PNB 2264 Lecture Notes - Lecture 13: Sensory Neuron, Stereognosis, Neural Pathway
17 Dec 2018
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Document Summary
Sensory system - a division of the nervous system that consists of sensory receptors, the neural pathway that conducts information, and the parts of the brain that processes the information. Organized to receive, process (possibly modify) and relay stimulus information. Sensation - when you first sense something, primary cortices do the sensing. Perception - making sense of the sensory stimuli, giving meaning to sensation information. Stereognosis - identifiable objects were common objects. Use sensory receptors, efferent pathways, association cortex to make conclusions. Transduce - convert stimulus energy into something the nervous system can understand, aka changes in membrane potential. Receptor potential (aka graded potential) is converted to an action potential to bring information upstairs to the spinal cord or brain stem to the thalamus, primary sensory cortex, etc. Adequate stimulus - a stimulus that requires the least amount of energy to activate a receptor, preferred/best/favorite stimulus of the receptor, stimuli matches with the receptor.
