Hand Flashcards
Which muscle of the forearm (not found in everyone) is continuous with the fascia of the palm shown above?
Palmaris Longus
How many muscle compartments of hand
5
What are the superficial to deep hand muscle compartments
Thenar Hypothenar Lumbricals and Long Flexor Tendons Adductors Interosseous
The thenar muscles form fleshy muscle belly where?
Lateral Aspect of Palm
The Thenar Muscles are composed of how many muscles
3
Name the thenar muscles
Abductor Pollicis Brevis
Flexor Pollicis Brevis
Opponens Pollicis
The nerve supply for thenar eminence is derived from
Median Nerve
The deep belly of Flexor Pollicis Brevis is supplied by
Ulnar Nerve
Which nerve segment from the brachial plexus serves to provide the majority of the innervation to the thenar muscles ?
Median C6-T1
The hypothenar muscles form the fleshy muscle belly on the
lateral aspect of palm
The hypothenar muscles form the fleshy muscle belly on the
lateral aspect of palm
Name the 3 Hypothenar Muscles
Abductor Digiti Minimi
Flexor Digiti Minimi
Opponens Digiti Minimi
Which nerve innervates hypothenar muscles
Ulnar
Which nerve root from the brachial plexus serves to provide the majority of the innervation to the hypothenar muscles?
C8-T1
What lies deep to thenar and hypothenar eminence
central compartment
The central compartment of the hand includes
Flexor Digitorum Profundus
Flexor Digititorum Superficialis
Flexor Pollicis Longus
Lumbricals
How many lumbricals in hand are there
4
The lumbricals arise from
medial and lateral aspects of the FDP tendon, between the 1st to 5th metacarpals
The lumbricals action
flex the fingers at the metacarpophalangeal joints and extend the interphalangeal joint of 2nd to 5th digits.
The medial two lumbricals are innervated by
ulnar nerve
The lateral two lumbricals are innervated by
median nerve
How many heads does adductor pollicis in hand have
2
contraction of adductor pollicis action
adducts thumb
which nerve innervates adductor pollicis
ulnar nerve
Which muscles are deepest in hand and lie between metacarpal bones
Interossei (4 Dorsal and 3 Palmar)
Dorsal Interossei of hand action
Abduct Fingers
Palmar Interossei action
Adduct fingers
which nerve innervates dorsal and palmar interossei muscles
ulnar nerve
which spinal segment contributes most to innervation of interossei
C8-T1
which spinal segment contributes most to innervation of interossei
C8-T1
which arteries provide blood supply to hand
ulnar and radial arteries
when ulnar and radial arteries reach palm they form the
superficial and deep palmar arch
which artery is main contributor of superficial palmar arch
Ulnar
which artery is main contributor of deep palmar arch
radial
which nerves supply the muscles of hand
Median and Ulnar Nerves
The median nerve enters hand through
Cubital Fossa
The median nerve in hand supplies
majority of thenar eminence apart from deep belly of flexor pollicis brevis and 1st and 2nd
Ulnar nerve innervates
intrinsic muscles of hand
Median and ulnar nerves carry fibres of
C6 and T1
The ulnar nerve is a branch of which cord of the brachial plexus?
Medial
