funnctions of muscles in the pectoral girdle and arm

Question 1

trapezius

Answer 1

upper = Elevate
Middle = Retract
Lower = Depress

Medially Rotates scapula during abduction above horizontal.

Question 2

Latissimus Dorsi

Answer 2

• Adducts arm
• Extends arm
• Medially Rotates ARM
• (flexion of arm from extended position)

Question 3

Levator Scapulae

Answer 3

• Elevates Scapula

- Medially rotates

Question 4

Rhomboid Minor

Answer 4

• Elevate Scapula
• Retract Scapula
• Medially Rotate Scapula

Question 5

Rhomboid major

Answer 5

• Elevate Scapula
• Retract Scapula
• Medially Rotate Scapula

Question 6

Supraspinatus

Answer 6

Abduction of arm to 15’

Question 7

Infraspinatus

Answer 7

-lateral rotation of arm

Question 8

Teres minor

Answer 8

• Lateral rotator of arm

- Adducts arm

Question 9

teres major

Answer 9

• medial rotator of arm
• extension of arm
• adducts arm

Question 10

subscapularis

Answer 10

• Medial rotator of arm

- adducts arm

Question 11

Pectoralis Major

Answer 11

• Flexion of arm
• Adducts arm
• Medially Rotates arm
• (extension of flexed arm)

Question 12

Pectoralis Minor

Answer 12

Protracts Scapula

Question 13

Deltoid

Answer 13

Abducts arm
Flexes arm (clavicular fibres)
Extends arm (Posterior fibres)