title: Optimized neural coding? Control mechanisms in large cortical networks implemented by connectivity changes.
abstract: Using functional magnetic resonance imaging, we show that a distributed fronto-parietal visuomotor integration network is recruited to overcome automatic responses to both biological and nonbiological cues. Activity levels in these areas are similar for both cue types. The functional connectivity of this network, however, reveals differential coupling with thalamus and precuneus (biological cues) and extrastriate cortex (nonbiological cues). This suggests that a set of cortical areas equally activated in two tasks may accomplish task goals differently depending on their network interactions. This supports models of brain organization that emphasize efficient coding through changing patterns of integration between regions of specialized function.
authors: Neuroscience Interdepartmental Program, University of California, Los Angeles, CA, USA. katycross@ucla.edu
authors: Katy A
authors: KA
authors: Cross
authors: Marco
authors: M
authors: Iacoboni
mesh_terms: D000293:Adolescent; D000328:Adult; D001921:Brain / Q000166:cytology / Q000502:physiology*; D001931:Brain Mapping / Q000379:methods; D003463:Cues; D056344:Executive Function / Q000502:physiology*; D005260:Female; D006179:Gyrus Cinguli / Q000166:cytology / Q000502:physiology; D006801:Humans; D007100:Imitative Behavior / Q000502:physiology*; D033182:Intention; D008279:Magnetic Resonance Imaging; D008297:Male; D009044:Motor Cortex / Q000166:cytology / Q000502:physiology; D009434:Neural Pathways / Q000166:cytology / Q000502:physiology; D010296:Parietal Lobe / Q000166:cytology / Q000502:physiology; D011597:Psychomotor Performance / Q000502:physiology; D013028:Space Perception / Q000502:physiology*; D013788:Thalamus / Q000166:cytology / Q000502:physiology; D014793:Visual Cortex / Q000166:cytology / Q000502:physiology; D055815:Young Adult