Muscles Of Arm

Question 1

The arm is divided into ant and post compartments by extension of deep fascia called

Answer 1

Medial and lateral intermuscular septa

Question 2

Muscles of anterior compartment of arm include

Answer 2

Coracobrachialis

Biceps brachii

Brachialis

Question 3

Origin of coracobrachialis

Answer 3

Originates from the coracoid process of the scapula

Question 4

Insertion

Answer 4

muscle passes through theaxillaand attaches the medial aspect of the humerus shaft (at the level of the deltoid tubercle).

Question 5

Nerve supply

Answer 5

Musculocutaneous nerve

Question 6

Function

Answer 6

Flexes arm at shoulder joint

Question 7

Arterial supply

Answer 7

Muscular branches of brachial artery

Question 8

Origin of Biceps brachii

Answer 8

Long head originates from the supraglenoid tubercle of thescapula.

Short head originates from the coracoid process of the scapula.

Question 9

Insertion

Answer 9

Insert distally into the radial tuberosity and the fascia of the forearm via the bicipital aponeurosis.

Question 10

Nerve supply

Answer 10

Musculocutaneous nerve

Question 11

Function

Answer 11

Supination of the forearm

Flexion at the elbow and shoulder.

Question 12

Arterial supply

Answer 12

Brachial artery

Question 13

Origin of brachialis

Answer 13

Originates from the medial and lateral surfaces of the humerus shaft.

Question 14

Insertion

Answer 14

inserts onto theulnartuberosity, immediately distal to the elbow joint.

Question 15

Function

Answer 15

Flexes forearm at elbow joint

Question 16

Innervation

Answer 16

Musculocutaneous nerve is motor

Radial nerve is proprioceptive

Question 17

Arterial supply

Answer 17

Brachial artery

Radial recurrent artery

Question 18

Muscle in posterior compartment of forearm

Answer 18

Triceps brachiii

Question 19

Origin of triceps brachii

Answer 19

Long head – originates from the infraglenoid tubercle.

Lateral head – originates from thehumerus, superior to the radial groove.

Medial head – originates from the humerus, inferior to the radial groove.

Question 20

Insertion

Answer 20

Distally, the heads converge onto one tendon and insert into the olecranon of theulna.

Question 21

Innervation

Answer 21

Radial nerve

Question 22

Function

Answer 22

Extension of the arm at the elbow.

Question 23

In some individuals, the long head of the triceps brachii is innervated by the

Answer 23

Axillary nerve

Question 24

Arterial supply

Answer 24

Deep brachial artery