The Hand Flashcards
(20 cards)
Which muscle of the forearm is continuous with the fascia of the palm shown above?
Palmaris longus
What are the 3 thenar muscles?
Abductor pollicis brevis
Flexor pollicis brevis
Opponens pollicis
Which nerve segment from the brachial plexus provides most of the innervation to the thenar muscles?
T1 segment
Recurrent branch of median nerve
Where do the hypothenar muscles lie?
Fleshy muscle belly on lateral aspect of the palm
What are the 3 hypothenar muscles?
Abductor digiti minimi
Flexor digiti minimi
Opponens digiti minimi
Which nerve innervates the hypothenar muscles?
Ulnar nerve
What 3 long flexor tendons lie in the central compartment?
Digitorum superficialis
Digitorum profundus
Flexor pollicis longus
What is the function of the lumbricals?
Flex the fingers at the MC joint
Extend the IP joints of digits 2-5
What nerve innervates the medial 2 lumbricals?
Ulnar nerve
What nerve innervates the lateral 2 lumbricals?
Medial nerve
Which nerve innervates adductor pollicis?
Ulnar nerve - Deep branch
Which nerve innervates the dorsal and palmar interossei muscles?
Ulnar nerve
Which spinal segment contributes the most to the innervation of the interossei?
T1
Which artery is the main contributor of superficial palmar arch?
Ulnar artery
Which artery is the main contributor of the deep palmar arch?
Radial artery
Which cord of the brachial plexus is the ulnar nerve a branch of?
Medial
What sits between the ulna and carpal bones?
Triangular fibrocartilage complex
What carpal bones does the radius articulate with?
Scaphoid and lunate
What type of fluid is found between the forearm and carpal bones?
Synovial fluid
What muscles are responsible for radial deviation or abduction of the wrist?
Flexor carpi radialis
Extensor carpi radialis
