Behavioral demand modulates object category representation in the inferior temporal cortex

被引:12
作者
Emadi, Nazli [1 ,2 ,3 ,4 ]
Esteky, Hossein [1 ,2 ]
机构
[1] Sch Cognit Sci, Inst Res Fundamental Sci IPM, Tehran, Iran
[2] Shahid Beheshti Univ, Res Ctr Brain & Cognit, Sch Med, Tehran, Iran
[3] Stanford Univ, Sch Med, Howard Hughes Med Inst, Stanford, CA 94305 USA
[4] Stanford Univ, Sch Med, Dept Neurobiol, Stanford, CA 94305 USA
基金
美国国家科学基金会;
关键词
object category; behavioral demand; visual perception; inferior temporal cortex; MACAQUE INFEROTEMPORAL CORTEX; MONKEY VISUAL-CORTEX; PREFRONTAL CORTEX; CEREBRAL-CORTEX; AREA V4; NEURONS; ATTENTION; CATEGORIZATION; SELECTIVITY; RESPONSES;
D O I
10.1152/jn.00761.2013
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Visual object categorization is a critical task in our daily life. Many studies have explored category representation in the inferior temporal (IT) cortex at the level of single neurons and population. However, it is not clear how behavioral demands modulate this category representation. Here, we recorded from the IT single neurons in monkeys performing two different tasks with identical visual stimuli: passive fixation and body/object categorization. We found that category selectivity of the IT neurons was improved in the categorization compared with the passive task where reward was not contingent on image category. The category improvement was the result of larger rate enhancement for the preferred category and smaller response variability for both preferred and nonpreferred categories. These specific modulations in the responses of IT category neurons enhanced signal-to-noise ratio of the neural responses to discriminate better between the preferred and nonpreferred categories. Our results provide new insight into the adaptable category representation in the IT cortex, which depends on behavioral demands.
引用
收藏
页码:2628 / 2637
页数:10
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