arm

Question 1

biceps brachii short head origin

Answer 1

caracoid process

Question 2

biceps brachii long head origin

Answer 2

supraglenoid tubercle
passes over head of humerus deep to glenohumeral joint capsule
through bicipital groove
held in groove by transverse humeral ligament

Question 3

biceps brachii insertion

Answer 3

heads converge + insert onto radial tuberosity + bicipital aponeurosis

Question 4

action biceps brachii

Answer 4

• flexor of forearm
• supinator of forearm when elbow joint is flexed
• can flex glenohumeral joint

Question 5

a deformity of biceps brachii

Answer 5

popeye deformity

• following rupture of biceps brachii tendon
• on flexing elbow, biceps brachii bulges out as its unrestrained fibres contract

Question 6

to teste integrity of musculocutaneous nerve

Answer 6

tap on biceps brachii tendon at elbow

Question 7

origin brachialis

Answer 7

distal 1/2 of anterior surface of humerus

Question 8

insertion brachialis

Answer 8

ulnar tuberosity

coronoid process

Question 9

innervation brachialis

Answer 9

musculocutaneous nerve

small lateral part = radial nerve

Question 10

action brachialis

Answer 10

flexes forearm

Question 11

origin coracobrachialis

Answer 11

tip of caracoid process

Question 12

insertion coracobrachialis

Answer 12

middle 1/3 medial surface humerus

Question 13

innervation coracobrachialis

Answer 13

musculocutaneous

Question 14

action coracobrachialis

Answer 14

flexes arm

adducts arm

Question 15

origin triceps brachii

Answer 15

long head - infraglenoid tubercle

lateral head - posterior humerus superior to radial groove

medial head - posterior humerus inferior to radial groove

Question 16

insertion triceps brachii

Answer 16

superior surface olechranon

fascia of forearm

Question 17

innervation triceps brachii

Answer 17

radial nerve

Question 18

action triceps brachii

Answer 18

extends FOREARM

Question 19

anconeus origin

Answer 19

lateral epichondyle humerus

Question 20

insertion anconeus

Answer 20

lateral side of olechranon + upper 1/4 posterior surface ulna

Question 21

innervation

Answer 21

radial nerve

Question 22

action

Answer 22

extends FOREARM

tenses elbow joint capsule too prevent it pinching during extension