Biophysical models of the prefrontal cortex neuronal architecture suggest that sustained D1 activation (tonic dopamine) helps establish and maintain the stability of neural networks by preventing uncontrolled, spontaneous switches into high activity states (i.e., spontaneous activation of task-irrelevant representations) [ 66].
The results provide support for the notion of network-specific effects in aging, manifested as increased tonic activation of task-positive networks, supporting higher-order cognitive functions and cognitive control, along with reduced task-negative default mode network and sensory visual networks during rest.
A novel authorization model that incorporates authorization rules is then proposed to support the planning of assigning tasks to roles/users, and the run-time activation of tasks.
In past work, we defined a mapping of synchronous models on a general class of distributed asynchronous architectures, for which the only requirement is a lower bound on the rate of activation of tasks.
Rare tones followed by an evoked KC, however, were associated with a wake-like activation of task-related areas in the temporal cortex, along with the right hippocampus.
Therefore, increased activation of task-specific auditory pathways associated with evoked KC is unlikely to reflect the neural representation of the KC itself.
Activation of TASK-2 by extracellular alkalinization is mediated by neutralization of R224 located near the second pore domain [20] and involves changes in open probability (Po) without affecting single channel conductance [8], [20], [21].
Indeed, two previous functional MRI studies in insomnia have also shown reduced activation of task-related brain regions in the absence of a behavioural deficit or compensatory BOLD activation in insomniacs relative to control subjects (Altena et al., 2008 a ; Drummond et al., 2013).
Again, ANOVA post hoc testing revealed a significant difference between MCI-Converter and MCI-Nonconverter groups, suggesting the prognostic value of fMRI activation, independent of task performance.
Adolescents showed greater relative activation of the task positive attention network and deactivation in the task negative network after chronic sleep restriction than when well-rested.
