Central Nervous System

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Submitted By alyonakhan
Words 3831
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PCB 3702
Chapter 8

The Central Nervous
System

Learning Objectives
1. Describe the embryonic origin of the CNS
2. Identify the 5 brain regions & the major structures they contain, including the ventricles
3. Describe the organization of the sensory & motor areas of the cerebral cortex, & the nature of the basal ganglia
4. Distinguish between the functions of the right & left cerebral hemispheres, and describe the significance of the limbic system
5. Identify the areas of cerebral cortex involved in speech & language 6. Describe the brain regions involved in memory and events associated with learning & language

Learning Objectives
7. Describe the locations & functions of the thalamus & hypothalamus 8. Identify the structures & functions of the midbrain & hindbrain 9. Describe the structure & function of the RAS
10. Describe the sensory & motor pathways
11. Describe the structure & function of the pyramidal & extrapyramidal motor tracts
12. Identify the structures of a spinal nerve and describe the neural pathways of a reflex arc.

I. Structural Organization of the Brain

A.

Central Nervous System

1. Composed of the brain and spinal cord
a. Receives input from sensory neurons and directs activity of motor neurons that innervate muscles and glands
b. Association neurons integrate sensory information and help direct the appropriate response to maintain homeostasis and respond to the environment.

Central Nervous System
Gyrus

Sulcus

Corpus callosum Cerebrum

Meninges

Spinal cord
Central canal

Tentorium cerebelli Cerebellum

B.

Embryonic Development

1. From the ectoderm comes a groove that will become the neural tube around 20 days after conception.
This will eventually become the CNS.
2. Between the neural tube and the developing epidermis, a neural crest forms. This will…...

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