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Neuronal Cell Types
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Motor Neuron
Characteristics: Multipolar structure, long axons, efferent signals. Functions: Conduct impulses from the spinal cord to muscles or glands.
Astrocyte
Characteristics: Star-shaped glial cells, abundant in the brain and spinal cord. Functions: Support neuronal function, regulate neurotransmitter levels, help form blood-brain barrier.
Interneuron
Characteristics: Located entirely within the central nervous system, multipolar, highly variable in shape. Functions: Process information locally or convey information short distances.
Schwann Cell
Characteristics: Found in peripheral nervous system, wraps around axons. Functions: Myelinates one segment of an axon, enhances speed of neural transmission.
Bipolar Neuron
Characteristics: Two processes, one dendrite and one axon. Functions: Specialized sensory neurons for the transmission of special senses.
Oligodendrocyte
Characteristics: Located in central nervous system, branched. Functions: Myelinates multiple segments of different neurons, insulates axons.
Multipolar Neuron
Characteristics: One axon and multiple dendrites, most common type of neuron. Functions: Includes motor neurons and interneurons, integral for thought, perception, and motor coordination.
Microglia
Characteristics: Smallest glial cells, phagocytic properties. Functions: Act as the first and main form of active immune defense in the central nervous system.
Pyramidal Cell
Characteristics: Pyramidal-shaped cell body, apical dendrite, excitatory. Functions: Principal cells of the prefrontal cortex, involved in cognitive function.
Unipolar Neuron
Characteristics: Single process extends from the cell body. Functions: Mainly found in sensory systems, transmit sensory signals to the CNS.
Sensory Neuron
Characteristics: Long dendrites, unipolar or bipolar. Functions: Transmit sensory information from receptors to the central nervous system.
Purkinje Cell
Characteristics: Found in the cerebellum, elaborate dendritic arbor, inhibitory. Functions: Modulate and synchronize cerebellar activities.
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