sensory-physio

Question 1

Glycine is antagonized by …

Answer 1

Strychnine

Question 2

Mechanism of action of GABA

Answer 2

Increase influx of cl and cause hyperpolarization inhibition

Question 3

Norepinephrine effects

Answer 3

Stimulatory on alpha 1Inhibitory in beta 2 receptors

Question 4

Effect of NO

Answer 4

Change intracellular metabolic function of the brain cells

Question 5

Glutamate and aspartate receptors

Answer 5

NMDA , AMPA and kinate receptors

Question 6

Muller’s law

Answer 6

Each receptor is specific to a certain stimulus and responds to it at low thersold• It can respond to non specific stimulus at high threshold by the same modality of sensation

Question 7

Weber-fechner law

Answer 7

Frequency of AP from receptor to afferent directly proportional to logarithm of intensity on the receptor • If Frequency from recpetor to afferent was 10/100/1000The stimulus intensity on receptor ll be 1/2/3 in order

Question 8

Skin over angle of mandible

Answer 8

Dermatome C2

Question 9

Skin over sternal angle

Answer 9

T2

Question 10

Skin around nipples

Answer 10

T 4

Question 11

Skin over xiphoid process

Answer 11

T 7

Question 12

Skin around umbilicus

Answer 12

T 10

Question 13

Skin around symphysis pubis

Answer 13

T 12

Question 14

Skin of axilla

Answer 14

T 1

Question 15

Epicritic sensation

Answer 15

Fine touch Fast pain Fine degrees of temperatureStereognosisDeep pressureVibration

Question 16

Protopathic sensations

Answer 16

Slow pain Crude touchCrude pressureWide degrees of temp.Itch and tickle

Question 17

Absence sites if nociceptors

Answer 17

BoneBrain Liver parenchyma Lung alveoli Visceral layer of internal organs

Question 18

Fast pain characters

Answer 18

A delta fibersOnly in skin No summationNT: glutamate Carried neo lateral spinothalamic tract

Question 19

Slow pain characters

Answer 19

Afferent: c fibersNT : substance pTract: Paleo lat. spinothalamicSummated

Question 20

1ry hyperalgesia

Answer 20

Mechanism: pain receptorsinflamed skin around an injury > non painful cause pain as touch Decreasing of thersold by chemical

Question 21

2ry hyperalgesia

Answer 21

Mechanism: convergence facilitatory theory in spinal cord Pain stimulus with normal thersold become more painful in Normal healthy skin

Question 22

Tic duoleureux

Answer 22

2ry hyperalgesiaSevere attack of pain of tg 5 and hypoglossal braches 9During laughing and swallowing like an electrical shock

Question 23

Dynamic proprioceptionReceptors

Answer 23

Pacinian corpuscles: phasic receptors to detect initial rate of movementRuffiniGolgiMuscle spindleJoint receptors

Question 24

Afferent of medial leminiscal pathway

Answer 24

A beta fibers