Motor Vehicle Crash Fatalities for Week Ending, December 18, 2009

Motor Vehicle Crash Fatalities

Motor Vehicle Crash Fatalities for Week Ending, January 1, 2010

Motor Vehicle Crash Fatalities

Motor Vehicle Crash Fatalities for Week Ending, January 8, 2010

Motor Vehicle Crash Fatalities

Equipment and Vehicle Purchase Report for Fiscal Year 2009 as required by Iowa Code section 307.47

Attached is the Equipment and Vehicle Purchase Report for Fiscal Year 2009 as required by Iowa Code section 307.47. The report is sorted by Iowa Department of Transportation accounting object codes.

The effects of physiologically plausible connectivity structure on local and global dynamics in large scale brain models.

Functionally relevant large scale brain dynamics operates within the framework imposed by anatomical connectivity and time delays due to finite transmission speeds. To gain insight on the reliability and comparability of large scale brain network simulations, we investigate the effects of variations in the anatomical connectivity. Two different sets of detailed global connectivity structures are explored, the first extracted from the CoCoMac database and rescaled to the spatial extent of the human brain, the second derived from white-matter tractography applied to diffusion spectrum imaging (DSI) for a human subject. We use the combination of graph theoretical measures of the connection matrices and numerical simulations to explicate the importance of both connectivity strength and delays in shaping dynamic behaviour. Our results demonstrate that the brain dynamics derived from the CoCoMac database are more complex and biologically more realistic than the one based on the DSI database. We propose that the reason for this difference is the absence of directed weights in the DSI connectivity matrix.

Motor Vehicle Crash Fatalities for Week Ending, January 15, 2010

Motor Vehicle Crash Fatalities

Motor Vehicle Crash Fatalities for Week Ending, January 22, 2010

Motor Vehicle Crash Fatalities

Motor Vehicle Crash Fatalities for Week Ending, January 29, 2010

Motor Vehicle Crash Fatalities

Motor Vehicle Crash Fatalities for Week Ending, February 5, 2010

Motor Vehicle Crash Fatalities

Motor Vehicle Crash Fatalities for Week Ending, February 12, 2010

Motor Vehicle Crash Fatalities

Motor Vehicle Crash Fatalities for Week Ending, February 19, 2010

Motor Vehicle Crash Fatalities

Motor Vehicle Crash Fatalities for Week Ending, February 29, 2010

Motor Vehicle Crash Fatalities

Motor Vehicle Crash Fatalities for Week Ending, March 5, 2010

Motor Vehicle Crash Fatalities

Brain dynamics underlying training-induced improvement in suppressing inappropriate action.

Inhibitory control, a core component of executive functions, refers to our ability to suppress intended or ongoing cognitive or motor processes. Mostly based on Go/NoGo paradigms, a considerable amount of literature reports that inhibitory control of responses to "NoGo" stimuli is mediated by top-down mechanisms manifesting ∼200 ms after stimulus onset within frontoparietal networks. However, whether inhibitory functions in humans can be trained and the supporting neurophysiological mechanisms remain unresolved. We addressed these issues by contrasting auditory evoked potentials (AEPs) to left-lateralized "Go" and right NoGo stimuli recorded at the beginning versus the end of 30 min of active auditory spatial Go/NoGo training, as well as during passive listening of the same stimuli before versus after the training session, generating two separate 2 × 2 within-subject designs. Training improved Go/NoGo proficiency. Response times to Go stimuli decreased. During active training, AEPs to NoGo, but not Go, stimuli modulated topographically with training 61-104 ms after stimulus onset, indicative of changes in the underlying brain network. Source estimations revealed that this modulation followed from decreased activity within left parietal cortices, which in turn predicted the extent of behavioral improvement. During passive listening, in contrast, effects were limited to topographic modulations of AEPs in response to Go stimuli over the 31-81 ms interval, mediated by decreased right anterior temporoparietal activity. We discuss our results in terms of the development of an automatic and bottom-up form of inhibitory control with training and a differential effect of Go/NoGo training during active executive control versus passive listening conditions.