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Flashcards in deltoids Deck (11)
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1

What are the parts of the deltoid M.?

anterior
middle
posterior

2

What is the origin and insertion of the anterior deltoid?

origin - lateral clavicle
insertion deltoid tuberosity

3

What is the action of the anterior deltoid?

major flexor of arm
medial rotator of the arm

4

What is the origin anne insertion of middle deltoid?

acromion to deltoid tuberosity

5

What is the action of the middle deltoid?

major abductor
does not abduct until arm is 15 -30 degrees away from the body

6

What abducts the arm 0 to 15 degrees?

supraspinatus

7

What takes over abduction when the arm reaches 15-30 degrees?

middle deltoid

8

What is the origin and insertion of the posterior deltoid?

lateral scapula spine to deltoid tuberosity

9

What is the action of the posterior deltoid?

weak extensor of the arm
slight lateral rotator

10

What is the deltoid innervated by?

Axillary nerve

11

What is the deltoids used for to test by clinicians?

the integrity of C5 nerve root
postaxillary nerve can be affected by upper brachial plexus injuries or fracture to surgical neck.