arm Flashcards
muscles in the anterior compartment of arm
coracobrachialis
brachialis
biceps
coracobrahachilas
insert halfway down the medial side of humerus
innervation- muscultaneous nerve
action - adductor
what are the anterior compartment of the arm muscles innervated by
musculotaneous nerves
brachialis (drinking)
origin- flat side of distal humerus
insertion- tubercle of the ulna
innervation- muscultaneous nerve
action- flexor
biceps
origin - two beacuse 2 heads
long head- supragleniod tubercle
short head - coracoid process
insertion - radial tubercle
action- flex
innervation- muscultaneous nerve
what is part of the posterior compartment of the arm
triceps (brachii)
triceps
3 heads
insertion on the olecranon of the ulna
innervation- radial nerve
action- extensor
bones of the forearm
radius and ulna
how many carpal bones are there
8
proximal row of carpal bones
pisiform, triquetral,lunate,scaphoid
distal row of carpal bones
hammate,capatate,trapeziod,trapezium
how do you remeber metacarpal bones
silly lovers try positions - proximal
that they cant handle - distal
moving laterally to medial
where are the metacarpal bones
palm of the hand
what are the groups of the anterior forearm muscles
superfical
intermediate
deep
what is interosseous membrane
membrane between the bones
what is the CFO
common flexor origin
medial epicondyle & supracondylar ridge of humerus
how many muscles are in the superficial group of forearm muscles and how do you remember them
4, PASS FAIL PASS FAIL
what are the pass fail muscles
PASS - Pronator teres
FAIL - Flexor carpi ulnaris
PASS- Palmaris longus
Fail - flexor carpi radialis
pronator teres
origin- CFO
insertion- lateral side of the shaft of the radius
innervation- median nerve
action- pronation (in the name!)
flexor carpi radials
origin- CFO
insertion- metacarpals 2&3
innervation- medial nerve
action- wrist flexor
palmaris longus
useless
origin- CFO
insertion- palmar aponeurosis
action- flexor (weak)
flexor carpi ulnaris
origin- CFO
insertion- pisiform
innervation- ulnar nerve (only one!!)
function- flexes/adducts
what is flexor retinaculum
fibours “bridge” that crosses from the medial to the lateral side of the wrist
forms the roof of the carpal tunnel
what is part of the intermediate group of the forearm
flexor digitorm profundus
what is the origin of the flexor digitorm superficials
starts at the median epicondyle and runs down the arm, across the coronoid process, to a line on the anterior radius
what are the innervations/actions of the intermediate group (anterior forearm)
innervation- median nerve
actions- flexion of the wrist, flexsion of the MP and PIP joint
how many muscles are part of the deep group
3
what are the muscles part of the deep group(anterior forearm)
flexor pollicis longus
flexor digitorum profundus
pronator quadratus
flexor pollicis longus
(long flexor of thumb)
origin- middle part of radius
insertion- distal phalanx of the thumb
innervation - median nerve
action- flexor of the thumb
flexor digitorm profundus
origin- proximal third quarter of ulnar shaft
insertion- base of distal phalanges
innervation- half median/ half ulnar
action- flex every joint they pass
pronator quadratus
origin- must be on ulna
insertion- radius
innervation median
action- pulls radius over ulna
what doesn’t go through the carpal tunnel
palmaris longus tendon
flexor carpi ulnaris
ulnar nerve and artery
radial artery
flexor carpi radialis
how many groups are in the posterior forearm muscles and what are they
2, superficial and deep
what is part of the superficial group of the posterior forearm
bracioradialis
extensor carpi radialis longus
exenstor carpi radialis brevis
extensor digitorm
extensor digiti minimi
bracioradialis
origin- CEO
insertion- styolid process
innervation- radial nerve
action- flexes
what is the CEO
common extensor origin
lateral epicondyle and supracondylar ridge
extensor carpi radialis longus/extensor carpi radialis brevis
origin - CEO
insertion- long- base of second metacarpal
brevis- third muscle
innervation- radial nerve
action- extend and abdut the wrist
extensor carpi ulnaris
origin- CEO
insertion- base of metacarpal 5
innervation- radial
action- extends with flexor carpi ulnaris
how many muscles are part of the deep group and what are they called (posterior forearm)
5, supinator
abductor pollicis longus
extensor pollicis brevis
extensor pollicis longus
extensor indicis
supinator
origin- back of the radial notch of the ulna
insertion- lateral side of the radius
innervation- radial nerve
action- supination
abductor pollicis longus
origin- interosseous membrane and ulna and radius
insertion- base of first metacarpal
innervation - radial nerve
extensor pollicis brevis
origin- interosseous membrane and ulna and radius
insertion- base of proximal phalanx of the thumb
innervation- radial nerve
extensor pollicis longus
originates- next to abductor pollicis
insertion- distal phalanx
innervation- radial nerve
extensor indicis
origin- short extensor of thumb
insertion- extensor expansion of index finger
innervation- radial nerve
what are the types of muscles in the hand
thenar muscles
hypothenar muscles
lumbriacal muscles
interossi and adductor pollicis
thenar muscles and how many muscles, what are they innervated by
form the swelling at the base of the thumb
3, innervated by the recurrent branch of median nerve
abductor pollicis brevis
origin- scaphoid
insertion- proximal phalanx of the thumb
innervation- recurrent branch of median nerve
flexor pollicis brevis
origin- flexor retinaculum
insertion- proximal phalanx
innervation- recurrent branch of median nerve
lateral of two found in base of the proximals phalanx
opponens pollicis
origin - distal flexor retinaculum
insertion- trapezium
action- oppositiion of the thumb (able to touch other fingers on hand)
what are the hypothenar muscles
abductor digiti minmi
flexor digiti minimi brevis
opponenes digiti minimi brevis
what are the hypothenar muscles
abductor digiti minmi
flexor digiti minimi brevis
opponenes digiti minimi brevis
abductor digiti minimi/flexor digiti minimi brevis
origin- pisiform/hook of hamate
insertion- abductor- medial side
brevis- lateral side
innervation- ulnar nerve
opponenes digiti minimi brevis
origin- flexor retinaculum and hook of hammate
insertion- medial side of metacarpal 5
innervation - ulnar nerve
lumbrical muscles
worm muscles
median nerve and ulnar nerve
flex the MP and PIP joints
insert on proximal joint
adductor pollicis
oblique head and transverse head
- transverse origin- shaft of middle metacarpal
- oblique head origin- capitate
insert on sesamoid bone
innervation - ulnar
action - adduct and abduct
palmar interossei
origin- axial side of metacarpal 2,4,5
insert- extensor expansions
innervation- ulnar
action- flex
dorsal interossei
origin- four spaces between 5 metacarpals
insertion- run toward axis, insert on index and ring fingers
function-adduct
innervation- ulnar
where does the hands blood supply come from
superficial and deep palmar arches
types of joints in the hand
carpal joints
carpometacarpal joints
how
