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MED221A/B Lectures > MSK 08 - The forearm and wrist > Flashcards

MSK 08 - The forearm and wrist Flashcards

1
Q

what structure is between the ulna and radius distally at the wrist joint

A

sacciform recess

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2
Q

what is between the distal ulna and the carpal

A

triangular fibro cartilage complex

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3
Q

what are the 3 functions of the interosseous membrane

A

hinge

muscle attachment

force transmission

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4
Q

where do you find the flexor retinaculum what bones do they link

A

over the carpal bones in the anterior of the hand

links scaphoid to pisiform and trapezium to the hamate hook

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5
Q

what is created via flexor reticulum

A

carpal tunnel

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6
Q

where is the extensor reticulum

A

posterior aspect of wrist - quadralateral shape

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7
Q

what runs in the carpal tunnel

A

all the flexor tendons

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8
Q

what does the brachial artery divide into distally in the forearm

A

radial and ulnar artery

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9
Q

aside from the brachial artery what does also feeds into the radial artery

A

radial recurrent artery

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10
Q

what vessels does the recurrent artery meet

A

collateral artery

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11
Q

what does the common interosseous artery divide into

A

anterior and posterior interosseous arteries

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12
Q

what does the anterior interosseous artery supply

A

all of anterior compartment muscles

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13
Q

what does the posterior interosseous artery supply

A

posterior compartment

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14
Q

what does the ulnar artery divide into

A

common interosseous artery

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15
Q

how many flexor muscles are there in the forearm deep, intermediate and superficial

A

superficial = 4
intermediate = 1
deep = 3

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16
Q

what are the 4 superficial forearm flexor muscles

A

pronator teres

flexor carpi radialis

flexor carpi ulnaris

palmaris longus

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17
Q

what is the origin and insertion of pronator teres

A

origin = supracondylar ridge (medial)

insertion = lateral radius

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18
Q

what is the origin and insertion of flexor carpi radialis

A

origin = Common flexor tendon

insertion = base of 2nd metacarpal

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19
Q

where does the common flexor tendon attach to on the elbow

A

medial epicondyle

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20
Q

what nerve runs through pronator teres

A

medial nerve

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21
Q

what artery runs with the median nerve

A

ulnar artery

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22
Q

what muscle does the radial artery run with

A

pronator teres

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23
Q

what is the origin and insertion of flexor carpi ulnaris

A

Origin = common flexor tendon
insertion = base of 5th metacarpal

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24
Q

what is the intermediate flexor muscle of the forearm

A

flexor digitorum superficialis

25
Q

what is the origin and insertion of flexor digitorum superficialis

A

origin = 1/2 CFT and 1/2 front of radius

insertion = base of middle phalanx digits 2-5

26
Q

where does flexor digitorum superficialis travel in relation to the flexor retinaculum

A

under the flexor retinaculum

27
Q

where does flexor carpi radialis travel in relation to the palmar aponeurosis

A

under

28
Q

where does flexor carpi ulnaris travel in relation to the palmar aponeurosis

A

under

29
Q

what does pronator teres do

A

pronates forearm

30
Q

what is the origin and insertion of palmaris longus

A

origin = common flexor tendon

insertion = palmar aponeurosis

31
Q

what are the 3 forearm flexor muscles that are deep

A

flexor digitorum profundus

flexor pollicis longus

pronator quadratus

32
Q

what is the origin and insertion of flexor digitorum profundus

A

origin = front of ulna and interosseous membrane

insertion = distal phalanx base 2-5 digits

33
Q

what is the origin and insertion of flexor pollicis longus

A

origin = front of radius

insertion = distal phalanx of thumb

34
Q

what is the origin and insertion of pronator quadratus

A

origin = medial ulna

insertion = lateral radius

35
Q

what is the relation of flexor digitorum superficialis tendon to the flexor digitorum profundus

A

superificialis splits allowing profundus to run through them

36
Q

where does the flexor digitorum profundus travel in relation to the flexor retinaculum

A

under

37
Q

where does the flexor pollicis longus travel in relation to the flexor retinaculum

A

under

38
Q

where does the pronator quadratus travel in relation to the flexor retinaculum

A

PQ is too high above where flexor retinaculum is located

39
Q

what is the artery running alongside FCR

A

radial artery

40
Q

what is the artery and nerve running along FCU

A

ulnar artery and nerve

41
Q

what carpal bone does FCU semi attach to

A

pisiform

42
Q

describe the path that the median nerve takes down the arm into and out of the cubital fossa - name muscles relative to the nerve

A

comes off the lateral and median cords and travels down the medial side of the anterior arm

enters cubital fossa and leaves cubital fossa by going through the two parts of pronator teres

43
Q

what nerve does the median nerve become once it leaves the cubital fossa

A

anterior and posterior interosseous nerves

44
Q

what does the median nerve innervate in the forearm - 4 muscles

A

flexor digitorum superficialis

palmaris longus

pronator teres

flexor carpi radialis

45
Q

what are the 3 muscles innervated by the anterior interosseous nerve

what group are these muscles

A

pronator quadratus

flexor pollicis longus

lateral half of the flexor digitorum profundus

group of deep forearm muscles (flexors)

46
Q

what are the 2 muscle groups that is innervated by the recurrent branch of the median nerve in the hand

A

thenar muscles and the 1st and 2nd lumbricals

47
Q

what does the anterior interosseous nerve further split into in the wrist and hand - which ones are motor and which are cutaneous

A

first splits to give off palmar cutaneous branch (cutaneous)

then splits to form recurrent branch (motor)

finally splits into the proper palmar digital nerves (cutaneous)

48
Q

what does the proper palmar digital nerve innervate

A

the lateral 3 and a half digits

49
Q

where does the palmar cutaneous branch of the median nerve run relative to the flexor retinaculum

A

runs over it

50
Q

how many muscles are innervated directly by the median nerve

A

4

51
Q

how many muscles are innervated directly by the anterior interosseous nerve

A

3

52
Q

what are the two motor branches that the median nerve splits into (not cutaneous)

A

recurrent branch

anterior interosseous nerve

53
Q

what are the two cutaneous sensory branches that the median nerve splits into

A

palmar cutaneous branch and proper palmar digital nerves

54
Q

describe the path that the ulnar nerve takes down the arm into and out of the cubital fossa

A

ulnar nerve comes out from the medial cord and runs medially down the anterior arm

half way down the arm it dives into the medial intermuscular septa to enter the posterior compartment

once runs down to the medial epicondyle it reenters the anterior compartment and runs through the cubital fossa

55
Q

what are the two muscles directly innervated by the ulnar nerve

A

flexor carpi ulnaris

medial half of flexor digitorum profundus

56
Q

what is the order of the 5 branches off the ulnar nerve - which ones are motor and which ones are cutaneous

A

palmar cutaneous branch (cutaneous)

dorsal cutaneous branch (cutaneous)

deep branch ulnar nerve (motor) and superficial branch of ulnar nerve (cutaneous)

proper palmar digital nerves

57
Q

what 4 groups of muscles does the deep branch of the ulnar nerve supply

A

hypothenar muscles

dorsal and palmar interossei

adductor pollicis

medial 2 lumbricals

58
Q
A

MED221A/B Lectures (23 decks)

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