Brachial Plexus

Question 1

What type of innervation does the brachial plexus supply

Answer 1

motor sensory and sympathetic

Question 2

what type of nerves make up brachial plexus

Answer 2

ventral rami of spinal nerves C5-T1

Question 3

What are the names for the structural components of the brachial plexus

Answer 3

Rami(roots), Trunks, Divisions, Cords, Branches

Question 4

What are the roots that supply brachial plexus

Answer 4

C5-T1 as exit respective intervertebral foramina in neck and upper thorax

Question 5

What are the trunks of the brachial plexus

Answer 5

Upper Middle and Lower

Question 6

What makes the upper trunk

Answer 6

C5 and C6

Question 7

What makes the middle trunk

Answer 7

continuation of C7

Question 8

What makes the lower trunk

Answer 8

C8 and T1

Question 9

What do the anterior divisions of the brachial plexus contribute to

Answer 9

lateral and medial cords

Question 10

what do the posterior divisions of the brachial plexus contribute to

Answer 10

extensions of all three trunks. forms posterior cord

Question 11

What is the first portion of brachial plexus in the axilla region

Answer 11

the cords

Question 12

What are the cords named for

Answer 12

relation to the axillary artery

Question 13

What forms the lateral cord

Answer 13

union of 2 anterior divisions from upper trunk and from middle trunk C567

Question 14

What forms the medial cord

Answer 14

direct continuation of the anterior portion of the lower trunkC8T1

Question 15

What forms the posterior cord

Answer 15

union of 3 posterior divisions. all spinal nerve roots participate. C5-T1

Question 16

What branches come off lateral cord

Answer 16

lateral pectoral nerve
contributary to median nerve
musculocutaneous nerve

Question 17

What levels does musculocutaneus nerve contain

Answer 17

C567

Question 18

What branches come off medial cord

Answer 18

medial pectoral n
medial brachial cutaneous nerve
medial antebrachial cutaneous nerve
contributary to median nerve
ulnar nerve

Question 19

What spinal nerves supply ulnar nerve

Answer 19

C8T1

Question 20

What branches off posterior cord

Answer 20

upper subscapular nerve, thoracodorsal nerve, lower sub scapular nerve, axillary nerve, radial nerve

Question 21

what innervates subscapularis

Answer 21

upper subscapular nerve

Question 22

what innervates lat dorsi

Answer 22

thoracodorsal nerve, known also as middle subscapular nerve

Question 23

what innervates subscapularis and trees major

Answer 23

lower subscapular nerve

Question 24

What does axillary nerve innervate. what cord levels does in contain

Answer 24

deltoid and teres minor C5 C6

Question 25

What are the two terminal branches of posterior cord

Answer 25

axillary nerve and radial nerve

Question 26

What does the radial n innervate

Answer 26

all muscles of the dorsal surface of the upper limb

Question 27

what does the median nerve innervate and what cord levels does it contain

Answer 27

central antebrachial mm and thenar m of hand. C5 inconsistently and C6-T1

Question 28

What are the terminal branches of brachial plexus

Answer 28

``` Musculocutaneous Ulnar Axillary Radial Median ```

Question 29

What are the supraclavicular branches from brachial plexusq

Answer 29

dorsal scap suprascap nerve to subclavius long thoracic nerve

Question 30

What levels does suprascap n have

Answer 30

C5 and C6

Question 31

What levels does nerve to subclavius contain

Answer 31

C5 and C6

Question 32

What ventral rami are contained in long thoracic nerve

Answer 32

C5 C6 C7

Question 33

T/F each ventral rams that participates in formation of brachial plexus receives gray rami communicans

Answer 33

true

Question 34

What is the dermatomal innervation of upper limb

Answer 34

C4-T3

Question 35

What innervates the dermatomes of shoulder

Answer 35

C4 from cervical plexus

Question 36

What innervates the anterior medial and posteromedial portion of upper arm

Answer 36

intercostobrachial cutaneous nerves T1 T2 and sometimes T3