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Brain networks underlying mental imagery of auditory and visual information.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Zvyagintsev, Mikhail Clemens, Benjamin Chechko, Natalya Mathiak, Krystyna A. Sack, Alexander T. Mathiak, Klaus
Description	Country affiliation: Germany Author Affiliation: Zvyagintsev M ( Department of Psychiatry, Psychotherapy and Psychosomatics, Medical School, RWTH Aachen University, Aachen, Germany. mzvyagintsev@ukaachen.de)
Abstract	Mental imagery is a complex cognitive process that resembles the experience of perceiving an object when this object is not physically present to the senses. It has been shown that, depending on the sensory nature of the object, mental imagery also involves correspondent sensory neural mechanisms. However, it remains unclear which areas of the brain subserve supramodal imagery processes that are independent of the object modality, and which brain areas are involved in modality-specific imagery processes. Here, we conducted a functional magnetic resonance imaging study to reveal supramodal and modality-specific networks of mental imagery for auditory and visual information. A common supramodal brain network independent of imagery modality, two separate modality-specific networks for imagery of auditory and visual information, and a common deactivation network were identified. The supramodal network included brain areas related to attention, memory retrieval, motor preparation and semantic processing, as well as areas considered to be part of the default-mode network and multisensory integration areas. The modality-specific networks comprised brain areas involved in processing of respective modality-specific sensory information. Interestingly, we found that imagery of auditory information led to a relative deactivation within the modality-specific areas for visual imagery, and vice versa. In addition, mental imagery of both auditory and visual information widely suppressed the activity of primary sensory and motor areas, for example deactivation network. These findings have important implications for understanding the mechanisms that are involved in generation of mental imagery.
File Format	HTM / HTML
ISSN	0953816X
Issue Number	9
Volume Number	37
e-ISSN	14609568
Journal	European Journal of Neuroscience
Language	English
Publisher	Wiley-Blackwell
Publisher Date	2013-05-01
Publisher Place	France
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Neuroscience Auditory Perception Physiology Brain Imagination Nerve Net Visual Perception Acoustic Stimulation Adult Attention Brain Mapping Female Humans Magnetic Resonance Imaging Male Memory Photic Stimulation Semantics Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Neuroscience

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