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15 Cards in this Set

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Transmit nerve impulses from receptors in the skin, sense organs, muscles, joints and viscera toward the brain and spinal cord.
Sensory (Afferent) Neurons
Neuron
Convey nerve impulses from the brain and spinal cord to effectors which may be either muscles or glands
Motor (efferent) Neurons
Neuron
All other neurons that are not specifically sensory or motor neurons. Most neurons in the body, perhaps 90% are this type of neuron
Interneurons (association neurons)
Neuron
Classification of Neurons- neurons are classified according to the number of processes extending from the cell body
Structural Classification
structural or functional
Classification of Neurons- neurons are classified according to the direction in which they transmit nerve impulses
Functional Classification
structural or functional
Name structurally classified neurons
Multipolar
Bipolar
Interneurons
3 types
Name functionally classified neurons
Sensory (afferent) Neurons
Motor (efferent) Neurons
Interneurons Neurons
3 types
Have one main dendrite and one axon. They are found in the retina of the eye, in the inner ear and in the olfactory area of the brain
Bipolar Neurons
structural
Are sensory neurons that originate in the embryo as bipolar neurons. During development the axon and dendrite fuse into a single process that divides into two branches a short distance from cell body; both branches have a characteristic structure and function of an axon.
Unipolar Neurons
the dendrites monitor a sensory stimulus such as touch or stretching
This is brain matter- it is aggregations of myelinated processes from many neurons
White matter
white or grey
This is brain matter- contains neuronal cell bodies, dendrites unmyelinated axons, axon terminals and neuroglia. Covers the surface of the largest portion of the brain
Gray matter
white or grey
Where do you find Purkinje cells?
in the cerebellum
brain
Where do you find Renshaw cells?
in the Spinal Cord
not brain
Where do you find Pyrimidal cells?
in the brain
all of one area
In unipolar neurons, the trigger zone for nerve impulses is at junction of ______ and ______.
dendrites and axon
non