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Anatomy Test 3 Cont.

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nicoledemott's version from 2017-11-16 16:07

Section 12

Question Answer
origin of the short head of the biceps brachiicoracoid
origin of the long head of the biceps brachiisupraglenoid tubercle of scapula
where does the biceps brachii insertradial tuberosity
innervation of the biceps brachiimusculotaneous nerve
action of the biceps brachiisupinates forearm and flexes elbow
strongest supinator of the forearmbiceps brachii
origin of the coracobrachialis musclecoracoid
insertion of the coracobrachialis musclemiddle 1/3 of medial surface of humerus
innervation of the coracobrachialis musclemusculocutaneous nerve
action of the coracobrachialis muscleflex and adduct shoulder (prevent dislocation)
origin of the brachialis muscledistal half of anterior surface of humerus
insertion of brachialis musclecoronoid process of ulna
innervation of brachialis musclemusculocutaneous nerve
action of the brachialis muscleflexes elbow (main flexor of elbow)
origin of long head of triceps brachiiinfraglenoid tubercle of scapula
origin of the lateral head of triceps brachiiposterior surface of humerus, superior to spiral groove
origin of the medial head of triceps brachiiposterior surface of humerus, inferior to spiral groove
insertion of triceps brachiiolecranon
innervation of the triceps brachiiradial nerve
action of the triceps brachiiextensor of elbow
origin of anconeuslateral epicondyle of humerus
insertion of anconeuslateral surface of olecranon
innervation of anconeusradial nerve
action of anconeusextends elbow
memorize

 

Question Answer
Actions of anterior compartment of the forearmFlexors and pronators
Innervation of the anterior compartment of the forearmmedian nerve
Actions of the posterior compartment of the forearmextensors and supinators
innervation of the posterior compartment of the forearmradial nerve
memorize

 

Question Answer
pronationpronator quadratus and pronator teres
proximallyradial head rotates in radial notch of ulna
distallydistal end of radius rotates around head of ulna
2 flexor- pronator muscle NOT innervated by the median nerveFCU and FDP (4th and 5th digits) innervated by the ulnar nerve
origin of the pronator teresulnar head --> coronoid process and humeral head --> medial epicondyle
insertion of the pronator teresproximal radial shaft
innervation of the flexor pronator musclemedian nerve
action of the flexor pronator musclepronates forearm
memorize

 

Question Answer
origin flexor carpi radialis (FCR) medial epicondyle of humerus
insertion flexor carpi radialis (FCR) base of 2nd metacarpal
innervation of flexor carpi radialis (FCR) median n.
action flexor carpi radialis (FCR) flexes and abducts wrist
origin palmaris longus medial epicondyle of humerus
insertion palmaris longus palmar aponeurosis
innervation palmaris longus median n.
action palmaris longus flexes wrist, tenses palmar aponeurosis
muscle absent in 14% of peoplepalmaris longus
origin flexor carpi ulnaris (FCU) medial epicondyle of humerus, olecranon/posterior border of ulna
insertionflexor carpi ulnaris (FCU) pisiform, hamate, 5th metacarpal base
innervation flexor carpi ulnaris (FCU) ulnar n.
action flexor carpi ulnaris (FCU) flexes and adducts wrist
origin flexor digitorum superficialis (FDS) medial epicondyle of humerus, proximal radius
insertion flexor digitorum superficialis (FDS) middle phalanges of 2nd- 5th digits
innervation flexor digitorum superficialis (FDS) median n.
action flexor digitorum superficialis (FDS ) flexes proximal interphalangeal and metacarpophalangeal joints of 2nd-5th digits
memorize

 

Question Answer
this syndrome results from any lesion that reduces size of carpal tunnelcarpal tunnel syndrome
memorize

Section 13

Question Answer
runs b/w biceps and brachialis emerges lateral to biceps as lateral cutaneous n. of forearmmusculocutaneous nerve
supplies all m’s in posterior compartment of arm and forearmradial nerve
sensory branch of radial nervesuperficial brach of radial nerve
motor branch of radial nerveposterior interosseous nerve
this nerve passes around humeral shaft in spiral groove --> pierces lateral intermuscular septum --> anterior compartment where it divides into superficial branch and posterior interosseousradial nerve
lateral to brachial artery descends into cubital fossa deep to bicipital apneurosis with no branches in axilla or armmedian nerve
medial to brachial artery that pierces medial intermuscular septum --> posterior to medial epicondyle with no branches in armulnar nerve
superior of cubital fossa b/w medial and lateral epicondyles
lateral of cubital fossa brachioradialis m.
medial of cubital fossa common flexor tendon origin on medial epicondyle
floor of cubital fossa brachialis and supinator m’s
contents of cubital fossabrachial a.-> radial and ulnar a’s ...biceps brachii tendon...median nerve....radial nerve -> superficial radial n. and posterior interosseous n.
this motion causes bicep tendon ruptureeccentric contraction
ulno-humeral articulation of elbow doesflexion
radio-capitellar articiulation of elbow doessupination/pronation
its joint capsule is weak anteriorly and posteriorly but is strengthened by collateral ligamentsELbow
2 ligaments of the elbowradial collateral ligament and ulnar collateral ligament
Tx of ulnar collateral ligament tearreconstruction; "tommy john procedure" and you replace UCL with palmaris longus tendon
Nursemaids Elbowsubluxation or dislocation of radial head caused by traction to arm treated by closed reduction
head of radiuselbow
head of ulna (styloid process)in wrist
ligament connecting radius and ulna isinterosseous membrane
memorize

Section 14

Question Answer
origin flexor digitorum superficialis (FDS) medial epicondyle of humerus, proximal radius
insertion flexor digitorum superficialis (FDS) middle phalanges of 2nd- 5th digits
innervation flexor digitorum superficialis (FDS) median n.
action flexor digitorum superficialis (FDS) flexes proximal interphalangeal and metacarpophalangeal joints of 2nd-5th digitsflexor digitorum
origin profundus (FDP) proximal ulna and interosseous membrane
insertion profundus (FDP) bases of distal phalanges of 2nd-5th digits
innervation profundus (FDP) ulnar n. (4th,5th digits), anterior interosseous n. from median n. (2nd,3rd digits)
action profundus (FDP) flexes distal interphalangeal joints
origin flexor pollicis longus (FPL) anterior surface of radius
insertion flexor pollicis longus (FPL) base of distal phalanx of thumb
innervation flexor pollicis longus (FPL) anterior interosseous n. from median n.
action flexor pollicis longus (FPL) flexes interphalangeal joint of thumb
origin pronator quadratus distal anterior ulna
insertion pronator quadratus distal anterior radius
innervation pronator quadratus anterior interosseous n. from median n.
action pronator quadratus pronates forearm
memorize

Section 15 Extensor Muscles

Question Answer
origin brachioradialis lateral supracondylar ridge of humerus
insertion brachioradialis lateral surface of distal radius
innervation brachioradialis radial n.
action brachioradialis flexion of elbow with forearm in mid-pronation
origin extensor carpi radialis longus (ECRL) lateral supracondylar ridge of humerus
insertion extensor carpi radialis longus (ECRL) dorsal base 2nd metacarpal
innervation extensor carpi radialis longus (ECRL) radial n.
action extensor carpi radialis longus (ECRL) extend and abduct wrist
origin extensor carpi radialis brevis (ECRB) lateral epicondyle of humerus
insertion extensor carpi radialis brevis (ECRB) dorsal base 3rd metacarpal
innervation extensor carpi radialis brevis (ECRB) radial n.
action extensor carpi radialis brevis (ECRB) extend and abduct wrist
origin extensor digitorum communis (EDC) lateral epicondyle of humerus
insertion extensor digitorum communis (EDC) extensor expansions of 2nd-5th digits
innervation extensor digitorum communis (EDC) radial n.
action extensor digitorum communis (EDC) extend metacarpophalangeal joints of 2nd-5th digits
triangular aponeurosis that wraps around distal ends of metacarpals and the proximal phalangesextensor expansion
origin extensor digiti minimi (EDM) lateral epicondyle of humerus
insertion extensor digiti minimi (EDM) extensor expansion of 5th digit
innervation extensor digiti minimi (EDM) radial n.
action extensor digiti minimi (EDM) extends metacarpophalangeal joint 5th digit
origin extensor carpi ulnaris (ECU) lateral epicondyle of humerus, posterior border of ulna
insertion extensor carpi ulnaris (ECU) base of 5th metacarpal
innervation extensor carpi ulnaris (ECU) radial n.
action extensor carpi ulnaris (ECU) extends and adducts wrist
origin supinator lateral epicondyle of humerus
insertion supinator proximal 1/3 of radius
innervation supinator radial n.
action supinator supinates forearm
Radial nerve divides intosuperficial branch of radial nerve (sensory) and deep branch (posterior interosseous nerve) - motor
nerve between brachioradialis and brachialisradial nerve
memorize

 

Question Answer
origin extensor indicis posterior surface of distal 1/3 of ulna
insertion extensor indicis extensor expansion of 2nd digit
innervation extensor indicis posterior interosseous n. from radial n.
action extensor indicis extends 2nd digit
origin abductor pollicis longus (APL) posterior surface of proximal halves of ulna/radius/interosseous membrane
insertion abductor pollicis longus (APL) base of 1st metacarpal
innervation abductor pollicis longus (APL) posterior interosseous n. from radial n.
action abductor pollicis longus (APL) abducts thumb
origin extensor pollicis longus (EPL) posterior surface of middle 1/3 of ulna
insertion extensor pollicis longus (EPL) dorsal base of distal phalanx of thumb
innervation extensor pollicis longus (EPL) posterior interosseous n. from radial n.
action extensor pollicis longus (EPL) extends distal phalanx of thumb
origin extensor pollicis brevis (EPB) posterior surface of distal 1/3 radius
insertion extensor pollicis brevis (EPB) dorsal base of proximal phalanx thumb
innervation extensor pollicis brevis (EPB) posterior interosseous n. from radial n.
action extensor pollicis brevis (EPB) extends proximal phalanx of thumb
muscles that extend, abduct, or adductECRL, ECRB, ECU
muscles that extend the 2nd-5th fingersEDC, extensor indicis, EDM
muscles that extend or abduct the thumbAPL, EPB, EPL
boundaries of anatomical snuffboxEPL and APL/EPB
floor of the anatomical snuffboxscaphoid and trapezium
what artery crossed the anatomical snuffboxradial artery
memorize

Section 16 Arteries of the Forearm

Question Answer
brachial a.divides into ulnar and radial a’s in inferior part of cubital fossa
ulnar a. and median n.pass b/w humeral head and radial head of FDS
ulnar a.descends obliquely to join ulnar n.
anterior and posterior ulnar recurrent a’s anastomose with inferior and superior ulnar collateral a’s peri-articular anastomoses of elbow
common interosseous a. anterior and posterior interosseous a’s
radial recurrent a. anastomoses withradial collateral a.
lies on muscle until it reaches distal part of forearm where its pulse is palpableradial artery
memorize

Section 17 Nerves of the Forearm

Question Answer
principal n. of anterior compartment of forearmmedian n.
main branch of the median nerveinterosseous nerve (n. runs distally on interosseous membrane)
palmar cutaneous branch of median n.
supplies 1.5 m’s (FCU and ulnar part of FDP)ulnar nerve
memorize

Section 18 Bones of Wrist and Hand

Question Answer
Proximal Row of carpal bonesscaphoid, lunate, triquetrum, pisiform
Distal Rox of carpal bonestrapezium, trapezoid, capitate, hamate
How many carpal (wrist bones)8
How many metacarpals5
most common fracture (aside from fingers)Distal radius fracture/ Colles Fracture from a fall on outstretched hand
most frequently fractured carpal bonescaphoid fracture (tenderness in snuffbox)
fracture of the 5th metacarpalboxers fracture
distal phalangeal fractures are commonly associated withsubungual hematoma
3 joints of the handDIP (distal interphalangeal), PIP (proximal interphalangeal), MP (metacarpophalangeal)
which end of the radius rotates around the distal end of ulnadistal end
distal ends of radius and ulna are united byarticular disc or triangular fibrocartilage complex (TFCC)
DIstal end of radius and TFCC of distal radio-ulnar joint articulate withproximal row of carpal bones (except- pisiform)
ligaments of the wristpalmar radiocarpal ligaments, dorsal radiocarpal ligaments, and collateral ligaments
Flexion of the wristFCR and FCU
extension of the wristECRL, ECRB, and ECU
abduction of the wristAPL, FCR, ECRL, and ECRB
adduction of the wristECU and FCU
saddle joint of the wristcarpometacarpal (CMC) joint of thumb
joint between proximal and distal rowsmidcarpal joint
movements of the thumbabduction, adduction, extension, flexion, opposition and reposition
memorize

Section 19

Question Answer
thenar muscles that do extensionextensor pollicis longus, extensor pollicis brevis, and abductor pollicis longus
thenar msucles that do flexionflexor pollicis longus and flexor pollicis brevis
thenar muscles that do abductionabductor pollicis longus and abductor pollicis brevis
thenar muscles that do adductionadductor pollicis and 1st dorsal interosseous
thenar muscle that opponensopponens pollicis
memorize

Section 20 Arteries of the Hand

Question Answer
this artery divides into superficial palmar arch-> common palmar digital a’s-> proper palmar digital a’sulnar artery
this artery anastomoses with deep branch of ulnar a. to form deep palmar arch-> palmar metacarpal a’s and princeps pollicis a.radial artery
memorize

Section 21 Nerves of the Hand

Question Answer
nerve that provides sensory to palmar surface of lateral 3.5 digits (lateral palm)median nerve
this nerve supplies no hand muscles, its superficial branch is entirely sensory of the lateral 2/3 of dorsum of hand and dorsum of thumbradial nerve
memorize