Trapezius

Question 1

Origin

Answer 1

• external occipital protuberance
• superior nuchal line
• nuchal ligament
• C7 spinous process
• 12 thoracic vertebrae spines

Question 2

Insertion

Answer 2

• lateral 1/3 of clavicle
• medial border of acromion
• scapular spine

Question 3

innervation

Answer 3

accessory nerve

Question 4

action

Answer 4

• elevates scapula
• retracts scapula (middle fibres)
• depresses scapula (lower fibres)
• rotates scapula during abduction of humerus

ERDR
elevates,retracts,depresses,rotates