PSYC 2P36 Lecture Notes - Lecture 11: Ion Exchange, Multipolar Neuron, Vestibular System
21 Dec 2015
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Document Summary
Bottom up processing: sensory input systems (allow us to sense a stimulus) to cortical systems that allow understanding (to become aware of the stimulus) Top down processing: from the cortex (complex information) to the outside world. As humans we rely heavily on this system. Use it for coordination to get from one place to another. Somatosensation: touch, temperature, pain, stretch (vagal), proprioception (kinesthetic) Extra sensory perception: perception of non-conscious experiences. For a stimulus to be translated into a perception, we need: Absorption of activation by physical energy through specialized receptor cells (typically unipolar) Physical activation can come in many forms. Conversion of physical energy to an electrochemical pattern in. Activation will ultimately cause a receptor potential to occur. There will be an ionic exchange of molecules across the neural membrane such that a change in polarization will occur. Refers to the one-to-one correspondence between some aspect of physical stimulus and some aspect of the nervous system activity in the cortex.
