VII - Sensory Physiology Flashcards Preview

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Flashcards in VII - Sensory Physiology Deck (185)
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1

Provides information to the CNS about the state of the body and/or the immediate environment

Sensation

2

Specialized epithelial cells or neurons that transduce environmental signals into neural signals

Sensory Receptors

3

Change in membrane potential produced by the stimulus, triggers action potential trains

Generator/Receptor Potential

4

Specific sensations, specific receptors

Differential Sensitivity

5

Specific sensations, specific pathways

Labeled Line Principle

6

Change in a way a receptor responds to sequential or prolonged stimulation

Adaptation

7

Slowly-adapting, for continuous stimulus strength, detects steady stimulus

Tonic Receptors

8

Rapidly-adapting, for detecting change in stimulus strength, detects onset and offset of stimulus, predictive function

Phasic Receptors

9

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

Receptive Field

10

Receptive Field: Smaller with well-defined borders

Type 1

11

Receptive Field: Wider with poorly-defined borders

Type 2

12

Free Nerve Endings: Location

skin

13

Free Nerve Endings: Sensation

touch, pressure, pain

14

Meissner's Corpuscles (FA1): Location

non-hairy/glabrous skin. fingertips, lips

15

Meissner's Corpuscles (FA1): Sensation

movement of objects, low-frequency vibration

16

Expanded tip tactile receptor, combine to form Iggo Dome Receptors

Merkel's Disk (SA1)

17

Merkel's Disk (SA1): Sensation

steady-state signals for continuous touch, localizing touch, texture

18

Hair-end Organ: Location

hair base

19

Hair-end Organ: Sensation

movement of object

20

Multi-branched, encapsulated, slowly-adapting receptors

Ruffini's End Organs (SA2)

21

Ruffini's End Organs (SA2): Location

deep skin, internal tissues, joint capsules

22

Ruffini's End Organs (SA2): Sensation

heavy, prolonged touch (pressure), degree of joint rotation

23

Onion-like receptors

Pacinian Corpuscles (FA2)

24

Pacinian Corpuscles (FA2): Location

skin, deep fasia

25

Pacinian Corpuscles (FA2): Sensation

high-frequency vibration

26

Transduces stimulus to electrical signal

Sensory Receptors

27

Sensory Pathway: Dorsal root or cranial nerve ganglia

First-Order Neurons

28

Sensory Pathway: Spinal cord or brainstem

Second-Order Neurons

29

Sensory Pathway: Thalamus

Third-Order Neurons

30

Sensory Pathway: Sensory cortex

Fourth-Order Neurons