Functional Classification of Neurons

Created by nkennon 

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Sensory neurons

carry impulses to the center; detect changes inside and outside the body; begin in any organ and end in CNS

Interneurons

lie in CNS; process, store, and recieve informationl receive impulses from sensory receptors and madke decisions in repsonse

Motor neurons

carry messages away from CNS; employ peripheral neurons to carry message form brain to the effector

Sensory, inter, motor

Functional classification of neurons

Central, Peripheral, Somatic, Autonomic

Divisions of the Nervous system

Central Nervous System

spinal cord, brain

Peripheral Nervous System

cranial nerves arise from the brain; spinal nerves arise from the spinal cord

Somatic Nervous System

connects to skin and skeletal muscles' conscious activities (voluntary)

Autonomic Nervous System

connects CNS to viscera; acts on all effectors other than skeleton; unconscious activities sympathetic (emergency), parasymphatic

Central Canal, Dorsal Root, Dorsal Root Ganglion, Gray matter, White Matter, Ventral Root

Parts of the Spinal cord

Central Canal

contains cerebrospinal fluid

Dorsal Root and Dorsal Root Ganglion

contains cell bodies of sensory neurons; sensory dendrites carry information to cell body and axon takes it into the spinal cord

Gray Matter

majority of this area is interneurons and some motor neurons (lacks myelin)

White Matter

highway; glistering white appearance due to myelin; bundles of myelinated axons form nerve tracts up and down the spinal cord; bundles arranged in 3 columns- anterior, posterior, lateral funiculi

Ventral Root

contains axons of motor neurons whose cell bodies are in the gray matter

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