Nervous System

The nervous system works based on electrical signals that stimulate the activities in muscles and glands.

The BrainThe brain is protected by the skull and is divided into:

The Brain

Spinal CordWorks as a cable that transmits signals and it goes from the base of the brain to the base of the back. It is protected by the vertebral column.

Reflex ArcThe reflex arc is the simplest behavior of the nervous system.

Central Nervous SystemIs formed by the brain and spinal cord, it receives and process sensory information, elaborates thoughts and orders responses.

Peripheral Nervous SystemIs composed of neurons located outside the CNS, it connects the CNS to the body.

Neurons

The neuron is the function unit of the nervous system. It is a specialized cell that carries out four functions.

•Receive information.•Produce electrical signals.•Transmit the signal.•Communicate with other cells.

Neurons

Synapse is a very specialized union among neurons, that transmits nerves impulse between neurons.

The cell body integrate electrical signals to produce a big one called action potential.

Dendrites respond to stimuli from other neurons or from the external environment, through neurotransmitters.

Neurotransmitters

Reward

Bonding

Happiness

Euphoria

Nervous System Alterations

Psychosomatic diseaseEpilepsy

Parkinson

AlzheimerMultiple Sclerosis