Ch. 13: Brain and Cranial Nerves

Table 13.1: Divisions and Functions of the Brain

Brain (#s)

100 billion neurons + 1 trillion neurological cells = Each neuron averages 10,000 connections with other neurons

4 parts of brain and their functions

1. Brainstem: attaches the spinal cord to the brain & responsible for integration of survival reflexes.
2. Cerebellum: control of locomotion, balance, posture.
3. Diencephalon: thalamus, subthalamus, epithalamus, hypothalamus.
4. Cerebrum: conscious thought & control.

How many cranial nerves come from the cerebrum?

2 pairs

How many cranial nerves come from the brainstem?

10 pairs

How many pairs of cranial nerves are in the brain?
A. 10
B. 11
C. 12
D. 14

C. 12

Development of the CNS

Development of the Ventricles

Describe the development of the neural tube and name the embryonic pouches and the adult brain structures that they become.

Explain the origin of the ventricles of the brain.

Brainstem and Diencephalon

Know: Diencephalon (Thalamus), Brainstem (Midbrain, Pons, Medulla oblongata)

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