Spinal Nerves and Testing

Question 1

somatic motor supply is voluntary T or F

Answer 1

T, so only skeletal muscle

Question 2

clinical somatic motor symptoms?

Answer 2

muscle stiffness, tightness, spasm
muscle weakness
ataxia

Question 3

common location of a CVA that would affect sensory function?

Answer 3

internal capsule next to the thalamus

Question 4

dorsal roots contain only __ information

Answer 4

sensory

Question 5

spinal nerves contain both sensory and motor information T or F

Answer 5

T

Question 6

if both sides of a dermatome are affected where would you suspect the lesion to be?

Answer 6

centrally

Question 7

C1 has no sensory components T or F

Answer 7

T

Question 8

how can you work out the dermatomes of the arm?

Answer 8

start with C5 and work round from superior arm round to armpit up to T2

Question 9

where is the location of the C2 dermatome

Answer 9

back of scalp and adams apple

Question 10

where is the location of the C3 dermatome

Answer 10

back of neck ad jugular notch

Question 11

where is the location of the C4 dermatome

Answer 11

clavicle and shoulder tip

Question 12

L1 dermatome?

Answer 12

groin (the whole area covered by your hands in your pockets)

Question 13

S3,4,5 dermatomal area location?

Answer 13

around the anus (S5 being closest)

Question 14

do anterior or posterior rami form plexuses?

Answer 14

anterior

Question 15

what is a named nerve

Answer 15

a nerve containing axons from 1 or mre spinal cord levels eg plexus nerves

Question 16

name the components of the cervical plexus

Answer 16

little goats tread softly

lesser occipital, great auricular, transverse cervical, supraclavicular

Question 17

where do the nerves of the neck connect?

Answer 17

the nerve point at the midpoint of the posterior border of SCM

Question 18

if someone has loss of sensation over the badge patch area, what 2 causes should you suspect?

Answer 18

is it dermatomal eg C5/6?

or is it an axillary nerve problem?

Question 19

where does referred pain in MI go to (nerve levels)?

Answer 19

T1 and T2

Question 20

dermatome level of pubic symphysis?

Answer 20

T12

Question 21

how would you be able to tell if a patients loss of sensation in the webbing of the toe is a dermatomal or deep fib nerve issue?

Answer 21

if theyve also lost sensation in the dorsum of the foot it will probably be the nerve (bigger area covered), if its just the web of the big toe (aka just the dermatome) it will be a dermatome problem

Question 22

if you suspect 1 nerve root has been disrupted in a myotome but not the others, how can you confirm this?

Answer 22

test the myotome on the other side, if its stronger it could mean one root has been disrupted

Question 23

lower motor neuron lesions cause spasticity/flaccidity

Answer 23

flaccidity

Question 24

upper motor neuron lesions cause

Answer 24

spasticity

Question 25

myotome for triceps brachii

Answer 25

C7

Question 26

myotome for biceps brachii

Answer 26

C6

Question 27

spinal level tested by knee jerk reflex

Answer 27

L3

Question 28

spinal level tested by ankle jerk reflex

Answer 28

S1

Question 29

how would you do a tendon test for C6

Answer 29

test brachioradialis function

Question 30

CNS dysfunction is more widespread than PNS dysfunction T or F

Answer 30

T

Question 31

why are athletes likely to get neuropathies?

Answer 31

they have muscle hypertrophy which can compress nerves

Question 32

cutaneous innervation of T2-T12 is supplied by...

Answer 32

intercostal nerves

Question 33

cutaneous innervation of the lower anterolateral trunk is supplied by...

Answer 33

iliohypogastric and ilioinguinal nerves

Question 34

subcostal nerve is the anterior ramus of what nerve?

Answer 34

T12

Question 35

the cervical plexus is formed by the anterior rami of what spinal nerves?

Answer 35

C1-C4

Question 36

what provides the cutaneous innervation to the posterior neck?

Answer 36

posterior rami of C2-C8

Question 37

what does the lesser occipital nerve supply?

Answer 37

the skin posterior to the ear

Question 38

the great auricular nerve supplies...

Answer 38

the skin over the angle of the mandible and the folds and lobe of the auricle

Question 39

which nerve provides cutaneous innervation to the anterior neck?

Answer 39

transverse cervical nerve

Question 40

what supplies the skin over the clavicle and shoulder?

Answer 40

supraclavicular nerves

Question 41

what happens when a peripheral nerve is stimulated?

Answer 41

AP generated by receptors in the area's dermatome and feeds its way back to the spinal cord via the posterior route (post = sensory)

Question 42

what does the cervical plexus innervate?

Answer 42

diaphragm via supraclavicular nerve | neck and postural strap muscles

Question 43

postural back muscles are supplied by posterior/anterior rami

Answer 43

posterior

Question 44

myotome for deltoid

Answer 44

C5

Question 45

myotome for anterior compartment of forearm

Answer 45

C8

Question 46

what does T1 myotome innervate?

Answer 46

dorsal interossei

Question 47

why is the L3 myotome tested in the knee jerk reflex?

Answer 47

L3 covers the extensor muscles of the thigh eg quadriceps femoris so shows that they're extending the leg properly

Question 48

which myotome is for knee flexion?

Answer 48

S2

Question 49

what muscles are tested in the L4 myotome and for what movement?

Answer 49

tibialis anterior | ankle dorsiflexion

Question 50

what muscles are tested in the L5 myotome?

Answer 50

extensor hallucis longus

Question 51

ankle plantarflexion (ankle jerk) can be tested using what myotome?

Answer 51

S1

Question 52

what muscle is involved in the ankle jerk reflex?

Answer 52

gastrocnemius