Forearm and Dorsum of Hand UE3 Flashcards
cubital fossa
- triangular area on the anterior surface of the elbow
boundaries:
~ medially by the pronator teres
~ laterally by the brachioradialis
~ superiorly by an imaginary line b/n lateral and medial epicondyles
cubital fossa contents
- biceps tendon
-brachial artery
-median nerve
-brahcial veins
ulnar artery
- palpated on the lateral side of the FCU tendon
- gives the common interosseous artery
radial artery
palpated through the forearm
recurrent arteries participate?
in the anastomosis around the elbow
what side do the anterior and posterior interosseous arteries travel on?
interosseous membrane
median nerve
- lateral aspect of palm of hand and lateral 3 1/2 digits
- tips of lateral 3 fingers on dorsum of hand
median nerve motor supply?
- most anterior forearm muscles
- most thenar muscles in the hand
- lumbricals 1 and 2
ulnar nerve supply
- flexor carpl ulnaris
- medial 1 1/2 of flexor digitiorum profundus
- hypothenar muscles
- all intrinsic hand muscles except those innervated by median n
ulnar nerve sensory distribution
- medial aspect of palm and dorsum of hand
- palmar and dorsal aspects of 1 ½ digits
radial nerve
- the radial nerve supplies the
extensor (posterior) compartment - travels between the brachialis and
brachioradialis to emerge in the
forearm - deep (motor) and superficial
(sensory) branches - sensory distribution is shown in
the image on the right.
wrist joint
- radiocarpal articulation
metacarpophalangeal (MCP) joints
condyloid
interphalangeral joints (IP)
- hinge joints (synovial)
- proximal (PIP)
- distal (DIP)
movements of the wrist
- flexion
- extension
- abduction (radial deviation)
- adduction (ulnar deviation)
- pronation
- supination
movements of the fingers
- extension
- flexion
abduction of the wrist (radial deviation) involves?
synergistic activity of the flexor carpi radialis and the extensor carpi radialis brevis and longus
adduction (ulnar deviation) involves?
synergistic activity of the flexor carpi ulnaris and the extensor carpi ulanris
superficial anterior muscles of forearm
- flexor carpi radialis
- flexor carpi ulnaris
- pronator teres
- palmaris longus
intermediate anterior forearm muscles
flexor digitorum superficialis
if you want abduction to take place what do you need?
you need extensor carpi muscles working together with flexor carpi radialis muscles
deep anterior forearm muscles
- flexor digitorum profundus
- flexor pollicis longus
- pronator quadratus
flexor digitorum flexes where?
wrist, MCP, PIP, DIP
