Palm of the Hand UE4 Flashcards
carpals (proximal row)
- scaphoid
- lunate
- triquetrum
- pisiform
carpals (distal row)
- trapezium
- trapezoid
- capitate
- hamate
metacarpophalangeal (MCP) joints
- condyloid
- flexion, extension, abduction, and adduction
interphalangeal joints
- proximal (PIP)
- distal (DIP)
- Hinge joint
- flexion/extension
extrinsic muscles
- located in the anterior and posterior compartments of the forearm
~ they control crude movements and produce forceful grip
intrinsic muscles
- of the hand are located within the hand itself
~ responsible for the fine motor movements (writing, typing, etc.)
thenar compartment
- abductor pollicis brevis
- flexor pollicis brevis
- opponens pollicis
adductor compartment
adductor pollicis
hypothenar compartment
- abductor digiti minimi
- flexor digiti minimi brevis
- opponens digiti minimi
lumbricals (central compartment)
1-4 and associated with the long flexor tendons
interossei
located between the metacarpals
palmar aponeurosis
- thickened fascia
- provides a barrier between skin and underlying neurovascular structures
palmaris brevis
cuts the hand
dupuytren’s contracture
Dupuytren’s contracture results from thickening and shortening of the palmar aponeurosis, causing the digits to flex at the MCP and PIP joints.
1st (superficial) layer of muscles of the palm of the hand
- thenar compartment
- hypothenar compartment
2nd layer of muscles of palm of hand
- lumbicals 1,2
- lumbricals 3,4
lumbicals 1,2
innervated by median nerve
lumbricals 3,4
innervated by ulnar nerve
the 2nd layer of muscles in the palm of the hand has a proximal attachment to?
flexor digitorum profundus
the 2nd layers of muscles in the palm of the hand has a distal attachment to?
extensor expansions of digits 2-5
3rd layer of muscles in the palm of the hand
- opponens digiti minimi
- adductor pollicis
- opponens pollicis
4th (deepest) layer of the muscles in the palm of the hand
- 3 palmar interosseous muscles
- 4 dorsal interosseous muscles
arteries of the palm of the hand
- ulnar and radial arteries
ulnar and radial arteries supply?
- the palm of the hand
~ branches from both vessels anastomose to make superficial palmar and deep palmar arches
median nerve
- enters the hand through carpal tunnel
- recurrent branch of median nerve (motor)
~3 thenar muscles
palmar branches of median nerve
~lateral 2 lumbricals
- sensory to lateral 3 1/2 digits
ulnar nerve
- superficial branch (sensory)
- deep branch (motor)
