introsens_r2

introsens_r2 - General Properties of Sensory Systems...

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General Properties of Sensory Systems Lectures OUTLINE VII. Sensory Systems: General Introduction VII.A. Basic Concepts VII.A.1 Example of an illusion VII.A.2 Different types of sensory systems VII.A.3. Sensory transduction and receptor potentials VII.A.4. Categories of sensory information VII.A.4.a Sensory modality VII.A.4.b Intensity VII.A.4.c. Duration VII.A.5. The concept of the Receptive Field (RF) VII.A.6 The concept of a map VII.A.6.a.What are maps VII.A.6.b. how do we get maps from RFs (IMPORTANT the two are DIFFERENT) VII.A.6.c. Important stimuli are over-represented in maps VII.B. The brain determines perception (rather than the physical world) VII.B.1. Explaining the flag illusion VII.B.2 Selective adaptation and illusions (also do spiral illusion) VII.B.3. Scene Analysis VII.B.3.a. Background – The spectrograph and sound VII.B.3.a.(i) pure tones VII.B.3.a.(ii) complex tones VII.B.3.a.(iii) frequency modulation (FM) VII.B.3.b. The perceptual power of common modulation VII.B.3.b.(i) fusion based on common FM VII.B.3.b.(ii) the role of FM on voice perception VII.B.3.c. Endless decreasing pitch VII.B.3.d. Perceptual fill-in VII.B.3.d.(i) gaps in FM VII.B.3.d.(ii) gaps in speech VII.B.3.e Perceptual grouping rules VII.B.3.e.(i) rapid presentation VII.B.3.e.(ii) frequency proximity VII.B.3.e.(iii) across group discrimination is difficult VII.B.3.f Prior expectations affect perception (feedback and prediction)
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VII.A.2 Different types of sensory systems Present Flag illusion Sensory systems are those parts of the nervous system which give an organism information about the external world and the organism’s internal state. In this course we will not talk about visceroreceptors which give us information about blood pressure, blood pH, etc. NPB 101 talks about these sorts of sensory systems extensively. Sense Name of system Type of Receptor VII.A.3 Sensory transduction and receptor potentials As a first step in the perception of a stimulus, signals from the environment must be transformed into neuronal activity. This process is called Sensory receptor cells have mechanisms which act either directly or indirectly (through 2 nd messengers) to either open or close ion channels. What is the general effect of either opening or closing ion channels? Receptor potentials are very similar to post-synaptic potentials. How
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introsens_r2 - General Properties of Sensory Systems...

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