Day 7 - Glenohumeral

Question 1

Glenohumeral Joint Movements

Answer 1

Abduction
Adduction
Flexion
Extension
Horizontal Abduction
Horizontal Adduction
External Rotation
Internal Rotation
Diagonal Abduction
Diagonal Adduction
Circumduction

Question 2

Deltoid Muscle Function (Movements)

Answer 2

Anterior Fibers: abduction, flexion, horizontal adduction, and internal rotation

Middle Fibers: abduction

Posterior Fibers: abduction, extension, horizontal abduction, and external rotation

Question 3

Deltoid Origin and Insertion

Answer 3

O - anterior lateral third of clavicle, lateral aspect of acromion, inferior edge of spine of scapula

I - deltoid tuberosity on lateral humerus

Question 4

Pectoralis Major Functions (Movements)

Answer 4

Upper Fibers: flexion, internal rotation, adduction, and horizontal adduction

Lower Fibers: internal rotation, horizontal adduction, extension, and adduction

Question 5

Pecortalis Major Origin and Insertion

Answer 5

O - medial half of anterior surface of clavicle, anterior surface of costal cartilages of first six ribs

I - flat tendon 2-3 inches wide to lateral lip of intertubercular groove of humerus

Question 6

Latissimus Dorsi Functions (Movements)

Answer 6

adduction, extension, internal rotation, and horizontal abduction

Question 7

Latissimus Dorsi Origin and Insertion

Answer 7

O - posterior crest of ilium, back of sacrum and spinous processes of lumbar and lower six thoracic vertebrae

Question 8

Teres Major Functions (Movements)

Answer 8

Extension, internal rotation, and adduction

Question 9

Teres Major Origin and Insertion

Answer 9

O - inferior third of lateral border of scapula

I - medial lip of the inter tubercular groove of the humerus

Question 10

Coracobrachialis Functions (Movements)

Answer 10

flexion, adduction, and horizontal adduction

Question 11

Coracobrachialis Origin and Insertion

Answer 11

O - coracoid process of the scapula

I - middle of the medial border of the humeral shaft

Question 12

Rotator Cuff Muscles

Answer 12

Supraspinatus: abduction
Infraspinatus: external rotation
Teres Minor: external rotation
Subscapularis: internal rotation

Question 13

Subscapularis Muscle Functions

Answer 13

internal rotation
adduction
extension
stabilization of the humeral head in glenoid fossa

Question 14

Supscapularis Muscle Origin and Insertion

Answer 14

O - entire anterior surface of subscapular fossa

I - lesser tubercle of humerus

Question 15

Supraspinatus Muscle Functions

Answer 15

abduction
stabilization of the humeral head in glenoid fossa

Question 16

Supraspinatus Muscle Origin and Insertion

Answer 16

O - medial two-thirds of supraspinatus fossa

I - superiorly on greater tubercle of humerus

Question 17

Infraspinatus Muscle Functions

Answer 17

External Rotation
Horizontal Abduction
Extension
Stabilization of humeral head in the glenoid fossa

Question 18

Infraspinatus Muscle Origin and Insertion

Answer 18

O - posterior surface of scapula below spine

I - greater tubercle on posterior side

Question 19

Teres Minor Muscle Functions

Answer 19

external rotation
horizontal abduction
extension
Stabilization of humeral head in the glenoid fossa

Question 20

Teres Minor Origin and Insertion

Answer 20

O - posterior scapula, lateral border

I - greater tubercle of humor on posterior side

Question 21

Rotator Cuff Muscles and Main Function

Answer 21

1. Supraspinatus: abduction
2. Infraspinatus: external rotation
3. Teres Minor: external rotation
4. Subscapularis: internal rotation