Intro to.

Question 1

All pathways carrying somatosensation for the body enter the spinal cord in what type of fashion & where?

Answer 1

Segmental Fashion over the dorsal root of each spinal nerve

Question 2

Pathways of somatosensation can be viewed as how many neuron pathways?

Answer 2

Three

Question 3

It takes # neurons to cary somatosensation from ______ receptors to the brainfor perception of that somatosensory modality.

Answer 3

3 neurons from the peripheral receptors

Question 4

How is segmental arrangement maintained wihtin the pathways?

Answer 4

Topographic map

(Somatotopic organization)

Question 5

Where can you see Somatotopic Organization in the brain?

Answer 5

Homunculus, positioned over both primary somatosensory cortex and primary motor cortex

Question 6

What modalities of consciousness/sensation are carried via the dosal column/medial lemniscus system? (4)

Answer 6

1. ) Conscious Proprioception
2. ) Discriminative touch
3. ) Position Sense (proprioception)
4. ) Vibratory sensations

Question 7

What nerve carries modalities of consciousness for the face?

Answer 7

Trigeminal Nerve

Question 8

Define Kinesthesia

Answer 8

The sense of movement and limb position

Question 9

Consicous perception is involved with?

Answer 9

Kinesthesia

Question 10

The sensations of proprioception and discriminative touch are necessary for what?

Answer 10

Stereognosis

Question 11

What is Stereognosis?

Answer 11

The ability to identify an object by feel

Question 12

Disregarding interneurons, transfer of sensation to the cortex is organized in a _______ chain.

Answer 12

Three-Neuron Chain