Upper limb

Question 1

Rotator cuff muscles

Answer 1

-Supraspinatus, Infraspinatus, Teres Minor, Subscapularis
-Blend with the joint capsule  compress humeral head into glenoid fossa
Major Movements
* Abduction (supraspinatus)
* External rotation (infraspinatus and teres minor)
* Internal rotation (subscapularis)

Question 2

Deltoid

Answer 2

broad fan from humerus to the scapula and clavicle
produces shoulder flexion, abduction and extension

Question 3

Teres Major

Answer 3

attaches more anteriorly to humerus
–> internal rotation of the shoulder

Question 4

Anterior arm

Answer 4

bicep brachii, corabrachialis, brachialis
all cross over the anterior aspect of at least one joint and produce flexion

Question 5

RADIAL TUBEROSITY FROM BICEP BRACHII PRODUCES SUPINATION

Question 6

Arm posterior

Answer 6

triceps brachii
cross over posterior aspect of at least one joint to produce extension

Question 7

Forearm anterior compartment

Answer 7

• Attaches to carpals/ metacarpals = wrist flexor
• Attaches to digits = finger flexor
• Distal attachment into radius = pronator

Question 8

Forearm posterior compartment

Answer 8

• Attaches to carpals/ metacarpals = wrist extensor
• Attaches to digits = finger extensor

Question 9

Musculocutaneous nerve

Answer 9

Continuation of the lateral cord
-Pierces coracobrachialis to enter the anterior compartment of the arm
-Supplies the anterior compartment of the arm

Question 10

Median Nerve

Answer 10

-No branching in the arm
-Major supply for the anterior compartment of the forearm
-Minor supply of the hand musculature

Question 11

Ulnar nerve

Answer 11

Minor supply for the anterior compartment of the forearm
Major supply for the hand musculature

Question 12

Axillary nerve

Answer 12

wraps around the humerus posteriorly to supply the deltoid and teres minor

Question 13

Radial Nerve

Answer 13

significant supply to the posterior upper limb

Question 14

Major upper limb arteries

Answer 14

-Brachial artery is occluded during blood pressure readings
-Ulnar artery is the larger branch and principal supply for the forearm and hand
-Radial artery anastomoses with ulnar artery via palmar arches