NEUR3018 - L7.

Zsofi Dombi
Flashcards by Zsofi Dombi, updated more than 1 year ago
Zsofi Dombi
Created by Zsofi Dombi over 2 years ago
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NEUR3018 Flashcards on NEUR3018 - L7., created by Zsofi Dombi on 04/11/2018.
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Spatial Coding systems 1. Allocentric - object-to-object 2. Egocentric - self-to-object
Allocentric encodes infromation about one object with respect to other objects
Egocentric represents the location of objects in space relative to the location of other objects
hemispatial neglect a neurophysiological condition in which after damage to one hemisphere of the brain is sustained, a deficit in attention to and awareness of one seide of the field of vision is observed
Mort et al (2003) - MRI to map lesions of 35 right-hemisphere patients who suffered either middle or posterior cerebral artery stroke - MCA: angular gyrus of inferior parietal lobe - PCA: parahippocampal region of medial temporal lobe
Halligan and Marshall (1998) symptomatology of neglect: disconnection between brain mechanissm that are relatively specialized by local visual processing and global processing
Karnath et al (1997) neglect acts with respect to different egocentric reference of frames - thus turning trunk to left improves perception - but no improvement with turning the head
colonic stimulation able to temporarily improve the englect through partial reactivation of a vestibular network in the lesioned hemisphere which is part of a system that codes egocentric space
Bisiach & Luzatti (1978) the Milan Square experiment
Andersen et al (1985) recordings from single neurons from rhesus monkeys: the visual sensitivity of the retinotropic receptive fields changes systematically with the angle of gaze
Pouget & Driver (2000) relationship between the physiology of monkey parietal neruons and neglect in human patients: - parietal regions include neurons with mostly contralateral space, but there are some ipsilaterl too - decreases monotonically - parietal loss or dysfunction of similar cells like in monkeys
Gottlieb et al (1998) parietal neuron responses are modulated by attention LIP has little or no response to stimuli brought into their receptive field unless the stimuli were behaviourally significant
Burgess et al (2001) VR study on memory for spatial conetxt of controlled but lifelike events - retrieval of spatial context: parahippocampal, right posterior parietal area
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