Trapezius

Question 1

Origin: Back of Skull

Answer 1

EOP : External Occipital Protuberance & Medial 1/3 of Superior Nuchal Line

Question 2

Origin: Back of Neck

Answer 2

ligamentum nuchae and spine of 7th cervical vertebrae

Question 3

Origin: Back of Thorax

Answer 3

Spines of all thoracic vertebrae and their supraspinous ligaments

Question 4

Insertion: Upper Fibres

Answer 4

Inserted into lateral third of clavicle

Question 5

Insertion: Middles Fibres

Answer 5

Inserted into acromion and upper lip of crest of spine of scapula

Question 6

Insertion: Lower Fibres

Answer 6

Inserted into rough tubercle on crest of spine of scapula near root of spine

Question 7

Nerve Supply

Answer 7

Motor: Spinal Root of Accessory Nerve
Sensory: Cervical Nerves # 3 & 4

Question 8

Action
As A Whole
Upper & Lower Fibres
Middle Fibres

Answer 8

As A Whole: Maintains Level of Shoulder
Upper & Lower Fibres: Rotate Scapula so Glenoid Cavity looks Upward
Acts w/ Rhomboids: Middle Fibres: Retract Scapula and Brace Back Shoulder

Question 9

Paralysis results in

Answer 9

Shoulder Drop