Shoulder Musculature

Question 1

Serratus Anterior Origin and Insertion

Answer 1

Origin: Ribs 4-12
Insertion: Medial border of the scapula

Question 2

Serratus Anterior Isolated and Integrated Functions

Answer 2

Isolated Function: Concentrically accelerates scapular protraction
Integrated Function:Eccentrically decelerates dynamic scapular retraction, isometrically stabilizes the scapula

Question 3

Rhomboid Major Origin and Insertion

Answer 3

Origin: Spinous processes C7-T5
Insertion: Medial border of the scapula

Question 4

Rhomboid Major Isolated and Integrated Functions

Answer 4

Isolated Function: concetrically produces scapular retraction and downward rotation
Integrated Function:eccentrically decelerates scapular protraction and upward rotation, isometrically stabilizes the scapula

Question 5

Rhomboid Minor Origin and Insertion

Answer 5

Origin: spinous processes C7-T1
Insertion: medial border of hte scapula superior to spine

Question 6

Rhomboid Minor Isolated and Integrated Functions

Answer 6

Isolated Function: concentrically produces scapular retraction and downward rotation
Integrated Function:eccentrically decelerates scapular protraction and upward rotation, isometrically stabilizes the scapula

Question 7

Lower Traps Origin and Insertion

Answer 7

Origin: Spinous processes of T6-T12
Insertion: Spine of the scapula

Question 8

Lower Traps Isolated and Integrated Functions

Answer 8

Isolated Function: Concentrically accelerates scapular depression
Integrated Function: Eccentrically decelerates scapular elevation, isometrically stabilizes the scapula

Question 9

Middle Traps Origin and Insertion

Answer 9

Origin: Spinous processes of T1-T5
Insertion: Acromion process of the scapula, superior aspect of the spine of the scapula

Question 10

Middle Traps Isolated and Integrated Functions

Answer 10

Isolated Function: concentrically accelerates scapular retraction
Integrated Function: eccentrically decelerates scapular elevation, isometrically the scapula

Question 11

Upper Traps Origin and Insertion

Answer 11

Origin: external occipital protuberance of the skull, spinous process of C7
Insertion: lateral third of the clavicle, acromion process of the scapula

Question 12

Upper Traps Isolated and Integrated Functions

Answer 12

Isolated Function: concentrically accelerates cervical extension, lateral flexion, and rotation, concentrically accelerates scapular elevation
Integrated Function: eccentrically decelerates cervical flexion, lateral flexion, and rotation, eccentrically decelerates scapular depression, isometrically stabilizes the cervical spine and scapula

Question 13

Pec Major Origin and Insertion

Answer 13

Origin: Anterior surface of the clavicle, anterior surface of the sternum, cartilage of ribs 1-7
Insertion: Great tubercle of the humerus

Question 14

Pec Major Isolated and Integrated Functions

Answer 14

Isolated Function: concentrically accelerates shoulder flexion, horizontal adduction and internal rotation
Integrated Function: eccentrically decelerates shoulder extension, horizontal abduction, and external rotation, isometrically stabilizes the shoulder girdle

Question 15

Pec Minor Origin and Insertion

Answer 15

Origin: lateral third of the clavicle
Insertion: deltoid tuberosity of the humerus

Question 16

Pec Minor Isolated and Integrated Functions

Answer 16

Isolated Function: concentrically accelerates should flexion and internal rotation
Integrated Function: eccentrically decelerates shoulder extension and external rotation, isometrically stabilizes the shoulder girdle

Question 17

Anterior Deltoid Origin and Insertion

Answer 17

Origin: Lateral third of the clavicle
Insertion: deltoid tuberosity of the humerus

Question 18

Anterior Deltoid Isolated and Integrated Functions

Answer 18

Isolated Function: concentrically accelerates shoulder flexion and internal rotation
Integrated Function: eccentrically shoulder extension and external rotation, isometrically stabilizes the shoulder girdle

Question 19

Medial Deltoid Origin and Insertion

Answer 19

Origin: acromion process of the scapula
Insertion: deltoid tuberosity of the humerus

Question 20

Medial Deltoid Isolated and Integrated Functions

Answer 20

Isolated Function: concentrically accelerates shoulder abduction
Integrated Function: eccentrically decelerates shoulder adduction, isometrically stabilizes the should girdle

Question 21

Posterior Deltoid Origin and Insertion

Answer 21

Origin: spine of the scapula
Insertion: deltoid tuberosity of the humerus

Question 22

Posterior Deltoid Isolated and Integrated Functions

Answer 22

Isolated Function: concentrically accelerates shoulder extension and external rotation
Integrated Function: eccentrically decelerates shoulder flexion and internal rotation, isometrically stabilizes the shoulder girdle

Question 23

Teres Major Origin and Insertion

Answer 23

Origin: inferior angle of the scapula
Insertion: lesser tubercle of humerus

Question 24

Teres Major Isolated and Integrated Functions

Answer 24

Isolated Function: concentrically accelerates shoulder internal rotation adduction, and extension
Integrated Function: eccentrically decelerates shoulder external rotation, abduction, and flexion, isometrically stabilizes the shoulder girdle