Fri, 25 Jul 2008 15:37:49 BST CiteULike: mbregman attention http://www.citeulike.org/user/mbregman/tag/attention CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/mbregman/article/1645593 <i>J Neurosci, Vol. 24, No. 47. (24 November 2004), pp. 10702-10706.</i><br /><br />Selective attention contributes to perceptual efficiency by modulating cortical activity according to task demands. Visual attention is controlled by activity in posterior parietal and superior frontal cortices, but little is known about the neural basis of attentional control within and between other sensory modalities. We examined human brain activity during attention shifts between vision and audition. Attention shifts from vision to audition caused increased activity in auditory cortex and decreased activity in visual cortex and vice versa, reflecting the effects of attention on sensory representations. Posterior parietal and superior prefrontal cortices exhibited transient increases in activity that were time locked to the initiation of voluntary attention shifts between vision and audition. These findings reveal that the attentional control functions of posterior parietal and superior prefrontal cortices are not limited to the visual domain but also include the control of crossmodal shifts of attention. Control of attention shifts between vision and audition in human cortex. S Shomstein S Yantis doi:10.1523/JNEUROSCI.2939-04.2004 J Neurosci, Vol. 24, No. 47. (24 November 2004), pp. 10702-10706. 2007-09-11T21:07:39-00:00 2004 J Neurosci 1529-2401 24 47 10702 10706 attention http://www.citeulike.org/user/mbregman/article/500305 <i>Brain Res Cogn Brain Res, Vol. 24, No. 1. (June 2005), pp. 117-126.</i><br /><br />Relatively little is known about the dynamics of auditory cortical rhythm processing using non-invasive methods, partly because resolving responses to events in patterns is difficult using long-latency auditory neuroelectric responses. We studied the relationship between short-latency gamma-band (20-60 Hz) activity (GBA) and the structure of rhythmic tone sequences. We show that induced (non-phase-locked) GBA predicts tone onsets and persists when expected tones are omitted. Evoked (phase-locked) GBA occurs in response to tone onsets with approximately 50 ms latency, and is strongly diminished during tone omissions. These properties of auditory GBA correspond with perception of meter in acoustic sequences and provide evidence for the dynamic allocation of attention to temporally structured auditory sequences. Gamma-band activity reflects the metric structure of rhythmic tone sequences. JS Snyder EW Large doi:10.1016/j.cogbrainres.2004.12.014 Brain Res Cogn Brain Res, Vol. 24, No. 1. (June 2005), pp. 117-126. 2006-02-09T21:34:36-00:00 2005 Brain Res Cogn Brain Res 0926-6410 24 1 117 126 attention auditory erp musicperception rhythm http://www.citeulike.org/user/mbregman/article/957331 <i>Trends in Cognitive Sciences, Vol. 3, No. 4. (1 April 1999), pp. 151-162.</i><br /><br />We experience objects as whole, complete entities irrespective of whether they are perceived by our sensory systems or are recalled from memory. However, it is also known that many of the properties of objects are encoded and processed in different areas of the brain. How then, do coherent representations emerge? One theory suggests that rhythmic synchronization of neural discharges in the gamma band (around 40 Hz) may provide the necessary spatial and temporal links that bind together the processing in different brain areas to build a coherent percept. In this article we propose that this mechanism could also be used more generally for the construction of object representations that are driven by sensory input or internal, top-down processes. The review will focus on the literature on gamma oscillatory activities in humans and will describe the different types of gamma responses and how to analyze them. Converging evidence that suggests that one particular type of gamma activity (induced gamma activity) is observed during the construction of an object representation will be discussed. Oscillatory gamma activity in humans and its role in object representation Catherine Tallon-Baudry Olivier Bertrand doi:10.1016/S1364-6613(99)01299-1 Trends in Cognitive Sciences, Vol. 3, No. 4. (1 April 1999), pp. 151-162. 2006-11-22T10:25:51-00:00 1999 Trends in Cognitive Sciences 3 4 151 162 attention auditory erp representation visual http://www.citeulike.org/user/mbregman/article/2364342 <i>Cognitive Psychology, Vol. 41, No. 3. (November 2000), pp. 254-311.</i><br /><br />Seven experiments examine the influence of contextual timing manipulations on prospective time judgments. Subjects judged durations of standard vs comparison time intervals in the context of a preceding induction (context) sequence. In some experiments, the rate of the induction sequence was systematically manipulated relative to the range of to-be-judged standard time intervals; in others, the induction sequence was omitted. Time judgments were strongly influenced by the rate of an induction sequence with best performance occurring when the standard time interval ended as expected, given context rate. An expectancy profile, in the form of an inverted U, indicated that time estimation accuracy declined systematically as a standard interval differed from a context rate. A similar expectancy profile emerged when the context rate was based on a harmonic subdivision (one-half) of an expected standard interval. Results are discussed in terms of various stimulus-based models of prospective time judgments, including those which appeal to attentional periodicities and entrainment. Expectancy, Attention, and Time Ralph Barnes Mari Jones doi:10.1006/cogp.2000.0738 Cognitive Psychology, Vol. 41, No. 3. (November 2000), pp. 254-311. 2008-02-12T01:20:51-00:00 2000 Cognitive Psychology 41 3 254 311 attention expectation time http://www.citeulike.org/user/mbregman/article/239100 <i>Psychonomic Bulletin & Review, Vol. 12, No. 2. (April 2005), pp. 328-334.</i> Attentional Preparation Based on Temporal Expectancy Modulates Processing at the Perceptual Level Angel Correa Juan Lupianez Pio Tudela Psychonomic Bulletin & Review, Vol. 12, No. 2. (April 2005), pp. 328-334. 2005-06-27T21:17:17-00:00 2005 Psychonomic Bulletin & Review 1069-9384 12 2 328 334 Psychonomic Society Publications attention expectation rhythm http://www.citeulike.org/user/mbregman/article/2364197 <i>Advances in Cognitive Psychology, Vol. 2 (2006), pp. 221-231.</i><br /><br />Temporal expectancy is thought to play a fundamental role in the perception of rhythm. This review summarizes recent studies that investigated rhythmic expectancy by recording neuroelectric activity with high temporal resolution during the presentation of rhythmic patterns. Prior event-related brain potential (ERP) studies have uncovered auditory evoked responses that reflectdetectionofonsets,offsets,sustains,and abrupt changes in acoustic properties such as frequency, intensity, and spectrum, in addition to indexing higher-order processes such as auditory sensory memory and the violation of expectancy. In our studies of rhythmic expectancy, we measured emitted responses – a type of ERP that occurs when an expected event is omitted from a regular series of stimulus events – in simple rhythms with temporal structures typical of music. Our observations suggest that middle-latency gamma band (20-60 Hz) activity (GBA) plays an essential role in auditory rhythm processing. Evoked (phase-locked) GBA occurs in the presence of physically presented auditory events and reflectsthedegreeofaccent.Induced (non-phase-locked) GBA reflectstemporally precise expectancies for strongly and weakly accented events in sound patterns. Thus far, these findingssupporttheoriesofrhythmperception that posit temporal expectancies generated by active neural processes. Neural correlates of rhythmic expectancy Theodore Zanto Joel Snyder Edward Large Advances in Cognitive Psychology, Vol. 2 (2006), pp. 221-231. 2008-02-12T00:12:34-00:00 2006 Advances in Cognitive Psychology 2 221 231 attention auditory erp expectation rhythm http://www.citeulike.org/user/mbregman/article/2364062 <i>Psychological Review, Vol. 106, No. 1. (1999), pp. 119-159.</i> The Dynamics of Attending: How People Track Time-Varying Events Edward Large Mari Jones Psychological Review, Vol. 106, No. 1. (1999), pp. 119-159. 2008-02-11T22:44:04-00:00 1999 Psychological Review 106 1 119 159 attention auditory rhythm time