Hand Flashcards
List the groups of intrinsic muscles of the hand
Thenar Hypothenar Lumbricals Interossei Palmaris brevis Adductor pollicis
List the thenar muscles of the hand
Opponens pollicis
Abductor pollicis brevis
Flexor pollicis brevis
Which movements does opponens pollicis enable?
Thumb: flexion at CMJ (opposition)
Which movements does abductor pollicis brevis enable?
Thumb: abduction, opposition, extension
Which movements does flexor pollicis brevis enable?
Thumb: flexion
What is the main nerve supply to the thenar muscles?
Median nerve
List the hypothenar muscles of the hand
Opponens digiti minimi
Abductor digiti minimi
Flexor digiti minimi brevis
Which movements does opponens digit minimi enable?
Little finger: rotation, opposition
Which movements does abductor digiti minimi enable?
Little finger: abduction
Which movements does flexor digiti minimi enable?
Little finger: flexion
What is the main nerve supply to the hypothenar muscles?
Ulnar nerve
How many lumbrical muscles are in the hand?
4 (one for each finger)
What is the nerve supply to the lumbricals?
Median nerve (1-2) UInar nerve (3-4)
Which movements do the lumbricals enable?
MCPJ: flexion
IPJ: extension
How many interossei muscles are in the hand?
7
4 dorsal, 3 palmar
What is the nerve supply to the interossei?
Ulnar nerve
Which movements do the interoessei enable?
Dorsal interossei: abduction at MCPJ
Palmar interossei: adduction at MCPJ
(PAd DAb)
What is the nerve supply to palmaris brevis?
Ulnar nerve
Which movements does palmaris brevis enable?
Hand: improve grip
What is the nerve supply to adductor pollicis?
Ulnar nerve
Which movements does adductor pollicis enable?
Thumb: adduction
A useful mnemonic for the thenar + hypothenar hand muscles:
All For One And One For All
HYPOTHENAR: Abductor digiti minimi Flexor digiti minimi brevis Opponense digiti minimi (DEEP) Adductor pollicis
THENAR:
Opponens pollicis
Flexor pollicis brevis
Abductor pollicis brevis
What bone movement occurs in pronation?
Radius moves over ulna
What type of joint is the radiocarpal joint?
Elipsoid joint
The radial artery contributes to the deep/superficial palmar arch
Deep
The ulnar artery contributes to the deep/superficial palmar arch
Superficial
What is the lymph drainage of the upper limb?
Cubital and axillary nodes
What is the most common carpal bone fracture? This leads to pain in the…
Anatomical snuffbox
Carpal tunnel syndrome involves compression of the…
This leads to weakness in which muscles?
Median nerve
Thenar muscles
Cubital tunnel syndrome involves compression of the…
Ulnar nerve
What movements do the interrosei enable?
Dorsal abduct digits (DAB)
Palmar adduct digits (PAD)
What intrinsic hand muscles does the median nerve supply?
LOAF Lateral 2 lumbricals Opponens pollicis Abductor pollicis brevis Flexor pollicis brevis (All rest are ulnar)
Dupuytren’s contracture involves thickening of the…
Palmar fascia
What is the function of the flexor tendon sheaths?
Reduce friction in tendons via synovial covering
What is trigger finger? How is it tested for?
Nodule rubs on A1 pully
Patient can’t make fist (cant fully extend digits)
Boutinniere deformity involves what movement at the PIP and DIP joints, respectively?
Flexion
Hyperextension
Swan neck deformity involves what movement at the PIP and DIP joints, respectively?
Hyperextension
Flexion
