Exam 2: Somato Sensory

Question 1

Mesissner

Answer 1

Flutter, Small R Field, Rapidly Adapting

Question 2

Pacinian

Answer 2

Vibration, LRF, Rapidly adapting

Question 3

Merkel

Answer 3

Pressure, SRF, Slowly adapting

Question 4

Ruffini

Answer 4

Stretch, LRF, Slowly adapting

Question 5

Raster Plot

Answer 5

displays the spiking activity of a group of neurons over time
Each row (y-axis) corresponds to the index of a neuron in a neuron group
Columns (x-axis) corresponds to the time

Question 6

Form Perception

Answer 6

Limiting factors for spatial acuity: Receptive field size, Innervation density

Question 7

Texture Perception

Answer 7

surfaces of different texture can be subjectively divided into groups that include slippery, rough, leathery, and wet. The perception of roughness has been studied most extensively. Most affected by the density and height of the individual surface elements.

Question 8

Vibration Perception

Answer 8

The tactile system easily discriminates mechanical vibrations. Divided into 2 separate sensations: flutter(under 40 Hz) vibration(over 40 Hz). Detection threshold is a U-shaped curve

Question 9

Relationship between 2-pt discrimination, spatial acuity

Answer 9

Two point discrimination. Spatial acuity: minimal separation between 2 points that permits each to be perceived separately