Sunday, June 5, 2016

Leonard Koziol Assumptions of brain organization

Traditional "domains" are artficial constructs:  language, visuospatial function, memory, attention, executive function, visuomotor integration. 
Frontal lobe construts such as working memory, inhibition, shifting and planning are not monolithic entitites.  All are multicomponent processes
Koziol says the functional arhitectural organization of the brain has other principal connections:
cortical basal ganglia
cerebro cerebellar
basal ganglia cerebellar
Yeo and colleague J Neurophysiol 2011 described seven functional patterns of connnectivity:
FPN frontoparietal networks engages effortful cognitive tasks that require rules or information to be kept in mind for guiding behavior (cognitive control network)
VAN ventral attention network subserves object identification that includes contextual salience or reward value by identifying objects and what they are used for
DAN dorsal attention networks plays primary role in spatial attention, attentional shifting, object location and information about how objects are used.
VAN, DAN and FPN together form an "actional control network."
VN interacts with VAN and DAN to sustain attention and to suppress attention to irrelevant stimuli.
SMN sensorimotor network executes motor activity programmed by other networks.
LN limbic network interacts with the above to generate motivational and reward networks.
DMN default mode network is active at rest doing nothingbut thinking, imagining or dreaming
Castellanos et al. provides anatomy of above Trends  Cogn Neurosci 2012

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