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Central Nervous System

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The Central Nervous System

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Terms in this set (57)

The Central Nervous System

• Central nervous system - the brain and spinal cord
• Directional terms unique to the CNS
- Rostral - toward the nose
- Caudal - toward the tail

Basic Parts and Organization of the Brain

• Divided into four regions
-Cerebrum: conscious thought (where decision making takes place) biggest part
• Diencephalon: (hypothalamus, epothalamus, and thalamus)
• Brain stem: midbrain, pons, and medulla
• Cerebellum: "little brain"

Ventricles of the Brain

Expansions of the brain's central cavity:
• Filled with cerebrospinal fluid
• Lined with ependymal cells (our support cells)
• Continuous with each other
• Continuous with the central canal of the spinal cord

Ventricles of the Brain

• Lateral ventricles - located in cerebral hemispheres
• Horseshoe-shaped from bending of the cerebral hemispheres
• Third ventricle - lies in diencephalon
• Connected with lateral ventricles by interventricular foramen

Ventricles of the Brain

• Cerebral aqueduct - connects 3rd and 4th ventricles
• Fourth ventricle - lies in hindbrain
• Connects to the central canal of the spinal cord