GSA: General Sensory Afferents - Systems of the Spinal Cord and Trigeminal System

Question 1

Ways that the nervous system receives input about the external environment is called?

Answer 1

Exteroception (GSA)

Question 2

Ways that the nervous system receives input about the internal environment is called?

Answer 2

Interoception (GVA)

Question 3

Ways that the nervous system receives input about the position and movement of the body in space is called?

Answer 3

Proprioception

Question 4

GVA stands for?

Answer 4

General Visceral Afferents

Question 5

GSA stands for?

Answer 5

General Sensory Afferents

Question 6

What are the two general sensory systems?

Answer 6

GVA and GSA

Question 7

GVA is sensory from the __________ nervous system.

Answer 7

Autonomic

Question 8

GSA is sensory from what?

Answer 8

Skin and Skeletal muscles

Question 9

What does the GSA sense?

Answer 9

Touch
Pain
Temp
Position of body

Question 10

What are the 5 types of sensory receptors?

Answer 10

Mechanoreceptors
Thermoreceptors
Nociceptor
Photoreceptors
Chemoreceptors

Question 11

What stimulus do Mechanoreceptors best respond to?

Answer 11

Physical deformation

Question 12

What stimulus do Thermoreceptors best respond to?

Answer 12

Heat and Cold

Question 13

What stimulus do Nociceptors best respond to?

Answer 13

Noxious stimuli

Question 14

What stimulus do Photoreceptors best respond to?

Answer 14

Vision

Question 15

What stimulus do Chemoreceptors best respond to?

Answer 15

Chemical changes like taste, smell, O2 and CO2 in blood

Question 16

What are the 4 afferent neuron destinations?

Answer 16

Cortex
Cerebellum
Individual Spinal Cord Segments
ARAS

Question 17

What is divergence of afferent information?

Answer 17

The same sensory information is sent

to multiple destinations for different purposes

Question 18

What is parallel processing of afferent information?

Answer 18

Different aspects of the same
sensory experience are perceived in different parts
of the brain at the same time.

Question 19

Divergence happens so that _____ ______ can occur.

Answer 19

parallel processing

Question 20

An action potential in a primary neuron goes from where to where?

Answer 20

From periphery to CNS

Question 21

In what structure do axons ascend to the brain?

Answer 21

In fiber tracts

Question 22

How are somatosensory fiber tracts named?

Answer 22

Prefix: Named for the origin of the tract
Suffix: Named for the termination of the tract

“spinothalamic” or “ “vestibulospinal”

Question 23

Where would you find peripheral receptors?

Answer 23

On primary afferent neurons

Question 24

Where does relay and processing of all sensory information destined for CONSCIOUS perception occur?

Answer 24

From thalamus to cortex

Question 25

Where do somatosensory inputs go to?

Answer 25

CONTRALATERAL thalamus and cortex

Question 26

Primary afferents are also known as ________ neurons and converge on ______ order neuron.

Answer 26

excitatory; 2nd order neuron

Question 27

What surrounds the receptive field of excitatory neurons? What does this help determine?

Answer 27

Inhibitory neurons

Helps determine where the stimulus is (excitatory) and isn’t (inhibitory)

Question 28

What is somatotopy?

Answer 28

the point-for-point correspondence of an area of the body to a specific point on the central nervous system.
The areas which are finely controlled (e.g., the digits) have larger portions of the somatosensory cortex