1. The BRAIN and SPINAL CORD
Nervous System
The BRAIN and SPINAL CORD

2. Remember!
The Central Nervous System (CNS) consists of which two major structures??
BRAIN
SPINAL CORD

3. Spinal cord
Begins at base of skull and continues down to 2nd lumbar vertebra
White and soft
Found within vertebral column
Surrounded by cerebrospinal fluid

4. Functions of Spinal Cord
Reflex Center
Conduction pathway to and from the brain

5. Brain 3lb mass of soft, nervous tissue Contains 100 billion neurons
Covered by tissue layers known as MENINGES
Protected by layer of cerebrospinal fluid
The folds in the brain are known as a GYRUS

6. 4 Major Parts of brain
Diencephalon
Cerebrum
Cerebellum
Brain Stem

7. DIencephalon Composed of Thalamus and Hypothalamus Controls: Appetites
Emotions
Sleep

8. Cerebrum Largest part of brain Divided into RIGHT and LEFT hemispheres
Responsible for:
Conscious thought and reasoning
Memory
Will power

9. cerebellum 2 Hemispheres Lower back part of brain Controls: Balance
Coordination of muscle movements

10. Brain stem Composed of PONS, MEDULLA OBLONGATA, and MIDBRAIN
Pons – controls breathing
Medulla oblongata – Heart rate and Blood Pressure
Midbrain – Vision and hearing