Week 4 - Sensory pathways and somatic nervous system

Question 1

Define sensory pathway?

Answer 1

Series of neurons that relays sensory information from receptors to CNS

Question 2

Define sensory receptor?

Answer 2

Specialised cells that monitor specific conditions

Question 3

Afferent division pathways?

Answer 3

Somatic and visceral

Question 4

Efferent division pathway?

Answer 4

Somatic motor portion

Question 5

5 general senses?

Answer 5

temp, pain, touch, pressure, vibration

Question 6

5 special senses?

Answer 6

Smell, taste, sight, balance, hearing

Question 7

Define transduction

Answer 7

Conversion of an arriving stimulus into an action potential by a sensory receptor

Question 8

Define adaptation?

Answer 8

Reduction of receptor sensitivity in the presence of a constant stimulus

Question 9

3 types of sensory receptors?

Answer 9

Exteroceptors
Proprioceptors
Interceptors

Question 10

Define First - order neuron

Answer 10

Sensory neuron that delivers sensations to the CNS

Question 11

Define second - order neuron

Answer 11

Interneuron in spinal cord or brainstem that receives info from first - order neuron

Question 12

Define third - order neuron

Answer 12

Neuron in thalamus that must receive info from second - order neuron

Question 13

3 somatic sensory pathways?

Answer 13

Spinothalamic
Posterior column
Spinocerebellar

Question 14

Define spinothalamic pathway

Answer 14

Carries sensation of crude touch, pressure, pain and temp

Question 15

Define posterior column pathway

Answer 15

Carries sensations of fine touch, vibration, pressure

Question 16

Define spinocerebellar pathway?

Answer 16

Conveys info about positions of muscles, tendons and joints from spinal cord to cerebellum

Question 17

What is the function of the somatic nervous system

Answer 17

Controls contractions of skeletal muscles

Question 18

3 somatic motor pathways?

Answer 18

Corticospinal
Medial
Lateral

Question 19

Define upper motor neuron

Answer 19

Cell body lies in a CNS processing center

Question 20

Define lower motor neuron

Answer 20

Cell body lies in a nucleus of brainstem or spinal cord

Question 21

Autonomic nervous system function?

Answer 21

Involuntary control of visceral effectors

Question 22

Two divisions of the Autonomic nervous system

Answer 22

Sympathetic

Parasympathetic

Question 23

Sympathetic division function

Answer 23

Prepares body for emergencies

Question 24

Parasympathetic division function

Answer 24

Conserves energy and maintains resting metabolic rate

Question 25

Medial somatic motor pathway function

Answer 25

Controls muscle to and gross movements of neck, trunk, and proximal limb muscles

Question 26

Lateral somatic motor pathway function

Answer 26

Controls muscle to and precise movements of distal parts of limbs

Question 27

Corticospinal somatic motor neuron pathway function?

Answer 27

Provides voluntary control over skeletal muscles

Question 28

Exterorecptors function?

Answer 28

Provide info about external environment

Question 29

Proprioceptors function?

Answer 29

Report positions of skeletal muscles and joints

Question 30

Interceptors function

Answer 30

Monitor visceral organs and functions