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BMS 228 Anatomy > WK9 The Arm > Flashcards

WK9 The Arm Flashcards

1
Q

Supination

A

palm upwards

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2
Q

Pronation

A

palm downwards

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3
Q

Flexor

A

anterior side of upper limb

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4
Q

Extensor

A

posterior side of upper limb

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5
Q

Humerus characteristic features

A

head, surgical neck, greater and lesser tubercle, inter-tubercle groove

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6
Q

Radial groove function

A

carries radial nerve and deep radial artery

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7
Q

Head of radius articulates with

A

capitulum of humerus - weak articulation

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8
Q

Trochlear articulation

A

trochlear notch of ulnar

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9
Q

Ulnar processes

A

coronoid and olecranon

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10
Q

Coronoid fossa function

A

coronoid process fits during flexion

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11
Q

Humerus and ulna articulation

A

strong, U shape, strong in flexion and extension

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12
Q

Radius and humerus articulation

A

weak, with capitum of humerus, shallow groove

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13
Q

Humerus and ulna joint

A

hinge joint

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14
Q

Radius, humerus and ulna joint

A

pivot

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15
Q

What does the radius, humerus and ulna joint allow

A

pronation and supination

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16
Q

pronation action

A

radius rotate around the ulna, ulna doesnt move

17
Q

muscles involved in pronation/supination

A

insert diagonally onto the radius

18
Q

Annular ligament origins and insertions

A

from radial notch of ulna, wraps around head and neck of radius

19
Q

Annular ligament function

A

allows radius to pivot

20
Q

Why is the head of radius bigger than the neck

A

stops it slipping out of the articulation

21
Q

Axillary artery origin

A

lateral border of 1t rib

22
Q

Brachial artery origin

A

lower border of teres major

23
Q

Origins of brachial plexus nerves

A

C5-T1

24
Q

Terminal branches of brachial plexus

A

axilliary, musculo-cutaneous, radial, median and ulnar

25
Q

Radial nerve location

A

mostly posterior

26
Q

Radial nerve innervates

A

back of arm and forearm

27
Q

Main flexors in arm

A

biceps brachii, coraco brachialis and brachialis

28
Q

Muscles that underlie the biceps

A

coraco-brachialis and brachialis

29
Q

Coracobrachialis origins and insertions

A

from corocoid process of scapula, to medial shaft of humerus

30
Q

Strongest flexor of fore arm

A

brachialis

31
Q

Main extensor

A

tricep

32
Q

Heads of triceps converge onto

A

olecranon process of ulna

33
Q

What innervates the triceps

A

radial nerve

34
Q

Cubital fossa

A

triangular area in front of elbow joint

35
Q

Veins in cubital fossa

A

cephalic and basilic - variable arrangement, superficial

36
Q

Bicep aponeurosis function

A

protects cubital fossa, brachial artery and median nerve

BMS 228 Anatomy (9 decks)

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