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Flashcards in deltoids Deck (11)
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1
Q

What are the parts of the deltoid M.?

A

anterior
middle
posterior

2
Q

What is the origin and insertion of the anterior deltoid?

A

origin - lateral clavicle

insertion deltoid tuberosity

3
Q

What is the action of the anterior deltoid?

A

major flexor of arm

medial rotator of the arm

4
Q

What is the origin anne insertion of middle deltoid?

A

acromion to deltoid tuberosity

5
Q

What is the action of the middle deltoid?

A

major abductor

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

6
Q

What abducts the arm 0 to 15 degrees?

A

supraspinatus

7
Q

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

A

middle deltoid

8
Q

What is the origin and insertion of the posterior deltoid?

A

lateral scapula spine to deltoid tuberosity

9
Q

What is the action of the posterior deltoid?

A

weak extensor of the arm

slight lateral rotator

10
Q

What is the deltoid innervated by?

A

Axillary nerve

11
Q

What is the deltoids used for to test by clinicians?

A

the integrity of C5 nerve root

postaxillary nerve can be affected by upper brachial plexus injuries or fracture to surgical neck.