 |
||||
|
||||
|
||||
|
||||
The Journal of Neuroscience, September 7, 2005, 25(36):8259-8266; doi:10.1523/JNEUROSCI.1821-05.2005
Previous Article | Next Article
Behavioral/Systems/Cognitive
Synergistic Effect of Combined Temporal and Spatial Expectations on Visual Attention
Joanna R. Doherty,1 Anling Rao,1 M. Marsel Mesulam,2 andAnna C. Nobre1,2 1Brain and Cognition Laboratory, Department of Experimental Psychology, University of Oxford, Oxford OX1 3UD, United Kingdom, and 2Center for Cognitive and Behavioral Neurology and the Alzheimer's Disease Program, Northwestern University Medical School, Chicago, Illinois 60611
We developed a naturalistic behavioral task to investigate the influence of spatial and temporal expectations on attentional orienting to moving targets. In this task, the movement of an object before its disappearance under an occluding barrier generated expectations concerning the location and/or time of its reappearance. Four different trial types were intermixed, each inducing a different state of expectation: no expectation, only spatial expectation about the location of reappearance, only temporal expectation about the moment of reappearance, and combined spatial and temporal expectation. The behavioral validity of the task was shown by the fact that all expectation conditions produced significantly shorter reaction times than the control state of no expectation. Spatial attention modulated early perceptual analysis in extrastriate areas, as demonstrated by significant enhancement of the visual P1 component. Temporal attention alone had no effect on P1 but instead modulated response-specific components. However, when spatial and temporal attention were combined, the enhancement of perceptual processing was significantly augmented, leading to a greater enhancement of the P1 component than by spatial attention alone. Perceptual analysis reflected by the P1 component correlated significantly with reaction times. In summary, event-related potentials revealed the presence of individual modulatory effects attributable to spatial and temporal expectation as well as synergistic effects indicative of an interaction of the two. This synergistic effect is likely to play a critical role in directing attention to the reappearance of a temporarily occluded moving target, a process of obvious importance in everyday situations.
Key words: occlusion; event-related potentials; P1; spatial orienting; temporal orienting; parietal; attention
Received Feb 11, 2005; revised July 21, 2005; accepted July 25, 2005.
This article has been cited by other articles:
A. Correa and A. C. Nobre
Neural Modulation by Regularity and Passage of Time
J Neurophysiol, September 1, 2008; 100(3): 1649 - 1655.
[Abstract] [Full Text] [PDF]
T. C. Cristescu and A. C. Nobre
Differential modulation of word recognition by semantic and spatial orienting of attention.
J. Cogn. Neurosci., May 1, 2008; 20(5): 787 - 801.
[Abstract] [Full Text] [PDF]
L. D. SANDERS and L. B. ASTHEIMER
Temporally selective attention modulates early perceptual processing: Event-related potential evidence
Percept Psychophys, May 1, 2008; 70(4): 732 - 742.
[Abstract] [PDF]
J. Vibell, C. Klinge, M. Zampini, C. Spence, and A. C. Nobre
Temporal Order is Coded Temporally in the Brain: Early Event-related Potential Latency Shifts Underlying Prior Entry in a Cross-modal Temporal Order Judgment Task.
J. Cogn. Neurosci., January 1, 2007; 19(1): 109 - 120.
[Abstract] [Full Text] [PDF]
P. Praamstra, D. Kourtis, H. Fei Kwok, and R. Oostenveld
Neurophysiology of implicit timing in serial choice reaction-time performance.
J. Neurosci., May 17, 2006; 26(20): 5448 - 5455.
[Abstract] [Full Text] [PDF]
D. M. Eagleman, P. U. Tse, D. Buonomano, P. Janssen, A. C. Nobre, and A. O. Holcombe
Time and the Brain: How Subjective Time Relates to Neural Time
J. Neurosci., November 9, 2005; 25(45): 10369 - 10371.
[Abstract] [Full Text] [PDF]
|
|
|
|
 |
|