Shoulder Girdle

Question 1

Upper Trapezius

Answer 1

O: occipital bone, nuchal ligament on upper cervical spinous processes
I: outer third of clavicle, acromion process
A:scapular elevation and upward rotation
I: spinal accessory (CN XI), C3 and C4 sensory component

Question 2

Middle Trapezius

Answer 2

O: spinous process of C7 thru T3
I: scapular spine
A: scapular retraction
I: Spinal accessory (CN XI), C3 and C4 sensory component

Question 3

Lower Trapezius

Answer 3

O:Spinous processes of middle and lower thoracic vertebrae
I: Base of scapular spine
A: Scapular depression and upward rotation
I: Spinal accessory (CN XI), C3 and C4 sensory component

Question 4

Levator Scapula

Answer 4

O: Transverse processes of first four cervical vertebrae
I: Vertebral border of scapula between the superior angle and spine
A: scapular elevation and downward rotation
I: third and fourth cervical nerves and dorsal scapular nerve (C5)

Question 5

Rhomboids

Answer 5

O: spinous processes of C7 thru T5
I: vertebral border of scapula between the spine and inferior angle
A: scapular retraction, elevation, downward rotation
I: Dorsal scapular N. (C5)

Question 6

Serratus Anterior

Answer 6

O:Lateral surface of the upper eight ribs
I: vertebral border of the scapula anterior surface
A: Scapular protraction and upward rotation
I: long thoracic n. (C5, C6, C7)

Question 7

Pectoralis Minor

Answer 7

O: anterior surface, third thru fifth ribs
I: coracoid process of the scapula
A: scapular depression, protraction, downward rotation, and tilt
I: Medial pectoral n. (C8, T1)