Is vision in schizophrenia characterized by a generalized reduction?

Frontiers in Psychology

Bernt C. Skottun¹ 

关键词: schizophrenia;    vision;    sensitivity;    VEPs;    magnocellular;   

DOI  :  10.3389/fpsyg.2013.00999

学科分类：心理学（综合）

来源: Frontiers

【 摘 要 】

How the visual capabilities of those with schizophrenia differ from those of individuals without schizophrenia is a topic of active research. Of special interest is the question of whether or not they might have a magnocellular deficiency. It has been concluded that contrast sensitivity in schizophrenic subjects is characterized by a general reduction in sensitivity, and so does not indicate a magnocellular deficiency (Skottun and Skoyles, 2007). Likewise, many of the reported cases of abnormal visual masking linked to schizophrenia can be described by a general reduction (see, e.g., Rassovsky et al., 2004). Also this is hard to reconcile with a magnocellular deficit since, according to the theory, such a deficit would have been expected to cause a reduction that was related specifically to the U-shaped Type-B masking function (Skottun and Skoyles, 2009). These observations prompt the question of whether or not other differences between schizophrenic subjects and controls that have been attributed to magnocellular deficiencies can also be accounted by a general reduction in sensitivity or response.

【 授权许可】

CC BY