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BOLD signal BOLD fMRI is often used to measure the hemodynamic response resulting from changes in the oxygenation level in the blood vessels. Yet to be explained is the relationship between neuronal activity and the measured fMRI signal. In a seminal paper,  Ogawa et al., (1990) showed that blood-oxygenation-level-dependent (BOLD) constitutesRead More →

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  Esta imagem é um trabalho derivado de: 1. LadyofHats derivative work: Gabby8228 () [released into the Public domain], via Wikimedia Commons. *AND* 2. Zephyris: at the English language Wikipedia [GFDL (www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/)], via Wikimedia Commons. Este texto está licenciado com uma Licença Creative Commons – Atribuição-CompartilhaIgual 4.0Read More →

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This article is a version of section 1.6 – Chapter 1, of my doctoral thesis, Functional MRI of stimulus interference on auditory processing in normal listeners and tinnitus patients available @ http://hdl.handle.net/10362/14989, (minor wording modifications were applied). Professor Bloch has told you how one can detect the precession of the magneticRead More →

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    http://lisboncisa.fc.ul.pt/     ________________________   Featured image: Coupe de l’encéphale sur le plan médian Author: N. H. Jacob Date: 1834 ca. Description: Coupe de l’encéphale sur le plan médian. Le crâne a été scié verticalement dans toutes sa hauteure sur le plan median, de manière à montrer laRead More →

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Animals are smarter than you think. By Virginia Morell National Geographic, March 2008 In 1977 Irene Pepperberg, a recent graduate of Harvard University, did something very bold. At a time when animals still were considered automatons, she set out to find what was on another creature’s mind by talking toRead More →