm of the hand have, how is it arranged and bound
Definition
thick skin bound to deep fascia by numerous fibrous bands
Term
what is the palmaris brevis, where is it located
Definition
small superificial muscle over the hyposthenia eminence
Term
what is the origin of the palmaris brevis
Definition
flexor retinaculum and palmar aponeurosis
Term
what is the insertion of the palmaris brevis
Definition
skin of medial border of palm
Term
what is the innervation of the palmaris brevis
Definition
superificial branch of ulnar nerve
Term
what is the action of the palmaris brevis
Definition
corrugates skin of hyposthenia eminence to improve grip of palm
Term
where is the deep fascia of the palm most thin
Definition
over the thenar and hyposthenia eminences
Term
where is the deep fascia of the palm the thickest
Definition
over central area, palmer aopneurosis
Term
what shape is the palmar aponeurosis
Definition
triangular
Term
where is the apex of the palmar aponeurosis directed
Definition
proximally to the flexor retinaculum
Term
what inserts into the palmar aponeurosis
Definition
palmaris longus tendon
Term
how is the base of the palmar aponeurosis directed
Definition
distally at finger bases, divided into 4 slips
Term
what is the base of the palmar aponeurosis continous with
Definition
fibrous flexor sheaths
Term
where do the fibrous flexor sheaths extend to and from
Definition
metacarpal heads to base of distal phalanges
Term
where do flexor sheaths attach
Definition
to sides of phalanges
Term
what do flexor sheaths arch over
Definition
long flexor tendons
Term
how are blind osteofibrous tunnels formed
Definition
fibrous sheaths with anterior surface of phalanges and interphalangeal joints
Term
what runs through the blind osteofibrous tunnels
Definition
flexor tendons and synovial sheaths
Term
what is in the osteofibrous tunner of the thumb
Definition
tendon of the flexor pollics longus
Term
what is in the osteofibrous tunnels of the 4 fingers
Definition
tendons of the flexor digitorum superificials and profundus
Term
what are the short muscles of the thumb
Definition
abductor pollicis brevis, flexor pollicis brevis, opponens pollicis, adductor pollicis
Term
what form the thenar eminence
Definition
abductor pollicis brevis, flexor pollicis brevis, opponens pollicis
Term
where is the abductor pollicis brevis located in relation to the thenar eminence
Definition
superificial and lateral to it
Term
what is the origin of the abductor pollicis brevis
Definition
scaphoid, trapezium, and flexor retinaculum
Term
what is the insertion of the abductor pollicis brevis
Definition
lateral aspect of base of proximal phalanx of thumb
Term
what is the innervation of the abductor pollicis brevis
Definition
recurrent branch of the median nerve
Term
what is the action of the abductor pollicis brevis
Definition
abduction of the thumb at the carpometacarpal and metacarpophalangeal joints
Term
where is the flexor pollicis brevis located in relation fo the abductor pollicis brevis
Definition
medial to it
Term
what is the origin of the flexor pollicis brevis
Definition
flexor reginaculum and trapezium
Term
what is the insertion of the flexor pollicis brevis
Definition
lateral base of proximal phalanx of thumb forming a common tendon with abductor pollicus brevis
Term
what is in the common tendon of the abductor pollicus brevis and flexor pollicis brevis
Definition
sesamoid bone
Term
what is the innervation of the flexor pollicis brevis
Definition
recurrent branch of median nerve
Term
what is the action of the flexor pollicis brevis
Definition
flexion of the thumb at the carpometacarpal and metacarpophyalangeal joints
Term
where is the opponens pollicis located in relation to the abductor pollicis brevis
Definition
deep to it
Term
what is the origin of the opponens pollicis
Definition
flexor retinaculum and trapezium
Term
what is the insertion of the opponens pollicis
Definition
lateral border of shaft of 1st metacarpal
Term
what is the innervation of the opponens pollicis
Definition
recurrent branch of median nerve
Term
what is the action of the opponens pollicis
Definition
opposition of the thumb
Term
what is the origin of the the oblique head of the adductor pollicis
Definition
base of metacarpal 2-3 and adjacent carpal bones
Term
what is the origin of the transverse head of the adductor pollicis
Definition
shaft of 3rd metacarpal
Term
what is the insertion of the adductor pollicis
Definition
medial aspect of base of proximal phalanx of thumb
Term
what is in the tendon of the adductor pollicis
Definition
small sesmoid bone
Term
what is the innervation of the adductor pollicis
Definition
deep branch of the ulnar nerve
Term
what is the action of the adductor pollicis
Definition
adduction of the thumb at the carpometacarpal and metacarpophalangeal joints
Term
what are the short muscles of the little finger
Definition
abductor digiti minimi, flexor digiti minimi brevis, oppnenes digiti minimi
Term
what forms the hyposthenia eminence
Definition
abductor digiti minimi, flexor digiti minimi brevis, oppnenes digiti minimi
Term
what are the short muscles of the little finger innervated by
Definition
deep branch of ulnar nerve
Term
where is the abductor digiti minimi located within the hyposthenia eminence
Definition
superificial and medial
Term
what is the origin of the abductor digiti minimi
Definition
pisiform bone
Term
what is the insertion of the abductor digiti minimi
Definition
medial side of the base of the proximal phalanx of the little finger
Term
what is the action of the abductor digiti minimi
Definition
abduction of the little finger at the matacaopophalangeal joint
Term
what is the location of the flexor digit minimi brevis in reference to the abductor digiti minimi
Definition
lateral to it
Term
what is the origin of the flexor digit minimi brevis
Definition
flexor retinaculum and hook of hamate
Term
what is the insertion of the flexor digiti minimi brevis
Definition
medial side of base of proximal phalanx of little finger
Term
what is the action og the flexor digit minimi brevis
Definition
flexion of the little finger at the matacaopophalangeal joint
Term
where is the opponens digiti minimi located in the hyposthenia eminence
Definition
deep
Term
what is the origin of the opponens digiti minimi
Definition
flexor retinaculum and hook of hamate
Term
what is the insertion of the opponens digiti minimi
Definition
medial border of the shaft of metacarpal 5
Term
what is the action of the opponens digiti minimi
Definition
flexion and lateral rotation of the 5th metacarpal at caropmetacarpal joint, helps bring little finger into opposition with the thumb
Term
what are the small muscles of the hand
Definition
4 lumbricalis, 3 palmer interossei, 4 dorsal interossei
Term
what do the lumbrical muscles act on
Definition
2-5 fingers
Term
what is the origin of the lumbrical muscles
Definition
tedons of the flexor digitorum profundus
Term
what is the insertion of the lumbrical muscles
Definition
lateral extensor expansion of the corresponding finger
Term
what is the innervation of the lumbrical muscles
Definition
1-2: median nerve
3-4 deep branch of ulnar nerve
Term
what is the action of the lumbrical muscles
Definition
flexion at metacarpophalangeal joints, extension of the interphalangeal joints
Term
what do the palmar interossei muscles act on
Definition
adduction of the index, ring, and little fingers
Term
what is the origin of the palmar interossei
Definition
metacarpal of corresponding finger
Term
what is the insertion of the first palmar interossei
Definition
medial side of base of proximal phalanx of index finger and extensor expansion
Term
what is the insertion of the 2nd and 3rd palmar interossei
Definition
lateral side of base of proximal phalanx of ring and little finger and extensor expansions
Term
what is the innervation of the palmar interossei
Definition
deep branch of ulnar nerve
Term
what is the action of the palmar interossei
Definition
adduction of the metacarpophalangeal joints, flexion at metacarpophalangeal joints, extension at interphalangeal joints
Term
what do the dorsal interossei do in general
Definition
abduction of the dingers
Term
what does the dorsal interossei act on
Definition
index, middle (2 muscles), and ring fingers
Term
what is the origin of the dorsal interossei
Definition
two heads form adjacent sides of two consecutive metacarpal bones
Term
what is the insertion of the first dorsal interossei
Definition
lateral side of base of proximal phalanx of index finger, extensor expansion of finger
Term
what is the insertion of the 2nd and 3rd dorsal interossei
Definition
both sides of base of proximal phalanx of middle finger, extensor expansion of finger
Term
what is the insertion of the 4th dorsal interossei
Definition
medial side of base of proximal phalanx of ring finger, extensor expansion of finger
Term
what is the innervation of the dorsal interossei
Definition
deep branch of ulnar nerve
Term
what is the action of the dorsal interossei
Definition
abduction at metacarpophalangeal joints, flexion at metacapophalangeal joints, extension at interphalangeal joints
Term
where does the ulnar artery enter the hand
Definition
superificial to the flexor retinaculum
Term
what are the branches of the ulnar artery in the hand
Definition
deep palmar branch, superificial palmar arch
Term
describe the path of the superificial palmar arch
Definition
cruves laterally and deep to palmar aponeurosis and superificial to long flexor tendons
Term
what is the superificial palmar arch joined by
Definition
superificial palmar branch of radial artery
Term
where branches does the superificial palmar arch have
Definition
palmar digital arteries
Term
what do the palmar digital arteries supply
Definition
medial side of index finger and both sides of middle, ring, and little fingers
Term
where does the radial artery leave the dorsum of the hand
Definition
between two heads of the 1st dorsal interosseous, between two heads of adductor pollicis then to deep palmar arch
Term
as the radial artery enters the palmar arch, what does it give off
Definition
digital branches for the thumb and lateral index finger
Term
describe the path of the deep palmar arch
Definition
curves medial and deep to the long flexor tendons
Term
what is the deep palmar arch joined by
Definition
deep palmar branch of the ulnar artery
Term
what branches does the deep palmar arch gibe off
Definition
palmar matacrapal arteries
Term
what do the palmar metacarpal arteries join
Definition
palmar digital branches of the superificial palmar arch
Term
where does the median nerve enter the palm
Definition
carpal tunner
Term
what does the recurrent branch of the median nerve innervate
Definition
3 muscles of the thenar eminence, 1-2 lumbrical muscles
Term
what do the cutanous branches of the median nerve form
Definition
palmar digital branches
Term
what do the palmar digital branches of the median nerve innervate
Definition
palmar aspect of the lateral 3.5 fingers and distal part of dorsal aspect of same fingers
Term
where does the ulnar nerve enter the hand
Definition
anterior to the flexor retinaculum
Term
what does the ulnar nerve do right when it enters the hand
Definition
divides into superificial and deep branches
Term
what does the superificial branch of the ulnar nerve innervate
Definition
palmaris brevis
Term
what does the cuteneous branch of the ulnar nerve innervate
Definition
palmar aspect of medial 1.5 fingers and distal part of the dorsal aspect of the same fingers
Term
what are the cutaneous branches of the ulnar nerve called
Definition
palmar digital branches
Term
what does the deep branch of the ulnar nerve pass between
Definition
abductor digit minimi and flexor digit minimi
Term
what does the deep branch of the ulnar nerve pierce
Definition
opponents digiti minimi
Term
what happens after the deep branch of the ulnar nerve pierces opponents digiti minimi
Definition
it curves around hook of hamate and passes lateral within concavity of deep palmar arch
Term
what does the deep palmar nerve innervate
Definition
3 hyposthenia muscles, all interossei palmar and dorsal, 3-4 lumbrical muscles, adductor pollicis
Term
what provides cutaneous innervation to the lateral 2/3 of the dorsum of the hand
Definition
superificial branch of radial nerve
Term
what supplies cutanrous innervation to the dorsal aspect of the lateral 3.5 fingers
Definition
dorsal digital branch of superificial branch of radial nerve
Term
what supplies cutaneous innervation to the medial 1/3 of the dorsum of the hand
Definition
dorsal cutaneous branch of unlar nerve
Term
what supplies cutanrous innervation to the dorsal part of the medial 1.5 fingers
Definition
dorsal digital branch of the dorsal cutanrous branch of the ulnar nerve
Term
where do the dorsal digital branches of nerves end
Definition
not far beyond the proximal phalanges
Term
what is the remainder of the dorsal aspect of each finger innervated by
Definition
palmar digital branches
Term
what is the dorsal venous arch within
Definition
subcutanous tissue of the dorsum of the hand
Term
where is the dorsal venous arch located
Definition
proximal to the metacapophalangeal joints
Term
where does the dorsal venous arch drain
Definition
on lateral side into cephalic vein and medial side into basilic vein
Term
where do seasmoid bones form
Definition
in tendons in areas of stress
Term
what are examples of locations of seizmoid bones
Definition
patella, on thumb
Term
where is the hypothenar eminence located
Definition
palm on pinkey side
Term
where is the thenar eminence located
Definition
palm under thumb
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