Sensory information

Question 1

What are the 5 types of sensors used by sensory neurons

Answer 1

Thermoreceptors
Mechanoreceptors
-Barroceptors
-Tactile
-propreoceptors
Nocioceptors

Question 2

Define the three different types of mechanoreceptors

Answer 2

Barroceptors: Detects changes in pressure or strech of visseral tudes
Tactile: Detects touch, streach, light pressure
propreoceptors: detects changes in limb position, using muscle spindle,

Question 3

What type of sensors are phasic and which are tonic

Answer 3

properoceptors: tonic
Tactile: Phasic (light touch, vibration) and Tonic (strech)
Thermoreceptors: Phasic
nociocpetors: Tonic

Question 4

which Neuron is the sensory neuron, what process does it undergo to create an action potential

Answer 4

The first neuron in the dorsal afferent system

Sensory transduction, the change of sensory inforamtion into an action potential

Question 4

What are the two types of sensors
classes

Answer 4

visceral: Things which are detected inside the body

somatic: Detected by muscle skin joints

Question 5

What are the 4 types of information encoded by neurons

Answer 5

Modality
Duration
Intensity
Location

Question 6

What information is duation linked with

Answer 6

Tonic: Slow adapting, constantly reciving small numbers of AP (Due to background sensation), responds to a changes in the freqency of AP
Phasic: Normally silent, will quickly send AP if information is present, Unless painful. Quickly adapts, to prevent (nocioceptors trigger)

Question 7

How do AP incode intensity

Answer 7

The number of ap determines intensity
Large number of AP high intensity
small number lower intensity

or more muscle recruitment

Question 8

What is used to encode the location

Answer 8

Receptive feilds, each feilds has 1 associated neuron. larger feilds lower sensitivity as there are less neurons per meter^2…
smaller feilds more densly packed neurons, more neurons in brain, larger area of the somatosensory cortex