Neurophysio

Question 1

Primary obj of dentists

Answer 1

Relief of pain

Question 2

Ultimate obj

Answer 2

Removal of the cause of pain

Question 3

Dual components of pain differentiate

Answer 3

Pain perception - physioana uniform in all healthy indi

Pain reaction - psycho physio. varies

Question 4

Factors affecting pain reaction

Answer 4

Sex 
Age
Nationality
Race
Fear and apprehension
Emotional state
Fatigue

Question 5

Types of nerve cells

Answer 5

Sensory

Motor

Question 6

Conducts msgs from peripheral tissues (skin or mm) to cns

Res for perception of pain, pressure, temp, taste

Answer 6

Sensory or afferent nerve

Question 7

Receptor for pain

Answer 7

Chronic- c fiber

Acute - a delta

Question 8

Pressure

Answer 8

Pacinian

Question 9

Touch

Answer 9

Meissners

Question 10

Transmits commands from cns to periphery (effetor organ)

- res for muscle movt and epinephrine release

Answer 10

Motor

Question 11

Nerve conduction happens for

Answer 11

1 millisecond

Question 12

It is a self propagated passage of an elec impulse along nerve fibers

Answer 12

Nerve conduction

Question 13

Major steps in nerve conduction

Answer 13

Resting potential
Depolarization
Repolarization

Question 14

All 6 steps in nerve conduction

Answer 14

Resting potential
Depolarization
Slow depo
Threshold potential or firing potential
Rapid depo
Repolarization

Question 15

Substeps of depo

Answer 15

Slow
Threshold potential
Rapid

Question 16

Nerve at rest has _____ mV

Answer 16

-70 to -90mV

Question 17

During resting potential: nerve membrane is polarized

Answer 17

PONI or PISO

Question 18

Are responsible for the resting potential

Are the result of selec exhibited by the nerve in resting stage

Answer 18

Intracellular extracellular conc of ions

Question 19

Slightly permeable

Inc conc extracellularly

Answer 19

Na

Question 20

Freelypermeable

Answer 20

K

Question 21

What is depo

Answer 21

When an adequate stimulus is applied, the memb is activated

Question 22

Elec potential inside the nerve becomes slightly less negative

Answer 22

Slow depo

Question 23

When falling elec potential reaches critical lvl

Answer 23

Threshold potential

Question 24

mV of threshold potential

Answer 24

-50 to -60mV

Question 25

Results in the reversal of the electrical....

Answer 25

Rapid depo

Question 26

Occurs after depo

Answer 26

Repo

Question 27

The elec potential gradually becomes more negative inside the cell relative to the outside until the orig resting potential of -70mV is achieved again

Answer 27

Repo

Question 28

Nerve is unable to respond to another stimulus regardless of its strength after the 1st stimulus

Answer 28

Absol ref period

Question 29

New impulse can be initiated but only by a STRONGER one

Answer 29

Rel ref period

Question 30

Depo takes

Answer 30

0.3ms

Question 31

Repo takes

Answer 31

0.7msec

Question 32

Slow forward creeping process

Answer 32

Unmye nerve

Question 33

Current leaps from node to node, a process termed saltatory conduction

Answer 33

Mye nerve

Question 34

How do local anes chuchu 4 ways

Answer 34

Altering the basic rp of the nerve memb Alt the threshold pot Dec the rate of depo Prolonging the rate of repo

Question 35

Specificity theory by

Answer 35

Rene descartes

Question 36

Spec theory modified by

Answer 36

Muller | Vonfrey

Question 37

Trans of pain via straight through channels from the skin to the brain, lesions or injury must be present

Answer 37

Spec theory

Question 38

Modified by muller

Answer 38

Spec theory | Via sensory nerves

Question 39

Accdg to him there are specific cutaneous receptors for the mediation of touch pain temp pressure Postulated the idea of a PAIN CENTER

Answer 39

Von frey

Question 40

Pattern of nerve impulses are gen as a result of SUMMATION of sensory input within the dorsal horn of the spinal column, when this exceed a criticsl levl pain is produced By

Answer 40

Pattern theory by Goldscheider

Question 41

Touch plus pressure plus heat = pain

Answer 41

Pattern theory

Question 42

Provided a neural basis Reconciled the spec and pattern By

Answer 42

Gate control theory | By melzack and wall

Question 43

Pain fibers

Answer 43

A delta C fibers * a beta

Question 44

Small unmye fibers Slow Chronic or dull pain

Answer 44

C fiber

Question 45

Speed of c fiber

Answer 45

0.5 to 2 meters per second

Question 46

Medium mye fibers Fast 1st pain acute sharp pain

Answer 46

A delta

Question 47

Speed of a delta

Answer 47

100m/s

Question 48

Closes the gate no pain

Answer 48

A delta | C fiber

Question 49

Opens the gate with pain

Answer 49

A beta

Question 50

Large mye fiber | Conduct touch and pressure

Answer 50

A beta

Question 51

Speed of a beta

Answer 51

3-14m/s

Question 52

What is pain

Answer 52

Unpleasant sensory and emotional experience usually initiated by an actual or potential tissue damage and transmitted over a coor neural network to the cns where it is interpreted as such