Understanding the Fourier transform

The Fourier transform is a mathematical technique that allows an MR signal to be decomposed into a sum of sine waves of different frequencies, phases, and amplitudes. This remarkable result derives from the work of Jean-Baptiste Joseph Fourier (1768-1830), a French mathematician and physicist.  Since spatial encoding in MR imaging involves frequencies and phases, it…

Brain signals, a new biometric identification

Fingerprint scanning, iris scanning, and voice stress analyzer are dated technology compared to the latest form of biometric authentication: the brain’s semantic memory. A team led by postdoctoral researcher Blair Armstrong of the Basque Center for Cognition, Brain, and Language in Spain, observed that the brain signals of 45 participants reading a list of 75…

New BCI might give back the world to locked-in syndrome patients

Researchers have been using brain-computer interfaces (BCIs) to interact with patients suffering from locked-in syndrome for the last decade. What is brand-new is a system created by the Wyss Center for Bio and Neuroengineering in Switzerland that may finally allow even the most paralyzed patients communicate and create a new channel of communication with the outside…

Brain network connectivity behind speech disorder

Research on the hidden patterns of brain activity needed to produce speech is giving scientists fresh insights into what goes wrong in various speech disorders. Speaking is one of the most complex human cognition processes the brain controls. Speech depends on the precise coordination of more than 100 muscles (spread across the mouth, lungs and…

Semantic maps in the human brain

The meaning of language is represented in regions of the cerebral cortex known collectively as the “semantic system”. However, little of the semantic system has been mapped comprehensively, and the semantic selectivity of most regions is still unknown. Here we systematically map semantic selectivity across the cerebral cortex using voxel-wise modeling of fMRI data collected…

Exploring the Art hidden in Pi

Since 2013, scientist and data graphics guru Martin Krzywinski, who is both a scientist and data artist, has been celebrating “Pi Day” by visualizing the outstanding mathematical value in original and fascinating ways. This year, inspired by the recent announcement of the discovery of gravitational waves by LIGO scientists, Martin has dropped a complex new…

ASCII to EDF format converter

The Approach The main goal of this post is to explain how to convert OpenBCI datasets in EDF format files in a simple, easy and straightforward way. Many researchers and programmers have shared their files and software, either on an individual basis or in the framework of a larger group or project. In the name…

Automated eye blink detection online

It is known that EEG data is often corrupted by different types of artifacts. Many efforts have been made to enhance its quality by reducing the artifact. The EEG contains the technical artifacts (noise from the electric power source, amplitude artifact, etc.) and biological artifacts (eye artifacts, ECG and EMG artifacts). This blog post is…

Alpha power battles with toy helicopters

About this project What is more exciting than a brain-controlled helicopter battle against two people? We only need two brains, one OpenBCI board, one Arduino board, two digital potentiometers, and two toy helicopters. Are you ready for this? Components and Supplies Get the hardware We need to indispensable things to “hack” the helicopter tottle: Two…

A newly updated map of the human brain shows almost 100 areas

A newly updated map of the human brain may be the most accurate yet, helping solve over 100 years of arguments and showing nearly 100 areas that hadn’t been reported before. The first hints of the brain’s hidden geography emerged more than 150 years ago. In the 1860s, the physician Pierre Paul Broca was intrigued…

Visualizing the Global Network of Languages

Interactive nodal network diagrams can offer some of the most well-supplied data exploration opportunities in the  world of data graphics. The Macro Connections Group at MIT Media Lab released Global Language Network, an interactive visualization of the relationships among the world’s many languages. This colorful web of information represents an ideal use of the nodal diagram as…

How the Brain Builds Memory Chains

Do you remember the first time you met your college classmate? You were probably nervous, talking a little too loudly and laughing a little too heartily. What else does that memory bring to mind? The lunch you shared later? The other classmates you met that night? Memories bring about memories, and as soon as you…