Introduction to Local Anesthesia/ Neurophysiology Flashcards

1
Q

Words associated with dentistry:

A
  1. pain
  2. fear
  3. anxiety
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2
Q

Going to the dentist is the most fear of ___ % of adults

A

21%

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3
Q

In the US, approximately __% of the population avoid dental care due to fear

A

10%

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4
Q

The 10% of individuals that avoid the dentist due to fear comprise about ____ potential patients

A

30 million

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5
Q

The top 10 fear-evoking dental situations include:

A
  1. dentist is pulling your tooth
  2. dentist is drilling your tooth
  3. dentist tells you your teeth are bad
  4. dentist holds the needle in front of you
  5. dentist is gibing you a shot
  6. dentist places probe in a cavity
  7. dentist laughs as he looks at your mouth
  8. dentist squirts air into a cavity
  9. sitting in the waiting room
  10. dentist laying out instruments
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6
Q

What are the 10 desirable properties for local anesthesia:

A
  1. no irritation to tissue
  2. no permanent alteration
  3. low systemic toxicity
  4. effective if injected into tissue or mucous membranes
  5. short onset
  6. long enough duration of action for the procedure
  7. potent yet not harmfully concentrated
  8. no elicit allergic reaction
  9. readily undergo biotransformation
  10. sterile or capable of being sterilized by heat without deterioration
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7
Q

List the spectrum of pain and anxiety control in dentistry:

A
  1. local anesthesia
  2. oral sedation
  3. I.M. sedation
  4. nitrous oxide sedation
  5. I.V. sedation
  6. general anesthesia
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8
Q

What is the function/purpose of local anesthesia?

A

prevent generation and/ or conduction of a nerve impulse

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9
Q

Describe the pain pathway (1-4):

A
  1. pain receptors
  2. sensory nerve fiber
  3. nerve pathways
  4. response modulators
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10
Q

What are the response in the pain pathway?

A

thalamus, limbic system, and cortex

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11
Q

The least experience of pain which a subject can recognize:

A

pain threshold

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12
Q

The greatest level of pain which a subject is prepared to tolerate:

A

pain tolerance

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13
Q

Pain tolerance is lowest at around what times?

A

4pm and midnight

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14
Q

Pain tolerance is highest around what times?

A

early morning

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15
Q

When does pain threshold change throughout the day?

A

it remains constant

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16
Q

Label the following image:

A

a) CNS
b) trigeminal ganglion
c) foramen
d) nerve fiber
e) pain receptors

17
Q

Late the following image:

A

a) terminal aborization
b) Schwann cell
c) nodes of ranvier
d) free nerve endings
e) dendritic cell
f) axon
g) cell body

18
Q

Label the following image:

A

a) schwann cell
b) nodes of ranvier
c) myelin
d) axon
e) axoplasm
f) axolemma

19
Q

Label the following image:

A

a) axoplasm
b) axolemma

20
Q

Label the following image:

A

a) extracellular fluid
b) axolemma
c) pore
d) axoplasm

21
Q

Label whether the following ions are higher intracellularly or extracellularly:

  1. K+
  2. Na+
  3. Pr-
  4. Cl-
  5. HCO3-
A
  1. intracellular
  2. extracellular
  3. intracellular
  4. extracellular
  5. extracellular
22
Q

Based on the concentration gradient, K+ flows from:

A

intracellular —> extracellular

23
Q

Based on the electrical gradient, K+ flows from:

A

extracellular —> intracellular

24
Q

Based on the concentration gradient, Na+ flows from:

A

extracellular —> intracellular

25
Q

Based on the electrical gradient, Na+ flows from:

A

extracellular —> intracellular

26
Q

During the resting phase of nerve impulse transmission, the Na+ is:

A

closed

27
Q

What value represents the resting phase of nerve impulse control?

A

-70mV

28
Q

What happens to the Na+ gate when the fiber is stimulated?

A

Na+ gate opens and sodium enters

29
Q

What happens to the Na+ gate when the cell depolarizes?

A

Na+ gate closes

30
Q

What value represents a depolarized cell during nerve impulse transmission?

A

+20mV

31
Q
A