1.5 PHYSIOLOGY - Sensory Flashcards Preview

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Flashcards in 1.5 PHYSIOLOGY - Sensory Deck (24):
1

Potential in triggering a sensory receptor

Generator Potential / Receptor Potential

2

Generator potentials trigger

Action potential trains

3

3 Characteristics of Sensory receptors. Define each.

1. Differential Sensitivity - "specific sensations, specific receptors"
2. Labeled Line Principle - "specific sensations, specific pathways"
3. Adaptation - change in a way the receptor responds to sequential or prolonged stimulation

4

2 Types of adaptation

1. Slowly adapting receptors
2. Rapidly adapting receptors

5

Slowly adapting receptors

TONIC receptor
continuous stimulus strength (detects steady stimulus)

6

Examples of slowly adapting receptors

Muscle spindle, Golgi Tendon, Slow pain, Baroreceptor, Chemoreceptor

7

Rapidly adapting receptors

PHASIC receptor ("Mabilis magsawa")
for detecting change in stimulus strength
detects onset and offset of stimulus
Predictive function

8

Examples of rapidly adapting receptors

Pacinian corpuscle

9

Region of the skin where stimuli can change the firing rate of the sensory neurons

Receptive Field

10

2 types of Receptive Field

Type 1 - smaller RF with well-defined border
Type 2 - wider RF with poorly-defined border

11

Non-hairy skin

Glabrous skin

12

Iggo Dome receptors

Merkel's Disc

13

Onion-like structure

Pacinian Corpuscles

14

Sensory encoded of free nerve endings

Touch and temperature

15

tactile receptor in glabrous skin (esp fingertips and lips)

Meissner's corpuscles

16

Tactile receptor for continuous touch, localizing touch sensation and determine texture

Merkel's disc

17

Detects high frequency vibration

Pacinian Corpuscles

18

Receptor located in deep skin, internal tissues, and joint capsules. Multi-branched, encapsulated, and slowly-adapting

Ruffini's end organs

19

Encodes movement of objects and low frequency vibrations

Meissner's corpuscle

20

Identify the type of receptor and receptive field.

Meissner's Corpuscle

FA1

21

Identify the type of receptor and receptive field.

Merkel's Disc

SA1

22

Identify the type of receptor and receptive field.
Ruffini's end organs

SA2

23

Identify the type of receptor and receptive field.

Pacinian Corpuscles

FA2

24

Identify the first-4th order neuron in the sensory pathways

Sensory receptors
1st order: Cell body: dorsal Root or Cranial Nerve Ganglia
2nd order: spinal cord or brainstem
3rd: thalamus
4th: sensory cortex