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Anatomy Exam 3 > Axilla and Arm > Flashcards

Flashcards in Axilla and Arm Deck (77)
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1

What are the contents of the axilla?

Axillary artery, axillary vein and distal portion of the brachial plexus (all contained in the axillary sheath)

2

What are the boundaries of the axilla?

Anterior axillary fold- formed by pectoralis major

posterior axillary fold- formed by latissimus dorsi and teres major

*mid axillary line starts at the midpoint of the axilla and runs all the way down the torso

3

What are the main branches of the axillary artery

Part 1- superior thoracic a.

Part 2- Thoracoacromial a.
Lateral thoracic a.

Part 3- Subscapular a.
Anterior circumflex
humeral a.
Posterior circumflex
humeral a.

4

What artery runs with the long thoracic nerve?

lateral thoracic artery

5

What are the branches of the subscapular a?

circumflex scapular a.

thoracodorsal a.

6

What does the superior thoracic artery supply?

1st and 2nd intercostal spaces

7

What does the thoracoacromial a. supply?

pectoral muscles and deltoid

8

What does the lateral thoracic artery supply?

serratus anterior and pectoral muscles

9

What does circumflex scapular artery supply?

(branch off subscapular artery)

supplies scapular region

10

What does the thoracodorsal a. supply?

latissimus dorsi

11

What does the anterior circumflex a. supply?

shoulder and arm

anastomoses with posterior

12

What does the posterior circumflex a. supply?

shoulder and arm, anastomoses with anterior

13

What passes through the quadrangular space?

posterior circumflex humeral a. and axillary nerve.

14

What are the borders of the quadrangular space?

teres minor

teres major

humerus

long head of triceps

15

How can our body maintain blood flow to UE if axillary a. becomes occluded?

through the multiple anastomoses present around the shoulder

16

What are the major tributaries of the axillary vein?

cephalic vein

basilic vein

brachial veins

17

What is the brachial plexus?

network of nerves in the neck and axilla that gives rise to the nerves of the UE (including pectoral region)

ventral rami (C5-T1)

18

What are the roots of the brachial plexus? Where are they located?

Ventral rami of C5, C6, C7, C8 and T1

located in the neck

19

What are the trunks of the brachial plexus? Where are they located?

Superior (C5-C6)

Middle (C7)

Inferior (C8 and T1)

located in the neck

20

What are the division of the brachial plexus? Where are they located?

each trunk gives rise to a posterior and an anterior division

located deep to clavicle

21

What do the anterior divisions give rise to?

nerves of the anterior arm and forearm and palmar hand

22

What do the posterior divisions give rise to?

nerves of the posterior arm/forearm and dorsal hand

23

What are the cords of the brachial plexus?

Named for position relative to axillary artery

Lateral: formed by anterior divisions of superior and middle trunk (C5-C7)

Posterior: formed by posterior divisions of all trunks (C5-T1)

Medial: formed by anterior division of inferior trunk (C8-T1)

24

Where are the cords of the brachial plexus located?

distal to the clavicle

25

What are the 2 branches of the roots?

dorsal scapular nerve

long thoracic nerve

26

What does the dorsal scapular nerve innervate?

motor to levator scapulae and rhomboids

27

Where does dorsal scapular nerve travel?

with dorsal scapular a., medial to the medial border of the scapula

28

What does the long thoracic nerve innervate?

motor to serratus anterior

29

Where does long thoracic nerve travel?

with the lateral thoracic artery along the mid axillary line on the superficial surface of serratus anterior

30

What would a lesion of the long thoracic nerve result in?

winged scapula