axilla

Question 1

where does the axilla begin/extend to?

Answer 1

begins right below the first rib

continues to the axillary fascia (lower attachment of clavipectoral fascia)

Question 2

anterior border of axilla is through:

Answer 2

pectoralis minor

Question 3

inferior border of axilla is:

Answer 3

along fascia between anterior part of pec major and back to lat muscle

Question 4

posterior border of axilla is:

Answer 4

along subscapularis muscle upwards to the top

Question 5

axillary sheath contains:

Answer 5

axillary artery
vein
brachial plexus

Question 6

axillary compression can be caused by … and can cause … b/c there is …

Answer 6

trauma / swelling / tumors / cysts

paralysis / paresthesia / ischemia

both arteries and nerves in the axillary sheath

Question 7

the brachial plexus is …

Answer 7

the motor and sensory innervation (nerve supply) from the shoulder to the fingertips

Question 8

the form of the brachial plexus is:

Answer 8

5 roots (top 2 + bottom 2 join to give us trunks)
|
V
3 trunks (each divide 2x to give divisions)
|
6 divisions (join together differently to make:)
|
3 cords (divide again and join in new ways for:)
|
5 terminal branches (exit the brachial plexus)

Question 9

nerves that come from the brachial plexus roots

Answer 9

4 names nerves

Question 10

nerves that come from the brachial plexus trunks

Answer 10

2 named nerves

Question 11

nerves that come from the brachial plexus divisions

Answer 11

none

Question 12

nerves that come from the brachial plexus cords

Answer 12

7 named nerves

Question 13

nerves that come from the brachial plexus terminal branches

Answer 13

none in brachial plexus; many after leaving plexus

Question 14

a “plexus” is …

Answer 14

any splitting and recombining of any structure

Question 15

lateral pectoral nerve goes to …

Answer 15

the pectoralis major

Question 16

the musculocutaneous nerve goes to …

Answer 16

the anterior arm

Question 17

medial antebrachial cutaneous nerve goes to

Answer 17

the forearm

Question 18

medial brachial cutaneous nerve goes to

Answer 18

arm (upper arm)

Question 19

medial pectoral nerve goes to … and innervates …

Answer 19

pectoralis major

innervates pectoralis minor

Question 20

sometimes there is a small extra branch that forms going to the ulnar nerve coming from …

Answer 20

C7 root

Question 21

axillary nerve is a … of the posterior cord

Answer 21

terminal branch

Question 22

posterior cord has 3 nerves branching off

Answer 22

lower subscapular nerve
upper subscapular nerve
thoracodorsal nerve

Question 23

radial nerve gets … roots

Answer 23

all of the levels of the roots!

C5, C6, C7, C8, T1

Question 24

dorsal scapular nerve branches off … and goes to …

Answer 24

C5 root

rhomboids and levators gap***

Question 25

long thoracic nerve branches off from … and goes to …

Answer 25

C5, C6, C7

serratus anterior

Question 26

nerve coming off the superior trunk is:

Answer 26

“nerve to subclavius”

Question 27

nerves can do these 3 things:

Answer 27

carry voluntary motor nerves / signals

carry sensory nerves / signals

have some autonomics mixed in there (involuntary motor [which is sympathetics and parasympathetics])

Question 28

2 sensory nerve patterns in our body:

Answer 28

dermatomes

peripheral sensory pattern

Question 29

dermatomes are

Answer 29

sensory innervation from one level (that formed in utero) ?

Question 30

peripheral sensory pattern is

Answer 30

sensory innervation carried by the peripheral nerves

Question 31

arteries are a lot more variable than …

Answer 31

nerves

Question 32

a myotome is …

Question 33

arteries are named by …

Answer 33

where they go to