1. “How does such a tiny brain affect Homer?”

3. Central Nervous System (CNS)

4. Peripheral Nervous System (PNC)
Contains the nerves that connect all the parts of your body to the central nervous system

5. Cranial Nerves: PNC that stems from the brain…
Spinal Nerves: PNC that stems from the Spinal Cord
Cranial Nerves: PNC that stems from the brain…

6. Spinal Nerve Reflexes
Spinal Nerves are made up of both a dorsal and ventral root.
The dorsal roots carry signals into the central nervous system from sensory receptors.
Ventral roots carry information from the central nervous system to muscles and glands.

7. Somatic nervous system voluntary responses

8. Autonomic = involuntary response 2 kinds of autonomic nerves:

9. Neuron Structure Nerve cells = Neurons
Dendrites: receive information from another cell and transmit the message to the cell body
Cell body: contains the nucleus, mitochondria and other organelles
Axon: conducts messages away from the body

10. **Bundles of these neurons make up a nerve
Speeds up the nerve impulse
Meets a cell at a synapse
Surrounds and nourishes the axon of the neuron
**Bundles of these neurons make up a nerve

11. Basic Neuron Types
Sensory Neuron: sends sensory info to the spinal cord/brain -
Interneuron: Relays info from sensory to motor neuron
Motor Neuron: You tell me!!

12. Take picture with a camera phone, print out and label
Play-Doh Nerves!
Take picture with a camera phone, print out and label

13. Structure of the Human Brain

14. The cerebrum is made of two cerebral hemispheres, each with 4 lobes:
The cerebrum is the upper part of the brain that receives sensation and controls movement.
The cerebrum is made of two
cerebral hemispheres, each with 4 lobes:

15. Cerebral Cortex
The folded outer layer is called the cerebral cortex and is made up of gray matter.
Its many folds allow the brain to have a large surface area and still fit into the skull.

16. Cerebellum

17. Brain Stem

18. Hypothalamus Important autonomic nervous system center
Helps regulate body temperature
Controls water balance
Regulates metabolism
The pituitary gland
is attached to and
regulated by the
hypothalamus