Upper Limb Revision

Question 1

How many muscles are in the pectoral region

Answer 1

4

Question 2

How many muscles are in the shoulder region

Answer 2

11

Question 3

How many muscles are in the arm, forearm, Hand

Answer 3

4,20,17

Question 4

Classify the muscles of the hand

Answer 4

Intrinsic muscles, interrosei

Question 5

What’s the most superficial muscle in the pectoral region

Answer 5

Pectoralis major

Question 6

What forms part of the anterior wall of the axilla region

Answer 6

Pectoralis major and minor

Question 7

Origin and insertion of pectoralis major

Answer 7

Origin;Clavicle, sternocostal head

Insertion;Intertubercular groove of humerus

Question 8

What muscle offers minor protection to underlying Neuro vascular structures

Answer 8

Subclavius

Question 9

What are the actions of trapezius muscle

Answer 9

Upper fiber, middle, lower fibers

Question 10

What’s the innervation to the trapezius

Answer 10

Accessory nerve, proprioceptive fibers from C3 and C4 spinal nerves

Question 11

What group of muscle is also known as scapulohumeral group

Answer 11

Intrinsic shoulder muscle

Question 12

What are the actions of latissimus dorsi?

Answer 12

Extends, adducts and medially rotates the upper limb

Question 13

What’s the innervation to the deep extrinsic muscles of the shoulder region

Answer 13

Dorsal scapular nerve

Question 14

What are the four areas of origin of the Latissimus Dorsi

Answer 14

Spinous process T6-T12
Iliac crest
Thoracolumbar fascia
Inferior three ribs

Question 15

Origin and insertion of trapezius muscle

Answer 15

Skull, nuchal ligament, spinous process.

Clavicle, acromion, scapular spine

Question 16

What muscle forms the inferior border of the quadrangular space

Answer 16

Teres Major

Question 17

Quadrangular space is the gap that the ——————— and ———————- pass through to reach the ———————

Answer 17

Axillary artery, posterior circumfex humeral artery, posterior scapular

Question 18

Origin of biceps brachii

Answer 18

Coracoid process of scapular

Supraglenoid is tubercle of scapular

Question 19

What muscle is a weak adductor

Answer 19

Coracobrachialis

Question 20

The biceps tendon reflex tests what spinal cord segment

Answer 20

C6

Question 21

What muscle of the arm is located more distally than the other muscles of the arm

Answer 21

Brachialis

Question 22

Origin of Triceps brachii

Answer 22

Infraglenoid tubercle, humerus(superior and inferior to the radial groove)

Question 23

A tap on the triceps tendon tests what spinal segments

Answer 23

C7

Question 24

What muscle is the principal supinator of the elbow joint?

Answer 24

Biceps brachii

Question 25

Brachial pulse can be palpated immediately medial to what?

Answer 25

Biceps tendon

Question 26

Where does Levantine scapulae originate from and insert into
Innervation
Action

Answer 26

C1-C4 inserts into the medial border of the scapular
Dorsal scapular
Elevates the scapular

Question 27

What is the action of Latissimus dorsi

Answer 27

Extends, adducts, medially rotates

Question 28

Origin, insertion, nerve supply, action of rhomboid major and minor

Answer 28

Major
T2-T5 inserts into medial aspect of the scapular between the inferior angle and spine
Dorsal scapular
Retracts and rotates scapular

Minor
T1-T2 inserts into the medial aspect of the scapular at the level of the spine of the scapular
Action and nerve supply is same as major

Question 29

Intrinsic and extrinsic muscles of the shoulder have other names what are they?

Answer 29

Intrinsic-Scapulohumeral

Extrinsic-superficial back muscles

Question 30

Intrinsic muscles of the shoulder are said to originate from where and insert where?

Answer 30

Origin;Scapular and or clavicle

Insert:Humerus

Question 31

Extrinsic muscles of the shoulder are said to originate from where and insert into where?

Answer 31

Origin:Trunk
Insertion:Humerus, scapular, clavicle

Question 32

What is the quadrangular space and what forms it’s inferior border

Answer 32

It is the gap that the axillary nerve and posterior humeral circumflex artery pass through to reach the posterior scapular region
The teres major forms it’s inferior border

Question 33

Origin and insertion of deltiod
Innervation
Action

Answer 33

Originates from the scapular and clavicle inserts into the deltoid tuberosity on the lateral surface of the humerus
Axillary artery
Action:Anterior fibers, Flexion and medial rotation
Posterior fibers, Extension and lateral rotation
Middle fibers:Main abductors of the arm take over from supraspinatus after abducting 15 degrees

Question 34

Teres major origin, insertion, innervation, action

Answer 34

Posterior aspect of the inferior angle of scapular and inserts into the medial lip of the Intertubercular groove of humerus
Lower subscapular nerve
Adduct at the shoulder and medially rotates the arm

Question 35

Origin and insertion of Supraspinatus
Innervation
Action

Answer 35

Supraspinous fossa inserts into greater tubercle of humerus
Suprascapular nerve
Abducts arm 0-15 degrees

Question 36

Origin, insertion, action, innervation

Answer 36

Infraspinous fossa, greater tubercle of humerus
Laterally rotates arm
Suprascapular nerve

Question 37

Origin, insertion, action, innervation of subscapularis

Answer 37

Subscapular fossa, lesser tubercle of humerus, medially rotates the arm, lower and upper subscapular nerve

Question 38

Origin, insertion, innervation, action of teres minor

Answer 38

Posterior surface of scapular, adjacent to its lateral border
Insertion;Greater tubercle of humerus
Innervation:Axillary nerve
Actions:Laterallly rotates the arm