W19-L1: General Structure of the CNS

Question 1

3 roles of thalamic nuclei

Answer 1

1. Relays sensory information to specific areas of cortex
2. Relays of non-sensory information from cortex and basal ganglia to specific areas of cortex
3. Project globally to cortex; arousal, sleep

Question 2

Function of brainstem

Answer 2

Controls:
• Facial muscles
• Sensation from face and head
 • Cardiorespiratory control
• Arousal, sleep/wake cycle

Question 3

Dorsal roots axon type

Answer 3

sensory axons

Question 4

Ventral root axon type

Answer 4

ventral horn motor axons (control skeletal muscle of body)

Question 5

What is the structure of the Dorsal root ganglia neurons

Answer 5

Branching axon
• One branch in peripheral nerve – detects stimulus
• One branch enters dorsal horn via dorsal root

Question 6

What does the BBB lack?

Answer 6

pinocytotic transfer, have very tight tight

junctions