Palm of hand Flashcards
proximal row of carpal bones (lateral-medial)
scaphoid
lunate
triquetrum
pisiform
distal row of carpal bones (lat-med)
trapezium
trapezoid
capitate
hamate
carpal tunnel
allows passage of the flexor tendons and median nerve into the palm of the hand
flexor retinaculum
attaches medially to the perform and hook of the hamate, laterally to the trapezium and scaphoid
Palmar aponeurosis
Extends from a flexor retinaculum to the head of the metacarpals to the head of the metacarpals,
where it divides into the four longitudinal bands, adhearing the fibrous tissue of the proximal phalanges
FDS and FDP tendons
enter in common synovial sheath deep to the flexor retinaculum, and Palmar aponeurosis
enter Osseofibrous, digital tunnels in a synovial membrane covers tendons within the tunnel
Tunnels are composed of fibrous, connective tissue, which serve to hold the tendons onto the phalanges
synovial sheaths of fingers
digits 1 and 5 synovial sheets that are continuous with a synovial sheets of the palm
Digits 2 3 and 4 terminate about the middle of the palm and are not continuous with a synovial sheets of a palm
Thenar muscles
abductor pollicis brevis
Flexor pollicis brevis
Opponens pollicis
abductor pollicis brevis
O- flexor retinaculum scaphoid and trapezium
I- lateral side of the base of the proximal phalanx
N- recurrent branch of the median nerve (C8, T1)
A- abducts thumb at CMC joint
flexor pollicis brevis
O- flexor retinaculum and trapezium
I- lateral side of base of proximal phalanx
N- recurrent branch of medium n (C8, T1)
A- flex thumb
opponens pollicis
O- flexor retinaculum and trapezium
I- lateral side of the first metacarpal
N- recurrent branch of median nerve (C8, T1)
A- opposes thumb
hypothenar muscles
abductor digiti minimi
Flexor digiti minimi brevis
Opponents digiti minimi
abductor digiti minimi
O- pisiform
I- base of proximal phalanx of a fifth digit
N- deep branch of the ulnar nerve (C8, T1)
A- abduction
Flexor digiti minimi brevis
O- hamate
I- base of the proximal phalanx of the fifth digit
N- the branch of the ulnar nerve (C8, T1)
A- flexes fifth digit
opponens digiti Minimi
O- hamate
I- medial border of fifth metacarpal
N- deep branch of the owner nerve (C8, T1)
A- oppose the fifth digit
Adductor pollicis
oblique head
O- carpal bones and bases of metacarpals two and three
Transverse head
O- shaft of the third metacarpal
I- base of the proximal phalanx of thumb
N- ulnar nerve
A- adduct thumb
lumbricals
mid Palmar muscles
O- tendons of the FDP
I- lateral side of the extensor expansions
N- lumbricals 1-2 median nerve
Lumbricals 3-4 deep branch of ulnar nerve
A- flex the MP joints and extend the proximal IP joints
Palmar interossei
Three
O- sides of the metacarpal bones
I- base of the proximal phalanges and extensor expansion
N- deep branch of ulnar nerve
A- adduct fingers
dorsal interossei
four
O- arise via two heads from adjacent sides of metacarpals between which they lie
I- proximal phalanges and extensive expansion
N- deep branch of ulnar nerve
A- abduct fingers at MP joints
median nerve of the hand
Enters through carpal tunnel
Supplies motor input to the three thenar muscles and lumbricals one and two
Supply sensory information-
the anterior surface of the digits 12 and 3 and lateral half of digit 4
lateral surface of the palm of the hand
ulnar nerve in hand
enters palm on medial side of the wrist through the canal of guyon
supplies motor input
adductor pollicis, lumbricals three and four, and the Palmar and dorsal interossei muscles
sensory information
Medial aspect of palm
Medial aspect of dorsum of the hand
Digits 5 and half of digit 4
Radial nerve in hand
enters hand through anatomical snuffbox
Supplies no motor control of the muscles in the hand.
Supply sensory information from the lateral 2/3 of the dorsum of the hand, via the superficial radial branch
radial artery
Rins posterior to first digit through the anatomical snuffbox
Enters palm between the heads of the first dorsal interosseous muscles
Gives rise to the princeps pollicis artery, the radialis indicis artery, and forms, the deep Palmar arch
Superficial radial branch- arises from the radial artery before the radial artery enters the anatomical snuffbox, it runs, superficial and joints with a superficial Palmar arch
Princeps pollicis artery
Supplies first digit
Radialis indicis Artery
Supplies second digit
ulnar artery
enters palm through the canal of guyon
Divide into a deep Palmer branch, and superficial Palmer branch which form superficial and deep Palmer arches
Digital arteries
Three digital arteries, arise from the superficial and deep Palmar arch
