Connectivity between the cerebrum and cerebellum during social and non-social sequencing using dynamic causal modelling

Publication date: Available online 1 November 2019Source: NeuroImageAuthor(s): Frank Van Overwalle, Frederik Van de Steen, Kim van Dun, Elien HelevenAbstractThis analysis explores the effective connectivity of the cerebellum with the cerebral cortex during the generation of correct sequences of social and non-social events, using dynamic causal modelling (DCM). Our hypothesis is that during human evolution, the cerebellum's function evolved from a mere coordinator of fluent sequences of motions and...

NeuroImage

Fri Nov 01, 2019 21:29

A distributed multitask multimodal approach for the prediction of Alzheimer's disease in a longitudinal study

Publication date: Available online 1 November 2019Source: NeuroImageAuthor(s): Solale Tabarestani, Maryamossadat Aghili, Mohammad Eslami, Mercedes Cabrerizo, Armando Barreto, Naphtali Rishe, Rosie E. Curiel, David Loewenstein, Ranjan Duara, Malek AdjouadiAbstractPredicting the progression of Alzheimer's Disease (AD) has been held back for decades due to the lack of sufficient longitudinal data required for the development of novel machine learning algorithms. This study proposes a novel machine learning...

NeuroImage

Fri Nov 01, 2019 21:29

Neurophysiological basis of contrast dependent BOLD orientation tuning

Publication date: Available online 31 October 2019Source: NeuroImageAuthor(s): R. Butler, G.W. Mierzwinski, P.M. Bernier, M. Descoteaux, G. Gilbert, K. WhittingstallAbstractRecent work in early visual cortex of humans has shown that the BOLD signal exhibits contrast dependent orientation tuning, with an inverse oblique effect (oblique > cardinal) at high contrast and a horizontal effect (vertical > horizontal) at low contrast. This finding is at odds with decades of neurophysiological research...

NeuroImage

Fri Nov 01, 2019 21:29

The topographical organization of motor processing: An ALE meta-analysis on six action domains and the relevance of Broca's region

Publication date: Available online 31 October 2019Source: NeuroImageAuthor(s): Giorgio Papitto, Angela D. Friederici, Emiliano ZaccarellaAbstractAction is a cover term used to refer to a large set of motor processes differing in domain specificities (e.g. execution or observation). Here we review neuroimaging evidence on action processing (N = 416; Subjects = 5912) using quantitative Activation Likelihood Estimation (ALE) and Meta-Analytic Connectivity Modeling (MACM) approaches to delineate the...

NeuroImage

Fri Nov 01, 2019 21:29

Vector Flow Imaging of the Ascending Aorta in Patients with Tricuspid and Bicuspid Aortic Valve Stenosis Treated with Biological and Mechanical Implants

Publication date: Available online 31 October 2019Source: Ultrasound in Medicine & BiologyAuthor(s): Kristoffer Lindskov Hansen, Hasse Møller-Sørensen, Jesper Kjaergaard, Jørgen Arendt Jensen, Michael Bachmann NielsenAbstractAortic valve stenosis (AS) is treated with biological prostheses (BPs) and mechanical prostheses (MPs). Vector flow imaging (VFI), an angle-independent ultrasound method, can quantify flow complexity (vector concentration (VC)) and secondary rotation (SR). Ten patients (mean...

ScienceDirect Publication: Ultrasound in Medicine & Biology

Fri Nov 01, 2019 16:12

Differentiation of pilocytic and pilomyxoid astrocytomas using dynamic susceptibility contrast perfusion and diffusion weighted imaging

Abstract Purpose Pilocytic (PA) and pilomyxoid astrocytomas (PMA) are related low-grade tumors which occur predominantly in children. PMAs have a predilection for a supratentorial location in younger children with worse outcomes. However, the two have similar imaging characteristics. Quantitative MR sequences such as dynamic susceptibility contrast (DSC) perfusion and diffusion (DWI) were assessed for significant differences between the...

Neuroradiology

Fri Nov 01, 2019 02:00