THE BRAIN, BODY, AND NERVES

NERVOUS SYSTEM

• Central Nervous system• (brain and spinal cord)

• Peripheral Nervous System• (Everything else)

• PNS branches out from CNS, bring information back and forth

• Somatic vs Autonomic• Voluntary vs automatic• Examples?

NEURONS

• Information arrives at the dendrites • Travels down the

axon and sent out through the axon terminals to the next neuron’s dendrites• Interlaced fingers

• Myelin sheath is wrapped around the axon to protect it

NEURONS PASSING INFORMATION

• Gap between neurons is the synapse• Information moves

across the gap in chemical form• Norepinephrine-memory• Acetylcholine-movement• Dopamine-learning• Serotonin-mood

Da Brain….or Three

• Hindbrain-basics of life• Cerebellum-posture,

balance, voluntary stuff• Medulla- breathing,

heart rate, and reflexes• Midbrain-smallest

part• Takes sensory

information and passes it along

• Forebrain-Higher thinking activities

You’re going to lobe this…. (4)

• Frontal- planning movement, fine motor control, short-term memory• Temporal- hearing,

advanced visual planning• Parietal- body

sensations• Occipital- vision

LEFT AND RIGHT

• Who is left brained?• Math• Logic• Speech ability• Right side of the

body

• Who is right brained?• Visual and Spatial

relationships• Recognizing patterns• Music• Art

• Creativity• Intuition• Left side of the body

LOOK AT ALL THE BRAINS

• CAT scan• Computerized Axial

Tomography• Brain x-ray

• PET scan• Positron Emission

Tomography• Inject a radioactive

solution to see which parts of the brain are in use

• MRI scan• Magnetic Resonance

Imaging• Identifies structure• Shows tumors and

other brain damage