Abstract
The anterior directicting attention negativity (ADAN) and the late directing attention positivity (LDAP) event-related potential (ERP) components elicited during covert shifts of spatial attention operate according different spatial coordinate systems. While the LDAP is based on external spatial coordinates, the ADAN operates on anatomically defined spatial codes. These components have been consistently found not only during covert shifts of spatial attention but also during covert movement preparation, suggesting that common mechanisms are involved in the control of spatial attention and action.
The present study investigated whether the ADAN elicited during covert movement preparation operates within anatomically defined spatial coordinates. Lateralized ERP components were recorded during a response precuing paradigm where precues indicated the side of the motor response. In different blocks, hands were uncrossed or crossed, so that external and anatomical codes were either congruent or incongruent. With uncrossed hands, the ADAN was elicited contralateral to the side of a cued motor response. In contrast to previous studies on covert shifts of spatial attention, the ADAN did not reverse polarity with crossed relative to uncrossed hands, suggesting that this component does not operate within anatomically defined spatial coordinates during covert movement preparation. These results provide the first evidence that the anterior processes involved in spatial attention and action may use different spatial coordinate systems depending on the specific task being performed.
The present study investigated whether the ADAN elicited during covert movement preparation operates within anatomically defined spatial coordinates. Lateralized ERP components were recorded during a response precuing paradigm where precues indicated the side of the motor response. In different blocks, hands were uncrossed or crossed, so that external and anatomical codes were either congruent or incongruent. With uncrossed hands, the ADAN was elicited contralateral to the side of a cued motor response. In contrast to previous studies on covert shifts of spatial attention, the ADAN did not reverse polarity with crossed relative to uncrossed hands, suggesting that this component does not operate within anatomically defined spatial coordinates during covert movement preparation. These results provide the first evidence that the anterior processes involved in spatial attention and action may use different spatial coordinate systems depending on the specific task being performed.
Original language | English |
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Publication status | Published - 2010 |
Event | Society for Psychophysiological Research, 50th Annual Meeting - Oregon, Portland , United Kingdom Duration: 29 Sept 2009 → 3 Oct 2009 |
Conference
Conference | Society for Psychophysiological Research, 50th Annual Meeting |
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Country/Territory | United Kingdom |
City | Portland |
Period | 29/09/09 → 3/10/09 |