PSYCH 454 Lecture Notes - Lecture 6: Retina, Proprioception, Posterior Parietal Cortex

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Position is only meaningful with reference to known point(s) Ex: in lecture hall, a reference point might be the lectern. Reference frame: a coordinate system used to represent the position of an object, etc. The origin of the coordinate system is a particular reference point. Egocentric reference frame: specifying the position of something relative to yourself. Allocentric reference frame: specifying the position of something relative to something other than yourself. Eye-centered (retinotopic): eye as origin of coordinate system (used by visual system) Head-centered: head as origin of coordinate system (used by auditory and other systems) Body-centered: body or body part as origin of coordinate system. Object-centered: particular object as origin of coordinate system. If the rf moves when lectern moves, then the neuron represents space in egocentric coordinates (lectern moves, door moves) If the rf does not move when lectern moves, then the neuron represents space in allocentric coordinates (lectern moves, door doesn"t move)

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