NBB 302 Chapter Notes - Chapter 4-5: Hermann Von Helmholtz, Frontal Lobe, Superior Colliculus
13 Feb 2018
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Unilater al spatial neglect attention network damaged in only 1 hemi: extinction: Can see stimuli in both visual fields but neglects contralateral if stimuli in both at one time. Shows network of cortical and subcortical areas from stroke. - unilateral lesions on parietal, posterior temporal, frontal cortex basal ganglia, thalamus, midbrain: damage to severe on. R hemi: reduced arousal/ processing speeds; attention bias on ipsilesional side, neglect to contralesio nal side/visual field, grooming half body, eating half of plate, reading one side of a book; Luzzatti) neglected contralatera l side; memory was also biased: bilateral occipitopari etal lesions, posterior parietal and occipital damage to both hemi -- > inability to perceive multiple objects in space. Bottlenecks (stage where only a certain amt of info can pass) occur at states of perceptual analysis that have limited capacity -- william james. Sensory inputs that can enter higher levels of brain are screened for "most important" to pass through.
