midterm 2

Question 1

What are the 5 boarders of the axilla?

Answer 1

Anterior - pec major/minor
Post - Scapula and all muscles of scapula (supraspinatus to lat.dorsi)
Superior - Trapezius, clavicle, acromion
Lateral - humorous, deltoid, muscles attaching to humerus
Medial - ribs, serratus anterior

Question 2

What is the inferior boarder of axilla and why is it important?

Answer 2

There is none, vulnerable area

Question 3

What is an anastomoses?

Answer 3

coming together of 2 arteries

Question 4

What is collateral circulation?

Answer 4

Gets blood places when main artery is blocked/broken
- uses anastomoses

Question 5

What is the difference between a dermatomal chart and a sensory nerve chart?

Answer 5

Dermatomal chart - one level of nerve root innervation from spinal cord - ex. only C5 nerve root
Sensory nerve chart - can come from multiple spinal nerve roots but only one nerve, can include multiple dermatome areas

Question 6

What happens if the median nerve is compromised at the elbow?

Answer 6

Hand of benediction
- half of flexor digitorum profundus and all of flexor digitorum superficials lose innervation
- leads to digits 1,2,3 not being able to flex when asked to make a fist
- more deficit = more severe presentation

Question 7

What happens if the ulnar nerve is compromised at the wrist and at the elbow?

Answer 7

Ulnar claw
- at wrist, DAB’s and PAD’s and lumbricles 4,5 lose innervation which causes flexors to ‘win’, causes claw
- at elbow - flexor digitorum profundus 4,5, relaxes ulnar claw because they lose flexion, appears less severe
- more deficit = less severe presentation