Nervous System Overview

Function of the Nervous System Gathers, processes, and responds to information Receives information through the five senses The basic functioning units are called neurons

Divided into Two Parts: Central (CNS) Peripheral (PNS) http://www.morphonix.com

Central Nervous System Brain Spinal cord

Brain Cerebrum Cerebellum Brain stem

Cerebrum Cerebral Cortex Coordinates Thinking and learning Creativity Five senses Memory and emotion Problem-solving Decisions Language http://www.morphonix.com

Hippocampus Stores and processes memories Helps find memories   Helps find memories Affects emotions http://www.morphonix.com

Cerebellum Coordinates Most muscles Movement Learned skills http://www.morphonix.com

Cerebellum Receives messages from most of the muscles in your body Communicates with the other parts of the brain Sends messages about movement and balance back to your body http://www.morphonix.com

Brain Stem Coordinates Heartbeat Breathing Digestion Swallowing Blinking http://www.morphonix.com

Spinal Cord Bundle of nerves that carries messages between the brain and the rest of the body. Long tube of nerve tissue running from the brain down the length of the back inside of the spine

http://www.merck.com

http://www.paraquad.asn.au/

The Peripheral Nervous System Has sensory neurons and motor neurons that transmit information between the CNS and the rest of the body.

Two parts of the PNS Somatic NS Autonomic NS Sensory nerves Motor nerves Messages between brain and body CONTROLS VOLUNTARY MUSCLES Autonomic NS Controls organs and some muscles CONTROLS INVOLUNTARY MUSCLES

Neurons Nerve Cells Parts Carry messages Soma Dendrites Axon Called impulses http://www.morphonix.com

Synapse Small space across which an impulse moves from an axon to the dendrites or cell body of another neuron

Stimulus-Response Stimulus (stimuli) Anything that the body can react or respond to May be internal or external Response – the reaction to stimuli

http://www.bbc.co.uk

Impulses are picked up by DENDRITES and travel down the AXON. http://www.infovisual.info Impulses are picked up by DENDRITES and travel down the AXON.

Stimuli comes into the brain through the five senses Stimuli comes into the brain through the five senses. The nerves that bring stimuli into the body are SENSORY neurons. The impulse travels through INTERNEURONS. When the impulse reaches the MOTOR neuron, the response occurs. home.earthlink.net/~dayvdanls/IHP2.html