PSYB55H3 Chapter 7: PSYB55 Chapter 7 Notes
Document Summary
Attention: balint"s syndrome: a disorder following bilateral occipitoparietal stroke, characterized by difficulty in perceiving visual objects. Patients w/ the disorder can correctly identify objects but have difficulty relating objects to one another. Selective att"n can be distinguished from nonselective att"n, which includes simple behavioural arousal (i. e. , being generally more vs. less attentive). Attention is the ability to focus awareness on one stimulus, thought, or action while ignoring other irrelevant stimuli, thoughts, and actions. Arousal is a global physiological and psychological brain state, whereas selective att"n describes what we attend and ignore w/i any specific level (high vs. low) of arousal. Attention infl"s how we process sensory inputs, store that info in memory, process it semantically, and act on it. Neglect is most closely assoc"d w/ damage to the r parietal cortex: extinction: the failure to perceive or respond to a stimulus contralateral to a lesion (contralesional) when presented w/ a simultaneous stimulus ipsilateral to the lesion (ipsilesional).
