John Donovan4/9/12

Nervous System• The nervous system function is to send

electronic signals to different parts of the body to signal them to do a task, such as me typing on the keys write now.

CNS

• The central nervous system consists of the major organs: the brain and the spinal cord.

• These two organs are the CNS and facilitate the electrical signals that go everywhere.

PNS

• The peripheral nervous system connects the central nervous system to sensory organs such as the eyes, hears, and other organs of the body, muscles, blood vessels and glands.

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• This works by the synapsis in the spinal cord. • This characteristic allows reflex actions to occur relatively

quickly by activating spinal motor neurons without the delay of routing signals through the brain.

Nerve Impulse

• Ions cause an electrical impulse. Neurons and muscle cells are electrically excitable cells, which means that they can transmit electrical nerve impulses.

• These impulses are due to events in the cell membrane.

Neurotransmitters

• Neurotransmitters are the chemicals which allow the transmission of signals from one neuron to the next across synapses.

• They are also found at the axon endings of motor neurons, where they stimulate the muscle fibers.

Influences (EPSP/IPSP)• IPSP and Hyperpolarization: IPSP inhibits

neurotransmitter systems cause postsynaptic membranes to hyperpolarize.

• EPSP and Depolarization: EPSP is the potential that a firing impulse will cross the synapse and releasing a signal.

Parkinson's Disease• Parkinson's disease is

a group of conditions of motor system disorders that are the result of the loss of dopamine-producing brain cells.

• This disorder makes you shake, or tremor, or cause stiffness in our limbs.

Multiple Sclerosis• Multiple sclerosis is a

potentially debilitating disease in which your body's immune system eats away at the protective sheath that covers your nerves.

• This interferes with the communication between your brain and the rest of your body.

• In the long run, this may result in deterioration of the and this is not reversible.

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