Intracortical Recordings During Attentional Tasks

In the last 10 years, a new field has emerged investigating in humans the functional role of high-frequency neural activity (so-called gamma-band activity, above 40 Hz) with intracerebral electroencephalography (ICE). Although restricted to patients, most of them suffering from intractable epilepsy, ICE has a combined spatiotemporal resolution unmatched by any other human brain imaging technique. In this chapter, we review the contribution of this field to the neuroscience of atten¬tion, with particular emphasis on studies investigating attentional modulation of high-level cognitive processes such as visual perception, memory, or language. Attention is shown to amplify gamma-band synchronization and desynchronization processes associated with cognition, both in early sensory areas and in temporal, parietal, and frontal associative areas. We argue that this effect of attention on gamma-band activity provides a sound basis for the development of quantitative indices of attention, and efficient attention-training systems based on noninvasive brain measures.

Abbreviations

DSI

Dynamical spectral imaging

EEG

Electroencephalography

fMRI

Functional magnetic resonance imaging

ICE

Intracerebral electroencephalography

MEG

Magnetoencephalography

PET

Positron emission tomography

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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  1. 1.INSERMInstitut Fédératif des Neurosciences, 69000 Lyon, France, Université Lyon 1LyonFrance
  2. 2.Programa de Fisiologia y Biofisica, Instituto de Ciencias Biomédicas, Facultad de MedicinaCentre Hospitalier Le Vinatier (Bât. 452)BronFrance
  3. 3.Programa de Fisiologia y Biofisica, Instituto de Ciencias Biomédicas, Facultad de MedicinaUniversidad de ChileCasillaChile

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