Functional Organization of Perception

Question 1

The gray matter on either side of the spinal cord is divided into:

Answer 1

dorsal and ventral horns (posterior and anterior in humans)

Question 2

Which horn in the spinal cord is responsible for sensory input and which one for motor output?

Answer 2

Input: Dorsal
Output: Ventral

Question 3

What are the four levels of the spinal cord?

Answer 3

cervical, thoracic, lumbar, sacral

Question 4

How is white and gray matter distributed over the four levels?

Answer 4

Few axons enter at sacral level
The most axons coming from the brain terminate at higher levels
-> Sacral level has much less white matter than grey, while the cervical level has more white than grey.

Question 5

What is a central job of the Thalamus?

Answer 5

conveying information to the primary cortical motor areas.

-> It acts as a moderator, how much of which information goes to the cortex

Question 6

Is the somatic sensory cortex located posterior or anterior to the central sulcus?

Answer 6

Posterior

Question 7

The nuclei of the thalamus are classified in four main groups:

Answer 7

Anterior, Medial, Ventrolateral, Posterior