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8 Cards in this Set

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The specific neural pathway that transmit info pertaining to a particular modality, and each sensory modality follows its own pathway.
sensory areas of the cerebral cortex
Somatosensory cortex
Gustatory cortex
Visual cortex
Auditory cortex
Olfactory cortex
sensory unit
a single afferent neuron and all the receptors associated w/it.

all the same type

activation of associated receptors trigger action potentials in the afferent neuron.
receptive field
Area over which an adequate stimulus can produce a response (excitatory or inhibitory) in the afferent neuron of that neuron.

It then corresponds to the region containing receptors for that afferent neuron.
first-order neurons
The afferent neuron that transmits info from the periphery to the CNS

may diverge w/in the CNS and communicatew/several interneurons

may distribute converging input to interneurons
second-order neurons
Interneurons transmit the info to the thalamus, the major relay nucleus for sensory input
third-order neurons
In the thalamus, these second-order neurons form synapses w/ _______ ______ _______ that transmit info to the cerebral cortex, where sensory perception occurs.
3-4 neurons long
How long is a generalized neural pathway in the body?