Primary Sensory Coding Flashcards
Receptive Field
The area of the body that leads to activity in a particular neuron
Sensory Unit
a single afferent neuron with all its receptor endings
Coding
the conversion of stimulus energy into a signal or pattern of action potentials, that conveys the relevant sensory info to the CNA
Adequate stimulus
type of stimulus design the receptor responds the most often to
Acuity
the precision of localizing a stimulus
What makes acuity more accurate
more density of sensory neurons
Labelled Lines
describes the existence of dedicated specific ascending pathways that carry informatio about a speciic modality from a specific location to the CNS
4 properties of Ascending Pathways
usually a 3 neuron chain
usually conveys infor about one stimulus modality
passes through the brainstem, thalamus, and final neurons goes to specific region of cerebral cortex
cross sides so it is opposite to the sensory receptor
Pathways from somatic sensory project to what cortex and association area
-somatosensory cotex and partiel lobe AA
Pathways from eyes project to what cortex and AA
Visual cortex and occiptal lobe AA
Pathways from ears project to what cortex and AA
auditory cortex and temporal lobe AA
Pathways from taste buds project to what cortex and AA
gustatory cortex and pariteal lobe AA
Pathways from the nose project to what cortex and AA
olfacotry cortex and limbic system
Cortex=sensation, what does that mean?
sensory information reaches cortex via labeled line
Association Area=perception, what dos that mean?
awareness and meaning at AA
