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Flashcards in Neurophysiology Deck (22):
1

Where does the initial innervation of the tooth originate?

Sensory Trigeminal Ganglia

2

Development of dental innervation is tightly related to ____ and ____

The advancing tooth morphogenesis
Dental cell differentiation

3

During which stages of tooth development do the nerve fibers establish a nerve plexus beneath the apical foramina

Cap and Bell

4

Nerve fibers innervate the ____, the ____, and ____

Subodontoblastic layer
Coronal odontoblast layer
Predentin layer

5

What is the most common form of pain in the orofacial region

Odontologia

6

Which nerves evoke pain sensations?

Interdental nerves

7

What percentage of US adults do not seek routine dental care for fear of pain?

50%

8

Pulpal nerve fibers contain ____

Neuropeptides
- Calcitonin Gene-Related Peptide (CGRP)
- Substance P (SP)
- Neuropeptide Y
- Neurokinin A
- Vasoactive Intestinal polypeptide (VIP)

9

What causes neuropeptide release?

Tissue injury
Complement activation
Antigen-antibody reactions
Stimulation of the inferior alveolar nerve

10

Vasoactive peptides, Mechanical stimulation, and electrical stimulation produce vaso____

Vasodilation

11

Substance P and CGRP ____ and ____ and ____

Cause vasodilation
Contribute to hyperalgesia
Promote wound healing

12

How does the pulp react when insult causes activation of intradental nociceptors

Neurogenic vasodilation

13

Which nerve fibers function in motor and proprioception?

A-alpha

14

Which nerve fibers function in pressure and touch?

A-beta

15

Which nerve fibers function in motor to muscle spindles?

A-gamma

16

Which nerve fibers function in pain, temperature, touch?

A-delta

17

Which nerve fibers function in preganglionic autonomics?

B

18

Which nerve fibers function in pain only

C dorsal root

19

Which types of nerves innervate the pulp?

A-delta
C

20

A-delta fibers of the pulp are responsible for:

Having their nerve endings at the pulp-dentin border
Dentinal pain/sensitivity
Sharp, well localized pain

21

C fibers of the pulp are responsible for:

Heat sensitivity
Dull, poorly localized pain
Pain associated with tissue damage

22

What can alter the function of A-delta fibers?

Changes in microcirculation
- Decreased blood flow due to activation of sympathetic vasoconstrictor fibers depresses the dentinal responsiveness