Upper Limb 3 - Station 1 Flashcards
3 layers of the anterior forearm muscles
superficial, middle/intermediate and deep
superficial anterior forearm muscles
flexor carpi radialis, flexor carpi ulnaris, palmaris longus and pronator teres
common origin of all superficial anterior forearm muscles
medial epicondyle
action of pronator teres
pronation and flexion of wrist
innervation of pronator teres
median nerve
action of flexor carpi ulnaris
wrist flexion and adduction
innervation of flexor carpi ulnaris
ulnar
action of flexor carpi radialis
wrist flexion and abduction
innervation of flexor carpi radialis
median
action of palmaris longus
flexes wrist and tenses palmar aponeurosis
innervation of palmaris longus
median
which muscles tendon can be seen protuding in the wrist and is not present in 10% of the population
palmaris longus
order that the superficial anterior forearm muscles go in from medial to lateral
flexor carpi ulnaris –> palmaris longus –> flexor carpi radialis –> pronator teres
is the brachioradialis anterior or posterior forearm compartment
posterior
action of brachioradialis
flexion of the elbow strongest in the midprone position
innervation of brachioradialis
radial
how is the brachioradialis an exception
because breaks the generalisation that the radial nerve supplies only extensors and that all flexors are in the anterior compartment
intermediate muscles of the anterior forearm
flexor digitorum superficialis (FDS)
how many tendons does the flexor digitorum superficialis have and where do they attach
4 attaching to the middle phalanges of the medial 4 fingers
innervation of the flexor digitorum superficialis
median nerve
deep muscles of the anterior forearm
flexor digitorum profundus, flexor pollicis longus and pronator quadratus
all muscles of the anterior forearm (from out to in)
flexor carpi ulnaris palmaris longus flexor carpi radialis pronator teres flexor digitorum superficialis flexor digitorum profundus flexor pollicis longus pronator quadratus
action of the flexor digitorum profundus
flexes wrist and DIP joints of medial four fingers
action of the flexor digitorum superficialis
flex wrist and PIP joints of medial four fingers
which flexor digitorum is responsible for flexion at the distal interphalangeal joints
flexor digitorum profundus
innervation of flexor digitorum profundus
medial half –> ulnar
lateral half –> median
action of flexor pollicis longus
flexion of wrist and thumb IP joint
innervation of flexor pollicis longus
median nerve (anterior interosseus nerve)
action of pronator quadratus
pronate forearm
innervation of pronator quadratus
median nerve (anterior interosseus nerve)
which forearm muscles are innervated by the anterior interosseus branch of the median nerve
pronator quadratus, flexor pollicis longus and lateral part of the flexor digitorum profundus
only two anterior forearm muscles not to be innervated by the median nerve
flexor carpi ulnaris and medial part of flexor digitorum profundus
which forearm muscles has split innervation
flexor digitorum profundus
