6 - sensation

Question 1

Nociception are a subtype of the skin, receptor that is involved in

Answer 1

Pain and temperature perception

Question 2

Mechanoperception, subsystem of the skin, receptor is involved in

Answer 2

Touch perception

Question 3

Rate coding

Answer 3

Number of AP’s per time unit code for strength of stimulus

Question 4

Sensory adaptation (principle of sensory system)

Answer 4

Firing rate of neuron decreases as time progresses, even though the stimulus is constant.

Question 5

Intensity coding (principle of sensory system)

Answer 5

The firing rate of cells increase when a stimulus becomes more intense

Question 6

Range fractionation (principle of sensory system)

Answer 6

One receptor cannot cover a whole fraction range.

Different type of receptors cover for different stimulus intensity sensitivities (So different light intensity)

Question 7

Integration

Answer 7

Multiple neuron receptors cover different (e.g. light) intensities. They feed into 1 next neuron which sums it all up and then covers the whole range.

So
- 1 neuron does not cover a whole range
- Multiple are needed to cover and then are combined

Question 8

Dermatome

Answer 8

Patch of the skin that maps to a specific part in the spine

Question 9

Top down processing

Answer 9

Can influence what the thalamus communicates to hersenschors about the senses.
It can put emphasis or de-emphasise on e.g. sounds

Question 10

Decussation

Answer 10

CROSSING OVER OF INFORMATION

Info crosses the midline, coming in on the left ends up in the right (of the medulla)

Question 11

Controleteral

Answer 11

Other side (contra)

Question 12

Receptors field of a neuron

Answer 12

Region in sensory space that changes firing rate of neuron

Question 13

Plasticity

Answer 13

Change of connectivity of mostly cortical neurons, depending on the use of the

Question 14

The function of range fractionation

Answer 14

Is to neural code both weak and intense stimuli by a single neuron

Question 15

Piezo2 is an ion channel that opens when …

Answer 15

Stretched

Question 16

What does the principle of labeled lines mean?

Answer 16

Sensory info sends action potential along separate nerve tracks.

Sensory info is (partly) coded by the connection between receptors and receiving areas in the CNS

Question 17

Neural adaptation

Answer 17

Decreases firing of neuron as the stimulation continues

Question 18

What defines the primary sensory cortex

Answer 18

First part of the brain that receives sensory input directly from the thalamus

Question 19

Neural plasticity in cortical maps

Answer 19

Are changes of mapping of sensory periphery to cortex

(If you lose your hand, the face and the arm take over those neurons bc they are close to the area of the hand in the sensory cortex in the brain)

Question 20

Some neurons have touch receptors in the skin. Where is their soma located

Answer 20

Dorsal root ganglion

Question 21

Pain and touch in your lil toe active different receptors cells (pain and touch cells). Which was had the longest axon?

Answer 21

Touch receptor cells

Question 22

Propresaption

Answer 22

Knowing where your limbs are, the fastest fibres in your body.

Question 23

Modality

Answer 23

Different types of sensation, so either vision, smell etc.

Question 24

Which 4 mechanism can open and close ion channels?

Answer 24

1) Light
2) Temperature
3) Voltages
4) Ligand gates

Question 25

Ganglions

Answer 25

Cluster of somata (nervous cells) in the peripheral nervous system.
Anatomical term

Question 26

Basal ganglia, in the brain are

Answer 26

Balls of nucleus, consisting of Brain matter

Question 27

Somatic senses are in the

Answer 27

Skin, mucles and joints

Question 28

Which sensory information does not go trough the thalamus and is an exception to the rest?

Answer 28

THE OLFACTORY CORTEX, SMELL

Question 29

Dorsal colum system is involved in

Answer 29

Touch, where info crosses at the medulla

Question 30

Anterior lateral system/spynal thalamic is involved in

Answer 30

Pain and temperature, where info crosses at the spine (before medulla)