TY  - JOUR
AU  - Langner, R.
AU  - Kellermann, T.
AU  - Eickhoff, S. B.
AU  - Boers, F.
AU  - Chatterjee, A.
AU  - Willmes, K.
AU  - Sturm, W.
TI  - Staying responsive to the world: Modality-specific and -nonspecific contributions to speeded auditory, tactile and visual stimulus detection
JO  - Human brain mapping
VL  - 33
SN  - 1065-9471
CY  - New York, NY
PB  - Wiley-Liss
M1  - PreJuSER-12584
SP  - 398 - 418
PY  - 2012
N1  - Record converted from VDB: 12.11.2012
AB  - Sustained responsiveness to external stimulation is fundamental to many time-critical interactions with the outside world. We used functional magnetic resonance imaging during speeded stimulus detection to identify convergent and divergent neural correlates of maintaining the readiness to respond to auditory, tactile, and visual stimuli. In addition, using a multimodal condition, we investigated the effect of making stimulus modality unpredictable. Relative to sensorimotor control tasks, all three unimodal detection tasks elicited stronger activity in the right temporo-parietal junction, inferior frontal cortex, anterior insula, dorsal premotor cortex, and anterior cingulate cortex as well as bilateral mid-cingulum, midbrain, brainstem, and medial cerebellum. The multimodal detection condition additionally activated left dorsal premotor cortex and bilateral precuneus. Modality-specific modulations were confined to respective sensory areas: we found activity increases in relevant, and decreases in irrelevant sensory cortices. Our findings corroborate the modality independence of a predominantly right-lateralized core network for maintaining an alert (i.e., highly responsive) state and extend previous results to the somatosensory modality. Monitoring multiple sensory channels appears to induce additional processing, possibly related to stimulus-driven shifts of intermodal attention. The results further suggest that directing attention to a given sensory modality selectively enhances and suppresses sensory processing-even in simple detection tasks, which do not require inter- or intra-modal selection.
KW  - Acoustic Stimulation
KW  - Adult
KW  - Attention: physiology
KW  - Brain Mapping
KW  - Female
KW  - Humans
KW  - Image Processing, Computer-Assisted
KW  - Magnetic Resonance Imaging
KW  - Photic Stimulation
KW  - Reaction Time: physiology
KW  - Somatosensory Cortex: physiology
KW  - Touch Perception
LB  - PUB:(DE-HGF)16
C6  - pmid:21438078
UR  - <Go to ISI:>//WOS:000299071200012
DO  - DOI:10.1002/hbm.21220
UR  - https://juser.fz-juelich.de/record/12584
ER  -