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Components of the Nervous System (Central Nervous System (Brain (Contains…
Components of the Nervous System
Central Nervous System
Brain
Integration
Receives and puts information together.
Contains White Matter and Grey Matter.
White Matter
Serves as tracts for signals. Axons are myelinated
Grey Matter
Integration takes place here
Spinal Cord
Nuclei
Clusters of Neuron cell bodies within the CNS
Peripheral Nervous System
Somatic Division
Sensory and motor information from the outer limbs.
Proprioceptors
Stretch and movement of muscles, tendons, and joints. Keeps track of body in space,
Somatic Sensory fibers
Sensations in the skin, touch, pain, pressure, vibration, and proprioception.
Somatic Motor fibers
Motor innervation to skeletal muscles of the limbs.
Structures outside of the brain and spinal cord
Cranial Nerves
Individual nerves that control different senses and parts.
Spinal Nerves
Visceral Division
Sensory and motor information from the Body Wall.
Visceral Sensory fibers
Stretch, pain, temperature, chemical changes in the viscera.
Visceral Motor fibers
Motor innervation of the Smooth muscles, Cardiac muscle, and glands. Involuntary
Cardiac Muscle
Smooth Muscle
Glands
Endocrine Glands
Hormones released within the body, stays inside the body.
Exocrine Glands
Chemicals released within the body, goes to the outer surface.
Regulates chemical release within the body
Neuroglia (Glial Cells)
Non-excitable. supporting cells of the Nervous system.
Neuroglia of the PNS
Satellite Cells
Covers the ganglia of the PNS
Ganglia
Clusters of Neuron Cell bodies outside of the CNS.
Clusters of Neuron cell bodies
Schwann Cells
Myelination
Creates the myelin sheath for the axons of the PNS
Neuroglia of the CNS
Astrocytes
Maintains chemical balance
Microglia
Phagocytes of the CNS
Oligodendrocytes
Creates the myelin sheath for axons in the CNS
Ependymal Cells
Produces and circulates CSF
Autonomic Nervous System
Visceral Motor = Autonomic Nervous System
Sensory Receptors
Brings sensory information to the CNS.