PT J
AU Hilti, CC
Jann, K
Heinemann, D
Federspiel, A
Dierks, T
Seifritz, E
Cattapan-Ludewig, K
AF Hilti, Caroline C.
Jann, Kay
Heinemann, Doerthe
Federspiel, Andrea
Dierks, Thomas
Seifritz, Erich
Cattapan-Ludewig, Katja
TI Evidence for a cognitive control network for goal-directed attention in
simple sustained attention
SO BRAIN AND COGNITION
AB The deterioration of performance over time is characteristic for
sustained attention tasks. This so-called "performance decrement" is
measured by the increase of reaction time (RT) over time. Some
behavioural and neurobiological mechanisms of this phenomenon are not
yet fully understood. Behaviourally, we examined the increase of RT over
time and the inter-individual differences of this performance decrement.
On the neurophysiological level, we investigated the task-relevant brain
areas where neural activity was modulated by RT and searched for brain
areas involved in good performance (i.e. participants with no or
moderate performance decrement) as compared to poor performance (i.e.
participants with a steep performance decrement). For this purpose, 20
healthy, young subjects performed a carefully designed task for simple
sustained attention, namely a low-demanding version of the Rapid Visual
Information Processing task We employed a rapid event-related functional
magnetic resonance imaging (fMRI) design. The behavioural results showed
a significant increase of RT over time in the whole group, and also
revealed that some participants were not as prone to the performance
decrement as others. The latter was statistically significant comparing
good versus poor performers. Moreover, high BOLD-responses were linked
to longer RTs in a task-relevant bilateral
fronto-cingulate-insular-parietal network. Among these regions, good
performance was associated with significantly higher RI-BOLD
correlations in the pre-supplementary motor area (pre-SMA). We concluded
that the task-relevant bilateral fronto-cingulate-insular-parietal
network was a cognitive control network responsible for goal-directed
attention. The pre-SMA in particular might be associated with the
performance decrement insofar that good performers could sustain
activity in this brain region in order to monitor performance declines
and adjust behavioural output. (C) 2012 Elsevier Inc. All rights
reserved.
PD MAR
PY 2013
VL 81
IS 2
BP 193
EP 202
ER
AU Hilti, CC
Jann, K
Heinemann, D
Federspiel, A
Dierks, T
Seifritz, E
Cattapan-Ludewig, K
AF Hilti, Caroline C.
Jann, Kay
Heinemann, Doerthe
Federspiel, Andrea
Dierks, Thomas
Seifritz, Erich
Cattapan-Ludewig, Katja
TI Evidence for a cognitive control network for goal-directed attention in
simple sustained attention
SO BRAIN AND COGNITION
AB The deterioration of performance over time is characteristic for
sustained attention tasks. This so-called "performance decrement" is
measured by the increase of reaction time (RT) over time. Some
behavioural and neurobiological mechanisms of this phenomenon are not
yet fully understood. Behaviourally, we examined the increase of RT over
time and the inter-individual differences of this performance decrement.
On the neurophysiological level, we investigated the task-relevant brain
areas where neural activity was modulated by RT and searched for brain
areas involved in good performance (i.e. participants with no or
moderate performance decrement) as compared to poor performance (i.e.
participants with a steep performance decrement). For this purpose, 20
healthy, young subjects performed a carefully designed task for simple
sustained attention, namely a low-demanding version of the Rapid Visual
Information Processing task We employed a rapid event-related functional
magnetic resonance imaging (fMRI) design. The behavioural results showed
a significant increase of RT over time in the whole group, and also
revealed that some participants were not as prone to the performance
decrement as others. The latter was statistically significant comparing
good versus poor performers. Moreover, high BOLD-responses were linked
to longer RTs in a task-relevant bilateral
fronto-cingulate-insular-parietal network. Among these regions, good
performance was associated with significantly higher RI-BOLD
correlations in the pre-supplementary motor area (pre-SMA). We concluded
that the task-relevant bilateral fronto-cingulate-insular-parietal
network was a cognitive control network responsible for goal-directed
attention. The pre-SMA in particular might be associated with the
performance decrement insofar that good performers could sustain
activity in this brain region in order to monitor performance declines
and adjust behavioural output. (C) 2012 Elsevier Inc. All rights
reserved.
PD MAR
PY 2013
VL 81
IS 2
BP 193
EP 202
ER
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