Geometry and the visual brain.

Consideration of Individual Brain Geometry and Anisotropy on the Effect of tDCS

Introduction: The response variability between subjects, which is one of the fundamental challenges facing transcranial direct current stimulation (tDCS), can be investigated by understanding how the current is distributed through the brain. This understanding can be obtained by means of computational methods utilizing finite element (FE) models. Materials and Methods: In this study, the effect...

Assessing users' visual perception based on the regular and irregular geometry of space organizer

Perception is a cognitive process depends on various factors of the environment. The user's mentality can affect his perception, understanding, and behavior in the environment. Organizing the environment is one of the important factors in the formation of spatial communication of elements that can be an important factor in understanding the person from his or her surroundings. In this research,...

Editorial: Brain Extracellular Space: Geometry, Matrix and Physiological Importance

Design and performance evaluation of spheroid geometry for brain PET scanner using Monte Carlo modeling

Introduction: There has been a curiosity about the spheroid geometry for PET scanners developments since several years ago, therefore in this study, we are aiming to evaluate the performance of this geometry and compare its performance with cylindrical geometry using Monte Carlo simulation. Methods: We simulated a spheroid geometry with a radius of 199 mm...

سازمان ادراکی و انسجام مرکزی حین پردازش‌های دیداری در کودکان اُتیسم: شواهدی برای از هم گسیختگی ارتباطات کارکردی در مغز اُتیستیک

Objective: A variety of evidence demonstrate altered perceptual functioning during visual processing in the brain of children with autism.it possibly is related to or the cause other diagnostic symptom in autism spectrum. In the present study visual perceptual organization in autistic children is studied. These processes require central coherence and typical functional connectivity among neural...

The effect of incorporating the quantitative analysis besides visual assessments of 18F-FDG brain PET images for the localization of epileptogenic zones

Introduction: FDG Brain PET is a valuable paraclinical tool for presurgical assessments of patients suffering from refractory epilepsy. By the widespread accessibility of PET, recognizing the functional lesions has become a current practical method especially in preoperative evaluations of the partial epilepsy disorders. The aim of our study was to assess the impact of quantit...