Coordinates and controls all activities of the body
Central nervous system: Including the brain, and the Spinal cord.
Peripheral nervous system: Made up of the cranial and spinal nerves.
Autonomic nervous system: Regulates action of glands and involuntary smooth muscles in the walls of tubes and hollow organs and heart
Communicate messages from one neuron to another or from a neuron to a specific target tissue.
Signaling chemicals released when a nerve impulse reaches a synapse.
Central nervous system
Brain- largest and most complex part of the nervous system. Weighs about 1400g (adult).
Cerebrum -is composed of two hemispheres the thalamus and the hypothalamus. Higherst function of the brain starts here.
Cerebral cortex- stores knowledge of impulses received and controls voluntary movement, thought association, discrimination and judgment
Frontal lobe- personality, behavior and higher intellectual functions( consciousness, learning, abstract, and creative thinking, problem solving, judgment, memory, volition, and values.
Parietal lobe- receives sensory impulses from the opposite side of the body (sight, smell, hearing, taste ) and sensory area for interpretation of pain, touch, temperature, pressure.
Temporal lobe- contains auditory center and stores sound memories.
Occipital lobe- the posterior lobe of the cerebral hemisphere is responsible for visual interpretation.
Brainstem- consist of ascending pathways, reticular formation, cranial nerves and nuclei, descending autonomic and motor pathways.
Midbrain- conducts impulses between lower and upper centers .
Pons - briges or connects many structures, midbrain and medulla oblongata, cerebellum and rest of nervous system. Center of respiration, swallowing and balance.
Cerebellum- aids in coordination of voluntary muscles and balance. Maintenance of muscles tone and posture in space( equilibrium).
Medulla oblongata - joins brain and spinal cord ( opening in the base of the skull). Contains nerve fibers ( carrying messages up to and down from brain) group together forming tracts ( bundles ) to function.
Peripheral nervous system
Cranial nerves- conducts special senses ( smell, visual, auditory). Conducts generalized sense impulses (pain, pressure, touch, vibration, deep muscle sense).