Unconscious processing dissociates along categorical lines

被引：150

作者：

Almeida, Jorge ^{[1
,2
]}

Mahon, Bradford Z. ^{[1
,3
]}

Nakayama, Ken ^{[2
]}

Caramazza, Alfonso ^{[1
,3
]}

机构：

[1] Harvard Univ, Cognit Neuropsychol Lab, Cambridge, MA 02138 USA

[2] Harvard Univ, Vis Sci Lab, Cambridge, MA 02138 USA

[3] Univ Trent, Ctr Mind Brain Sci, I-38068 Rovereto, Italy

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2008年 / 105卷 / 39期

基金：

美国国家卫生研究院; 美国国家科学基金会;

关键词：

binocular rivalry; continuous flash suppression; dorsal stream; object categorization; tools;

D O I：

10.1073/pnas.0805867105

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Visual object recognition is subserved by ventral temporal and occipital regions of the brain. Regions comprising the dorsal visual pathway have not been considered relevant for object recognition, despite strong categorical biases for tool-related information in those regions. Here, we show that dorsal stream processes influence object categorization. We used two techniques to render prime pictures invisible: continuous flash suppression ( CFS), which obliterates input into ventral temporal regions, but leaves dorsal stream processes largely unaffected, and backward masking ( BM), which allows suppressed information to reach both ventral and dorsal stream structures. Categorically congruent primes suppressed under CFS facilitate categorization of tools but have no effect on nonmanipulable objects; in contrast, primes rendered invisible through BM facilitate target categorization for both tools and nonmanipulable things. Our findings demonstrate that information computed by the dorsal stream is used in object categorization, but only for a category of manipulable objects.

引用

页码：15214 / 15218

页数：5