Flashcards
NEUR3018 - L7.
Cards in this deck (13)
- 1Spatial Coding systems1. Allocentric - object-to-object
2. Egocentric - self-to-object - 2Allocentricencodes infromation about one object with respect to other objects
- 3Egocentricrepresents the location of objects in space relative to the location of other objects
- 4hemispatial neglecta 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
- 5Mort 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 - 6Halligan and Marshall (1998)symptomatology of neglect: disconnection between brain mechanissm that are relatively specialized by local visual processing and global processing
- 7Karnath 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 - 8colonic stimulationable 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
- 9Bisiach & Luzatti (1978)the Milan Square experiment
- 10Andersen 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 - 11Pouget & 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 - 12Gottlieb 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 - 13Burgess 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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- NEUR3018 Flashcards on NEUR3018 - L7., created by Zsofi Dombi on 11/04/2018.
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