Flashcards
Antebrachium:08
Cards in this deck (58)
- 1interosseous membraneunique to antebrachium- because spans the space between the 2 bones
- 2extrinsic hand muscles flexorsFlexor carpi radialis:
Palmaris longus:
flexor carpi ulnaris
Flexor digitorum superficialis:
Flexor digitorum profundus:
flexor pollicis longus
pronator quadratus - 3extrinsic hand muscles extensorsECRL
ECRB
ED
EDMin
ECU
APL
EPL
EPB
EI - 4anterior forearm B Nulnar and anterior interosseous A
median N except FCU 1/2 FDP - 5posterior forearm N Bdeep branch of radial N
radial and posterior IO A - 6ECR + ECBequivalent to flexor carpi radialis
- 7pronator teressuperifical anterior antebrach- ulnar A median N
median nerve passes between its 2 heads
originates at medial epicondyle and ulna - 8FCR insertionbase of 2 & 3 metacarpals
- 9FDSits own middle layer in antebrachium
still median N and ulnar A
PIP joints flex
synergist for flexion of the wrist
O at medial epi (flexor origin), on coronoid process of ulna, at anterior oblique line of radius - 10deep anterior forearmall flexors, but dont cross elbow
posterior interosseous artery - 11pronator quadratus insertionradius
- 12flexor pollicis longusinterphalangeal joint of thumb to distal phalanx
- 13superficial posterior forearmbrachioradialis (more lateral)
ext carpi radialis longus
ext carpi radialis brevis
ext digitorum
ext digiti minimi
ext carpi ulnaris - 14common extensor origin?all extensors but Ext carpi rad long and brachioradialis (which isn't an extensor- it flexes elbow with forearm in neutral position)
- 15ext digitorumactive ext at metacarpal phalangeal jts
passive flexion of IP joint results (NOT one of its ACTIONS)
extension of wrist - 16abductor digiti minimi flexor digiti minimi opponens digiti minimi lumbricals (there is one medial toulnar nerve and artery
lumbrical for pinkie flexes MCP and extends by extensor hood DIP and IP
abductor can deviate the little finger
FDMin can flex
Opponens can cause opposition of digit 5 at CMC joint
lose ulnar innervation- alll of these don't work. so why does pinkie deviate as if being abducted?
EXTENSOR DIGITI MINIMI not lost. deep branch radial N! extends digit 5 at MCP and extends wrist. but, uncontrolled, causes that mild abduction - 17deep posterior forearm antebrachial Mposterior IO A
DEEP radial N - 18extensor digitorum shares insertion withextensor indicis- both insert on extensor aponeurosis
- 19supinatordeep posterior forearm, deep radial n, posterior interosseous N
deep branch radial N enters antebrachium by passing through supinator - 20FCU corresponds 1:1 toext carpi ulnaris
- 21palmaris longus corresponds 1:1 tono other muscle. it is unique in the anterior flexor compartment of the forearm
- 22flexor and extensor carpi radialis can compensate forlost wrist abduction
compensate for lost ABD carpi rad - 23flexor and extensor carpi ulnaris can compensate forlost wrist adduction
the combined flex/ext cancel out and left wit a mild adduction - 24extrinsic handflexor digitorum S and P correspond with ED, EDmin, and EI
- 25extrinsic hand FPL?FPL correspond ext poll brevis, EPL
- 26extrinsic hand abductor pollicis longus on the posterior compartment corresponds to what in the flexor compartment?nothing- ABD Poll Long is unmatched in the flexor comp
- 27pronator teres, a pronator corresponds tosupinator muscle, a supinator
- 28pronator quadratus, a pronator, corresponds tosupinator
- 29brachioradialis, flexor of elbow has radial innervation.unmatched by either compartment- but studied as posterior compartment because radial innervation
- 30which of these supinates? pronator teres supinator delts triceps biceps brachioradialissupinator, biceps
- 31radial Aemerges from brachial A in cubital fossa, running under brachioradialis to superficial extensor group with superficial branch of radial N
- 32radial recurrentanastemos with anterior radial collateral A
- 33ulnar between FCU FDPsuperficial anterior group.
1. anterior ulnar recurrent--- inf ulnar collat
2. posterior ulnar recurrent---- anast w wup uln collat
3. common interosseous-
post inteross &post inteross recurr,
anterior interosseous - 34posterior ulnar recurrentanastamose with superior ulnar collateral,
- 35recurrent arteriesmedial to lateral
radial recurrent, posterior IO recurrent (back), anterior ulnar recurrent, posterior ulnar recurrent (back) - 36median cubital vein bridges basilic and cephalic veinscephalic is on radial side of forearm.
MCV is used for blood draw.
underneath is protective fascial layer. - 37key point about cutaneous Median N in antebrachiumcutaneous branch innervates thenar eminence, but emerges and is vulnerable before then, in forearm. LESION.
- 38in antebrachium ulnar innervatesFCU 1/2FDP
- 39cutaneous ulnar Ndorsal - dorsal side above hypothenar em
palmar- hypothenar em - 40radial N in antebrachiuminnervates brachioradialis, ECRL, before dividing into superficial, deep.
SUPERficial split is cutaneous and goes ONLY to posterior lateral hand
deep split enters forearm through supinator and innervates posterior extensors. - 41lesion lower arm Radial Ntriceps (extensors) safe, so elbow extension ok but lose forearm extensors- wrist drop
elbow flexion in handshake compromised- brachioradialis
cutaneous lost POSTERIOR RADIAL HAND only - 42lesion of deep branch radial nstill some wrist extensors left alive. ECRL only one that is ok.
CUTANEOUS is fine because that's SUPERFICIAL branch - 43lesion of superifical radial N antebrachlose just cutaneous dorsal radial hand.
- 44cubital fossabrachial V & A
median N, medial to Brach A
radial N, lateral to Brach A
bordered medially by pronator teres, laterally by brachiorad.
floor brachialis and supinator (distal) - 45musculocutaneous Nbetween biceps and brachialis
when emerges, now lat antebrach cut - 46radial nerve emerges anterior just before the elbow. it gives off branches to ECRL and brachioradialis before superficial branch under brachioradialis muscle, with radial A then deep branch through SUpinator, to innervate remainder of forearm muscles.1. ECRL & brachiorad
2. superficial goes under brachiorad muscle with radial A
3. deep branch heads through Supinator and to innervate the rest of the posterior forearm muscles- extensors.
radial C5-T1 - 47radial injuryIt can be compressed against the humerus by crutches, causing crutch paralysis. Symptoms of damage to the deep branch of the radial nerve typically include "wrist drop", which is the flexion of fingers, hand, and wrist, since the extensor muscles supplied by the nerve are paralyzed. Normal sensation of the skin is retained, since this nerve only provides sensory function to ligaments and articulations of the carpal and metacarpal joints
- 48deep branch radial NECRB
ED
EDmin
ECU
Supinator
EI
AbdPL
EPB
EPL
(all superficial posterior antebrachium bar brachioradialis) - 49elbow joint protected medially by? elbow joint protected laterally by?FDP, posterior band ulnar collateral
radial collateral ligament - 50elbow consists of and its stability is due to2 hinge joint
1 pivot joint
LIGAMENTS different than shoulder!!
also bone: olecranon/ trochlear notch - 512 hinge joints with stabilizing collateral ligaments1. humeroulnar. MEDIAL JOINT
medial collat lig- anterior, posterior, oblique fibres
2. humeroradial joint- LATERAL (RADIAL) collateral ligament
and ANNULAR ligament
capitulum not trochlea humerus***** - 523rd elbow jointproximal radioulnar joint
annular and quadrate ligaments(between ulna and radius)
the proximal radioulnar is a pivot joint
annular lig attach to radial notch of ulna - 53anterior portion of MCLattach to coronoid of ulna
- 54clinical testing collateral ligamentsif medial ligament cannot protect from abduction
if lateral ligament cannot protect from adduction
hold still distal brachium then push forearm - 55most common radius/ulna joints dislocation?ulna shunted posteriorly- fall and land on hands, push ulna posterior. Ulnar N damaged. CLAW HAND- lower cords BP
between olecranon and medial epicondyle - 56fractures elbow joint?fracture hum just above R & U- muscles spasm and pull ends of bone apart. damage brachial ARTERY. blood fill in cubital fossa, local pressure increases dramatically.
affect both radial and ulnar artery - 57nerve supply elbowanterior: median N, musculocut N
posterior: Radial N, Ulnar N - 58fibrocartilage radioulnar?theres are 3 radioulnar joints
proximal/ superior- annular ligs
middle- a fibrous synarthrosis, syndesmosis- interosseous membrane
distal- the TFCC- triangulo-fibrocartilaginous complex
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- Flashcards on Antebrachium:08, created by Fiona Doolan on 03/03/2016.
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- Fiona Doolan
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