Physiology IV: Somatosensory System 2 - Primary Sensory Neurons and their Modalities

Question 1 of 11

1

Sensory Pathways:
❌ Discriminatory touch, pressure, vibration, proprioception
❌ Pain, Thermosensation, itch, tickle

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Dorsal Column/Medial Lemniscus System

Spinothalmic Tract

Tectospinal Tract

Corticospinal Tract

Explanation

Question 2 of 11

1

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Third order neurons of the sensory pathways tend to originate in the ( Thalamus, Hypothalamus, Putamen, Caudate Nucleus ) and project to the ( Primary Somatosensory Cortex, Primary Motor Cortex ) (AKA the ( Postcentral, Precentral ) Gyrus)

Explanation

Question 3 of 11

1

Label the parts of the sensory and motor pathways shown below.

Drag an answer into the correct orange point.

Dorsal Column

Spinothalamic Tract

Ventral Corticospinal Tract

Lateral Corticospinal Tract

Lateral Vestibulospinal Tract

Medullary Reticulospinal Tract

Explanation

Question 4 of 11

1

The Dorsal Column is split into 2 parts, the fasciculus gracilis and fasciculus cuneatus. Which is which and what do they innervate?

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Fasciculus Gracilis

Fasciculus Cuneatus

Sensory Input Legs/Lower Trunk

Sensory Input Arms/Upper Trunk

Explanation

Question 5 of 11

1

The vertebral level where sensory information stops travelling via the fasciculus cuneatus and starts travelling in the fasciculus gracilis is ...

Select one of the following:

T6
C4
L1
S2

Explanation

Question 6 of 11

1

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In terms of the dorsal column medial lemniscus pathway, ( 2nd, 1st, 3rd ) order neurons cross collectively at the great sensory decussation and ascend in the ( medial lemniscus, lateral lemniscus, inferior colliculus ) to the ( Ventral Posterior Lateral (VPL), Ventral Superior Medial (VSM), Geniculate ) nucleus of the thalamus

Explanation

Question 7 of 11

1

The Dorsal Column Medial Lemniscus pathway allows for Stereognosis. What is this?

Select one of the following:

The ability to recognise sounds by the vibrations they cause
The ability to recognise an object by feeling it
The ability to identify the magnitude of certain vibrations

Explanation

Question 8 of 11

1

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( Lateral Inhibition, Adjacent Inhibition, Lateral Depression, Adjacent Depression ) is the way in which an active neuron inhibits the activity of its neighbours via inhibitory interneurons

Explanation

Question 9 of 11

1

The somatosensory cortex has how many cell layers?

Select one of the following:

3
5
6
8

Explanation

Question 10 of 11

1

Fill the blank space to complete the text.

As information is conveyed from one neuron to the next in a sensory pathway, differences in the activity of adjacent neurones are amplified. This phenomenon is called

Explanation

Question 11 of 11

1

Fill the blank space to complete the text.

Lateral inhibition allows a more focussed idea of where a sensation has occurred in the body and is facilitated by a certain type of neuron. These neurons are called

	Created by Matthew Coulson over 5 years ago

Somatosensory System 2 - Primary Sensory Neurons and their Modalities given on 4/9/2018

Physiology IV: Somatosensory System 2 - Primary Sensory Neurons and their Modalities

Question 1 of 11

Sensory Pathways: ❌ Discriminatory touch, pressure, vibration, proprioception ❌ Pain, Thermosensation, itch, tickle

Drag and drop to complete the text.

Explanation

Question 2 of 11

Select from the dropdown lists to complete the text.

Explanation

Question 3 of 11

Label the parts of the sensory and motor pathways shown below.

Drag an answer into the correct orange point.

Explanation

Question 4 of 11

The Dorsal Column is split into 2 parts, the fasciculus gracilis and fasciculus cuneatus. Which is which and what do they innervate?

Drag an answer into the correct orange point.

Explanation

Question 5 of 11

The vertebral level where sensory information stops travelling via the fasciculus cuneatus and starts travelling in the fasciculus gracilis is ...

Select one of the following:

Explanation

Question 6 of 11

Select from the dropdown lists to complete the text.

Explanation

Question 7 of 11

The Dorsal Column Medial Lemniscus pathway allows for Stereognosis. What is this?

Select one of the following:

Explanation

Question 8 of 11

Select from the dropdown list to complete the text.

Lateral Inhibition Adjacent Inhibition Lateral Depression Adjacent Depression( Lateral Inhibition, Adjacent Inhibition, Lateral Depression, Adjacent Depression ) is the way in which an active neuron inhibits the activity of its neighbours via inhibitory interneurons

Explanation

Question 9 of 11

The somatosensory cortex has how many cell layers?

Select one of the following:

Explanation

Question 10 of 11

Fill the blank space to complete the text.

As information is conveyed from one neuron to the next in a sensory pathway, differences in the activity of adjacent neurones are amplified. This phenomenon is called

Explanation

Question 11 of 11

Fill the blank space to complete the text.

Lateral inhibition allows a more focussed idea of where a sensation has occurred in the body and is facilitated by a certain type of neuron. These neurons are called

Explanation

Sensory Pathways:
❌ Discriminatory touch, pressure, vibration, proprioception
❌ Pain, Thermosensation, itch, tickle

( Lateral Inhibition, Adjacent Inhibition, Lateral Depression, Adjacent Depression ) is the way in which an active neuron inhibits the activity of its neighbours via inhibitory interneurons