WK9 The Arm

Question 1

Supination

Answer 1

palm upwards

Question 2

Pronation

Answer 2

palm downwards

Question 3

Flexor

Answer 3

anterior side of upper limb

Question 4

Extensor

Answer 4

posterior side of upper limb

Question 5

Humerus characteristic features

Answer 5

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

Question 6

Radial groove function

Answer 6

carries radial nerve and deep radial artery

Question 7

Head of radius articulates with

Answer 7

capitulum of humerus - weak articulation

Question 8

Trochlear articulation

Answer 8

trochlear notch of ulnar

Question 9

Ulnar processes

Answer 9

coronoid and olecranon

Question 10

Coronoid fossa function

Answer 10

coronoid process fits during flexion

Question 11

Humerus and ulna articulation

Answer 11

strong, U shape, strong in flexion and extension

Question 12

Radius and humerus articulation

Answer 12

weak, with capitum of humerus, shallow groove

Question 13

Humerus and ulna joint

Answer 13

hinge joint

Question 14

Radius, humerus and ulna joint

Answer 14

pivot

Question 15

What does the radius, humerus and ulna joint allow

Answer 15

pronation and supination

Question 16

pronation action

Answer 16

radius rotate around the ulna, ulna doesnt move

Question 17

muscles involved in pronation/supination

Answer 17

insert diagonally onto the radius

Question 18

Annular ligament origins and insertions

Answer 18

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

Question 19

Annular ligament function

Answer 19

allows radius to pivot

Question 20

Why is the head of radius bigger than the neck

Answer 20

stops it slipping out of the articulation

Question 21

Axillary artery origin

Answer 21

lateral border of 1t rib

Question 22

Brachial artery origin

Answer 22

lower border of teres major

Question 23

Origins of brachial plexus nerves

Answer 23

C5-T1

Question 24

Terminal branches of brachial plexus

Answer 24

axilliary, musculo-cutaneous, radial, median and ulnar

Question 25

Radial nerve location

Answer 25

mostly posterior

Question 26

Radial nerve innervates

Answer 26

back of arm and forearm

Question 27

Main flexors in arm

Answer 27

biceps brachii, coraco brachialis and brachialis

Question 28

Muscles that underlie the biceps

Answer 28

coraco-brachialis and brachialis

Question 29

Coracobrachialis origins and insertions

Answer 29

from corocoid process of scapula, to medial shaft of humerus

Question 30

Strongest flexor of fore arm

Answer 30

brachialis

Question 31

Main extensor

Answer 31

tricep

Question 32

Heads of triceps converge onto

Answer 32

olecranon process of ulna

Question 33

What innervates the triceps

Answer 33

radial nerve

Question 34

Cubital fossa

Answer 34

triangular area in front of elbow joint

Question 35

Veins in cubital fossa

Answer 35

cephalic and basilic - variable arrangement, superficial

Question 36

Bicep aponeurosis function

Answer 36

protects cubital fossa, brachial artery and median nerve