PSYCH 345 Lecture Notes - Lecture 23: Simultanagnosia, Agraphia, Commissure
4 Apr 2016
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3 theories of neglect: bisiach"s representaional account. People with hemispherical neglect= neglects one side and can describe other side; switch to opposite side= neglects sight they previously described, can describe what they previously didn"t see: atenional accounts: Atenion is selecive: covert gaze vs overt, covert gaze is disrupted in neglect. Precueing task: right neglect people get let target detecion wrong a lot. Therefore when right hemisphere is damaged, let hemisphere takes control and atenion is diverted to the right. Three theories are compaible b/c we assume let hemisphere is stronger, and we can divert atenion, and that right atenional bias will be expressed. Reinotopic: deined in relaion to reina: allocentric: deined independently of observer. E: lesion causes inability to see object in that ield. Simultanagnosia: cannot integrate more than one thing in visual ield. Connecions of corpus callosum: rostrum: temporal and frontal. Let and right orbital corices: genus: pr efrontal cortex, rostral body=frontal and parietal.
