Numbness

Question 0

agnosia (steroagnosia)

Answer 0

inabilty to recognize what a sensation is despite relatively normal perception of sensation

when tactile- steroagnosia

Question 1

Conscious Proprioception

Answer 1

ability to tell where a body part is in space

-largely based on joint position sense

Question 2

graphesthesia

Answer 2

ability to identify letters or figures traced on skin (without looking)

Question 3

dermatome

Answer 3

area of skin supplied by nerve root

Question 4

sclerotome

Answer 4

area of bone and joints supplied by a single nerve root

Question 5

mytome

Answer 5

muscles supplied by a single nerve root

Question 6

Radiculopathy

Answer 6

damage to a nerve root (radiculitis is irritation)

Question 7

myelopathy

Answer 7

damage to the spinal cord from any cause

Question 8

anesthesia/hypoesthesia

Answer 8

loss (or decrease) in sensation

Question 9

hyperpathia

Answer 9

exaggerated perception of normally painful stimulated

Question 10

allodynia

Answer 10

perception of normally innocuous stimuli as being painful

Question 11

hyperesthesia

Answer 11

excessive sensitivity to any modality

Question 12

dysesthesia

Answer 12

perception of pain when no stimulus is present

Question 13

paresthesia

Answer 13

abnormal perception of a sensation in the absence of any stimulus

Question 14

polyneuropathy

Answer 14

generalized damage to peripheral nerves; usually due to a systemic cause

Question 15

subjective

Answer 15

relies on patient’s report

Question 16

3 types of numbness

Answer 16

loss of sensitivty
distorted sensations
damage to NS/manifestation of an underlying painful condition

Question 17

loss of sensitivty due to

Answer 17

true damage of sensory pathways (anesthesia, hyperesthesia)

Question 18

distorted sensations

Answer 18

much broader dx- paresthesia (tingling)

Question 19

damage to NS/manifestation of an underlying painful condition

Answer 19

dysensthesia (perception of an underlying painful condition)

allodynia (perception of innocuous stimuli being painful)

Question 20

hysterical sensory loss

Answer 20

sensory changes that follow artificial boundaries such as hairline or jawline

Question 21

things to asscess

Answer 21

broad or vague
all modalities or selective
reflexes
nerve conduction studies

Question 22

temperature and pin prick

Answer 22

small diameter nerve fibers up STT

Question 23

vibration

Answer 23

large diameter, heavily myelinated nerve fibers and then dorsal column medial leniscus tracts

Question 24

one side of body

Answer 24

CNS damage

Question 25

one side of body, involves same side of face

Answer 25

above the pons

Question 26

line on body where below sensations are lost

Answer 26

spinal cord lesion

Question 27

numbness confined to specific nerve or nerve root

Answer 27

peripheral nerve or nerve root damage

Question 28

loss in upper limbs or upper part of trunk bilaterally with lower limbs and buttocks fine

Answer 28

expanding intraspinal mass

Question 29

numbness on one side of face

Answer 29

psych disease- perioral paresthesia (does not follow nerve dist) lateral part of brainstem or upper spinal cord (spinal tract of trigeminal) --can also produce sensory decrease on one side of head and on the opposite side of body

Question 30

progession: march of tingling

Answer 30

migraines, focal seizures of sensory cortex

Question 31

production of distal paresthesia by neck movement or particular neck positions

Answer 31

compressive lesions in cervical region (nerve root or spinal cord)

Question 32

awakening frm sleep with symptoms

Answer 32

local compression of nerve/compression of circulation in limb

Question 33

two etiologies of numbness

Answer 33

peripheral (more common) vs central

Question 34

what are peripheral nerve numbnesses like

Answer 34

assocaited with more localized symptoms and sharper borders between normal and abnormal

Question 35

causes of peripheral numbness

Answer 35

generalized/focal entrapment neuropathies (distal/symmetryical loss starting in feet) peripheral entrapment neuropathies radicuolpathies- small zones (because most dermatones overlap) brachial plexus lesions

Question 36

central numbness

Answer 36

bilateral symptoms with a sensory level below which sensation is lost due to damage of tract

Question 37

WHY CENTRAL NUMBNESS

Answer 37

extrinsic compression (extramedullary) conditions intrinsically damaging SC (intramedullary) above foramen magnum.. CV disease, tumors, MS, infectious [[these are usually unilateral --affecting contralateral side of body; transient]]