Brachial/Cephalic Plexus

Question 1

what spinal cord levels make up the brachial plexus?

Answer 1

C5-T1

Question 2

brachial plexus supplies the ____ and ____ innervation to the ___ ____

Answer 2

motor and sensory innervation to upper limb

Question 3

order of brachial plexus (cords, branches, etc.)

Answer 3

roots
trunks
divisions
cords
branches
“Rugby Teams Drink Cold Beverages”

Question 4

roots of brachial plexus are the ___ ___ of C5-T1

Answer 4

ventral rami

Question 5

roots = ventral ___

Answer 5

rami

Question 6

C5-C8 roots course ___ associated vertebrae

Answer 6

above

8 C spinal nerves and only 7 C vertebrae

Question 7

each brachial plexus root has an associated ____ and ____

Answer 7

dermatome and myotome

Question 8

how many brachial plexus trunks are there? names?

Answer 8

3
upper (C5-6), middle (C7), lower (C8-T1)

Question 9

what trunk does the suprascapular nerve branch from?

Answer 9

upper trunk

Question 10

where do the roots/trunks of the brachial plexus exit?

Answer 10

between the anterior and middle scalene muscles

Question 11

how many divisions of the brachial plexus are there?

Answer 11

6

Question 12

anterior divisions of brachial plexus =
posterior divisions of brachial plexus =

Answer 12

anterior divisions of BP = flexors

posterior divisions of BP= extensors

Question 13

how many cords are there in the brachial plexus?

Answer 13

three

lateral
medial
posterior

Question 14

study

Question 15

what spinal cord levels make the cervical plexus?

Answer 15

C1-C4

Question 16

Question 17

study

Question 18

cutaneous branches of the cervical plexus (4)

Answer 18

lesser occipital n.
great auricular n.
transverse cervical n.
supraclavicular n.

Question 19

what is a plexus?

Answer 19

ventral rami joining and collectively innervating a region

brachial plexus - upper limbs

Question 20

what froms a plexus?

Answer 20

ventral rami

Question 21

Answer 21

red: sensory
purple: motor (diaphragm)
green: mostly motor

Question 22

What’s the first muscle that you need to remove to see the cervical plexus?

Answer 22

platysma

Question 23

as we descend the cervical region, do the ventral rami get bigger or smaller?

Answer 23

bigger

Question 24

sensory branches = _____ to SCM
motor branches = _____to SCM

Answer 24

sensory = superficial to SCM
motor = deep to SCM

Question 25

cutaneous branches of the cervical plexus

Answer 25

lesser occipital n greater auricular n transverse cervical n supraclavicular n

Question 26

what spinal level do the cutaneous branches belong to? lesser occipital n greater auricular n transverse cervical n supraclavicular n

Answer 26

lesser occipital n (C2) greater auricular n (C2, C3) transverse cervical n (C2, C3) supraclavicular n (C3, C4)

Question 27

greater occipital n = lesser occipital n =

Answer 27

greater occipital n = dorsal rami lesser occipital n = ventral rami

Question 28

what levels do the greater, lesser, and least occipital nerves come from?

Answer 28

greater and lesser from C2 least from C3

Question 29

what levels do the greater and lesser occipital nerves come from?

Answer 29

BOTH from C2 greater is a dorsal rami lesser is ventral rami

Question 30

motor nerves of the cervical plexus

Answer 30

- thyrohyoid - geniohyoid - ansa cervicalis -- superior and inferior roots - superior belly of omohyoid - sternothyroid - sternohyoid - inferior belly of omohyoid

Question 31

ansa cervicalis: superior root comes from level ___

Answer 31

C1

Question 32

ansa cervicalis: inferior root comes from levels ___

Answer 32

C2 and C3

Question 33

phrenic nerve comes from what levels

Answer 33

C3 C4 C5

Question 34

what are the three nerves of the brachial plexus (that I need to know)?

Answer 34

medial ulnar radial

Question 35

what do the brachial plexus nerves do?

Answer 35

medial: flex wrist, thumb, and digits (minus pinky) *carpal tunnel ulnar: flex pinky/ring finger and wrist *funny bone radial: extend arm, elbow, wrist

Question 36

Answer 36

Question 37

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Question 38

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Question 39

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Question 40

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Question 41

Question 42

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Question 43

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Question 44

Answer 44