PSYC 213 Lecture Notes - Hermann Ebbinghaus, Hemispatial Neglect, Superior Colliculus

• School: McGill University
• Department: Psychology
• Course: PSYC 213
• Professor: Jelena Ristic

Document Summary

This condition is sometimes accompanied by a failure to report stimuli located in the contralesional visual field when there is a competing stimulus in the ipsilesional field; this is called extinction. Balint"s syndrome is another neuropsychological disorder that results in attentional dysfunctions. It results from damge to both the right and the left parietal lobes. Patients with this disorder lose all experience of space, can only see one object at a time, without being able to report where that object is located or whether the object is moving toward or away from them. The three main symptoms of balint"s syndrom (not all people with this disorder have all three symptoms): Simultagnosia: inability to perceive multiple objects: optic ataxia: problems controlling voluntary motor movements, optic apraxia: severe problems controlling voluntary eye movements. There are two distinct cortical networks that control attention: the network controlling reflexive orienting and the one that controls volitional orienting. Subcortical structures like the superior colliculus are implicated.