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MSK test 2 > lec 8 > Flashcards

lec 8 Flashcards

1
Q

where do most posterior arm muscles come from

A

lateral epicondyle

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2
Q

brachiolradialis
-origin
-insertion
-function

superficial or deep layer of posterior compartment?

A

supracondylar ridge of humerus –> distal end of radius proximal to styloid process

  1. flex forearm (in mid pronation)

-beer drinking arm
-actually a flexor arm, even though in extensor/posterior compartment bc innervated bar radial nerve

superficial

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3
Q

extensor carpi radilias longus
-origin
-insertion
-function

superficial or deep layer of posterior compartment?

A

supracondylar ridge of humerus –> base of 2nd metacarpal

  1. extend hand
  2. radial deviate (abduct) wrist
  3. flex elbow; weak

superficial

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4
Q

extensor carpi radialis brevis
-origin
-insertion
-function

superficial or deep layer of posterior compartment?

A

lateral epicondyle of humerus –> base of 3rd metacarpal

  1. extend hand
  2. radial deviate/ abduct hand

superficial

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5
Q

mobile wad of 3

A

brachioradialis
extensor carpi radialis brevis
extensor carpi radialis longus

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6
Q

extensor digitorum
-origin
-insertion
-function

superficial or deep layer of posterior compartment?

A

lateral epicondyle of humerus (via common extensor tendon) –> distal and middle phalanges of fingers 2-5 (via dorsal digital expansion)

  1. extension of fingers 2-5 at MCP PIP and DIP joiunts
  2. extend hand
  3. extend elbow; weak

superficial

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7
Q

extensor digiti minimi
-origin
-insertion
-function

superficial or deep layer of posterior compartment?

A

lateral epicondyle of humerus –> middle and distal phalanges of little finger

  1. extend finger at PIP, DIP, MCP
  2. extend hand at wrist
  3. extend elbow

superficial

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8
Q

dorsal digital expansion/ extensor hoods

A

on dorsal side of digits; triangular tendinous aponeurosis

lumbrical and interossei muscles attach to their sides

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9
Q

extensor carpi ulnaris
-origin
-insertion
-function

superficial or deep layer of posterior compartment?

A

lateral epicondyle of humerus and ulna –> base of 5th metacarpal bone

  1. extend hand
  2. ulnar deviation. adduct
    3.elbow extend weak

superficial

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10
Q

anconeous
-origin
-insertion
-function

superficial or deep layer of posterior compartment?

A

lateral epicondyle humerus –> olecranon process of ulna

  1. weak elbow extension

superficial

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11
Q

supinator
-origin
-insertion
-function

superficial or deep layer of posterior compartment?

A

ulna and lateral epicondyle of humerus –> radius

  1. supinate forearm
  • 2 head have relationship with deep branch of radial nerve

deep

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12
Q

abductor pollicis longus
-origin
-insertion
-function

superficial or deep layer of posterior compartment?

A

ulna, radius and interosseous membrane –> base of 1st metacarpal

  1. abduct thumb at CMC
  2. extend thumb at CMC
  3. radial deviation hand at wrist

deep

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13
Q

extensor pollicis brevis
-origin
-insertion
-function

superficial or deep layer of posterior compartment?

A

radius and interosseous membrane –> base of proximal phalanx of thumb

  1. extend thumb at CMC and MCP
  2. extend hand
  3. radial deviation/ abduct hand

deep

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14
Q

extensor pollicis longus
-origin
-insertion
-function

superficial or deep layer of posterior compartment?

A

ulna and interosseous membrane –> base of distal phalanx of thumb

  1. extend thumb at CMC, MCP, IP joints
  2. extend wrist
  3. radial deviate/ abduct

deep

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15
Q

abductor pollicis longus vs extensor pollicis longus vs extensor pollicis brevis in where they originate and insert

A

–> all do radial deviate/ abduct hand, extend hand and extend thumb at some joints

abductor pollicis longus: radius and ulna to base of 1st metacarpal
extensor pollicis brevis: radius to proximal phalanx
extensor pollicis longus: ulna to distal phalanx

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16
Q

anatomical snuff box medial and lateral borders

-bones

-artery

A

medial borders: extensor pollicis longus

lateral borders: extensor pollicis brevis and abductor pollicis longus

-radial artery

scaphoid and tranpezium Sltp Ttch

17
Q

medial epicondylitis; which sport and tendon

A

common flexor tendon; golf elbow

18
Q

lateral epicondylitis; sport and tendon

A

common extensor tendon ; tennis

19
Q

if injure posterior cord of brachial plexus which nerves are damaged and muscles effected

A

radial nerve
-extensor/posterior arm and forearm
-extension of arm, forearm, wrist, supinate
- wrist drop palsy

axillary nerve
-delts, teres minor;
-abduct and external rotate shoulder

sensory deficits: lateral shoulder, posterior forearm, lateral 3.5 digits (dorsal surface)

20
Q

carpal arch

A

carpal tunnel and flexor retinaculum
9 tendons
-4 flexor digitorum superficialis
-4 flexor digitorum profundus
-1flexor polices longus
median nerve

21
Q

intrinsic muscles of the hand

3 groups and what is the nerve

A
  1. thenar
  2. hypothenar
  3. central

median and ulnar nerves

22
Q

thenar muscles; which nerve

thumb side

A

abductor pollicis brevis
flexor pollicis brevis
opponens pollicis

median nerve

23
Q

hypothenar muscles; which nerve

pinky side

A

abductor digiti minimi
flexor digiti minimi brevis
opponens digiti minimi

ulnar nerve

24
Q

central muscles of hand; which nerve

A

lumbricals (4) –> 2 median and 2 ulnar nerve

dorsal interosseous muscles (4)
palmar interossesou muscles (3)
adductor pollicis
–> ulnar nerve

25
Q

abductor pollicis brevis
-origin
-insertion
-function

which group of hand and nerve

A

tubercles of scaphoid and trapezium and flexor retinaculum –> base of proximal phalanx of thumb

  1. abduction of thumb

thenar group, median nerve

26
Q

flexor pollicis brevis
-origin
-insertion
-function

which group of hand and nerve

A

flexor retinaculum and trapezium –> base of proximal phalanx of thumb

  1. flexion of thumb

thenar, median nerve

27
Q

opponens pollicis
-origin
-insertion
-function

which group of hand and nerve

A

flexor retinaculum and trapezium –> 1st metacarpal

  1. opposition of thumb

thenar group, median nerve

28
Q

palmaris brevis
-origin
-insertion
-function

which group of hand and nerve

A

palmar aponeurosis –> skin of medial side of hand

  1. wrinkles skin; improve grip

hypothenar group; ulnar nerve

29
Q

abductor digiti minimi
-origin
-insertion
-function

which group of hand and nerve

A

pisiform –> base of proximal phalanx of little finger

  1. abduct little finger

hypothenar
; ulnar

30
Q

flexor digiti minimi brevis
-origin
-insertion
-function

which group of hand and nerve

A

flexor retinaculum and hook of hamate –> base of proximal phalanx of 5th finger

  1. flex 5th finger

hypothenar ulnar nerve

31
Q

opponents digiti minimi
-origin
-insertion
-function

which group of hand and nerve

A

flexor retinacuclum and hook of hamate –> 5th metacarpal bone

  1. opposition of 5th finer

ulnar nerve and hypothenar group

32
Q

biceps vs triceps origin

A

supraglenoid vs infraglenoid

33
Q

adductor pollicis
-origin
-insertion
-function

which group of hand and nerve

A

oblique head: base of 2 and 3 metacarpal and capitate
transverse head: 3rd metacarpil

base of proximal phlanx of thumb

  1. adduct thumb

central and ulnar

–> bulk of 1st web is made by it

34
Q

lumbricals
-origin
-insertion
-function

which group of hand and nerve

A

tendon of flexor digitorum profundus of each finger

lumbrical 1 to dorsal digital expansion of finger 2

lumbrical 2 DDE finger 3

lumbrical 3- finger 4
lumbrical 4- finger 5

–> 4 lumbricals for fingers 2-5

  1. flex 2-5 at MCP
  2. extend 2-5 at PIP and DIP

TATA moment
central group
median nerve: lumbricals 1 2
ulnar nerve: lumbricals 3 4

35
Q

dorsal interosseous muscles
-origin
-insertion
-function

which group of hand and nerve

A

adjacent sides of metacarpals

1: lateral side of index
2: lateral side of middle
3: medial side of middle
4: medial side of ring
–> fingers 2, 3, 3, 4

  1. abduction of finger 234 at MCP
    2.flex fingers 234 at MCP
  2. extend fingers 234 at DIP and PIP

ulnar nerve; central group

36
Q

dorsal interosseous vs palmar interosseous actions

A

DAB and PAD

dorsal abduction
palmnar adduction

37
Q

which movements do dorsal, planar interosseous and lumbricals all do

A

flex extend

dorsal-abdDAB
palmar-addPAD

38
Q

which joints do you usually flex fingers at vs extend fingers for intrinsic Hand muscles

A

flex- MCP
extend DIP and PIP

39
Q

palmar interosseous muscles
-origin
-insertion
-function

which group of hand and nerve

A

anterior side (palmar interosseous) of metacarpal 2, 4, 5

–> base of proximal phalanges and dorsal digital expansions o
1 for index finger (2)
2. for ring (4)
3. for little (5)

  1. adduct 245 at MCP
  2. flex 245 at MCP
  3. extend 245 at DIP and PIP

centreal, ulnar nerve

MSK test 2 (6 decks)

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