muscle acction for DORSAL SCAPULAR REGION

Question 1

deltoid (clavicular part)

Answer 1

flexes and medially rotates arm

Question 2

deltoid (acromial)

Answer 2

abducts arms

Question 3

deltoids ( spinal part)

Answer 3

extends and laterally rotates arms

Question 4

pectoralis major

Answer 4

adduct arm

Question 5

pectoralis major (clavicular head)

Answer 5

flexes humerus

Question 6

pectoralis major (sternocostal head)

Answer 6

extends it from flexed position

Question 7

pectoralis minor

Answer 7

stabilizes scapula
when the scapula is fixed it assist to elevate the thorax during forced inhalation

Question 8

infraspinatus

Answer 8

externally rotates the shoulder
stabilizes the head of humerus in glenoid cavity

Question 9

teres major

Answer 9

adduct the shoulder
internally rotates the shoulder

Question 10

supraspinatus

Answer 10

initiates and assist deltoid in abduction of arm
stabilize the head of humerus in glenoid cavity

Question 11

teres minor

Answer 11

external rotation of shoulder
stabilize the humerus in glenoid cavity

Question 12

subscapularis

Answer 12

internally rotates the should
stabilize the head of humerus in glenoid cavity

Question 13

serratus anterior

Answer 13

protracts the scapular
upwardly rotates the scapula
holds it against the thoracic wall