Hand Flashcards
Palmar aponeurosis blends
palmar carpal ligament
palmaris longus tendon
Fibrous digital sheath is composed of …
annular and cruciform parts
Fibrous digital sheath anchors … to each phalanx in synovial sheath in between.
flexor tendons
Flexor retinaculum is a dense connective tissue band that bridges between tubercle of the … and …
trapezium and pisiform plus hook of hamate
Flexor retinaculum forms the roof of …
carpal tunnel
Intrinsic muscles of the hand
thenar hypothenar central adductor interosseous
Palmar brevis is a superficial muscle that is not ….
in the hypothenar compartment
The thenar muscles form the … and the chief function is… how many muscles are in it?
thenar eminence
opposition of the thumb
3
Which muscle abducts the carpometacarpal joint of the thumb and assists in early opposition?
abductor pollicis brevis
What muscle flexes the carpometacarpal, metacarpophalangeal joints of the thumb?
flexor pollicis brevis
What nerve innervates the flexor pollicis brevis?
median
What muscle flexes and medially rotates the first metacarpal bone?
opponens pollicis
What muscle abducts the 5th digit and helps flex the proximal phalanx of the 5th digit?
abductor digit minimi
What muscle flexes the 5th digit at the metacarpophalangeal joint?
flexor digiti minimi brevis
What muscle flexes and laterally rorates the 5th metacarpal bone for opposition action?
opponens digti minimi
All hypothenar muscles are innervated by the …
ulnar nerve
All thenar muscles are innervated by the…
median nerve
Lumbricals for 2nd and 3rd finger innervated by … nerve. Lumbricals for 4th and 5th finger are innervated by…
median
ulnar
Adductor pollicis are innervated by the …nerve.
ulnar
Dorsal interossei muscles are innervated by..
ulnar nerve
Palmar interossei muscles are innervated by the…
ulnar nerve
Thenar muscles
APB
FPB
Opponens pollicis
Hypothenar muscles
ADM
FDM
ODM
Central muscles
lumbricals
Adductor muscles
adductor pollicis
Interosseous muscles
PAD
DAB
Tenosynovitis is …
infection of the synovial sheath
De Quervains tenovaginitis stenosans
excessive friction of abductor pollicis longus and extensor pollicis brevis that causes a thickening of the synovial sheath.
How to test De Quervains tenovaginitis stenosans?
hold thumb inside the other four fingers and adduct wrist joint
Superficial palmar arch has ..
common palmar digital arteries
proper palmar digital arteries
Deep palmar arch has…
palmar metacarpal arteries
common palmar digital arteries
Superficial palmar arch is mainly formed by the…
ulnar artery
The deep palmar arch is formed mainly by the
radial artery
Each finger has … digital arteries
4
Carpal tunnel is a passageway deep to the flexor retinaculum between the … and …
tubercles of the scaphoid and trapezium on the lateral side and the pisiform and hook of hamate on the medial side
There are … tendons passing through the carpal tunnel.
nine
Which nerve passes through the carpal tunnel?
median
Median nerve supplies… muscles and … lumbricals.
three thenar
1st and 2nd
Symptoms of carpal tunnel syndrome
muscle weakness resulting in difficulty or incapability of opposing the thumb
Ulnar nerve injury appearance
clawhand
Guyons canal neuropathy affects
interosseus muscles (DAB, PAD) and adductor pollicis muscle
Ulnar nerve innervates
interosseous muscles
3rd and 4th lumbricals
hypothenar muscles
adductor pollicis muscle
Radial has …. intrinsic hand muscle innervation.
no
Most thumb movements are performed by … nerve.
What nerve performs extension and aids in abduction?
median
radial
