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Reconstructing visual experiences from brain activity evoked by natural movies - GallantLabUCB

Reconstructing visual experiences from brain activity evoked by natural movies - GallantLabUCB

Related:  VisionNeuroscience

Video Reconstruction of Visual Memory Ever dreamed of recording your dreams and turning them into a video clip? The technology that enables you to do that is near: UC Berkeley scientists figured out a way to turn the way our brains interpret visual stimuli into a video, and the result is amazing. To be able to do this, the researches used functional Magnetic Resonance Imaging (fMRI) to measure the blood flow through brain's visual cortex. Then, different parts of the brain were divided into volumetric pixels or voxels (the term might be familiar to those who remember early 3D games which were based on voxels instead of polygons which are more commonly used today). Finally, the scientists built a computational model which describes how visual information is mapped into brain activity.

Declassified Government Documents Declassified Government Documents About Declassified Documents | Security Classification | Guides | FOIA Information | Collections at UC Berkeley | Internet Collections and Indexes | Presidential Libraries About Declassified Documents Documents may be classified for many reasons - issues of national security or privacy. Brainwave entrainment Brainwave Entrainment is any practice that aims to cause brainwave frequencies to fall into step with a periodic stimulus having a frequency corresponding to the intended brain-state (for example, to induce sleep), usually attempted with the use of specialized software. It purportedly depends upon a "frequency following" response on the assumption that the human brain has a tendency to change its dominant EEG frequency towards the frequency of a dominant external stimulus.[citation needed] Such a stimulus is often aural, as in the case of binaural or monaural beats and isochronic tones, or else visual, as with a dreamachine, a combination of the two with a mind machine, or even electromagnetic radiation. Hemispheric Synchronization, a potential and generally desired result of brainwave entrainment, refers to a state when the brainwave pattern of the right and left hemispheres become alike.

Clearing the Mind: How the Brain Cuts the Clutter Newly discovered neurons in the front of the brain act as the bouncers at the doors of the senses, letting in only the most important of the trillions of signals our bodies receive. Problems with these neurons could be the source of some symptoms of diseases like attention deficit disorder and schizophrenia. "The brain doesn't have enough capacity to process all the information that is coming into your senses," said study researcher Julio Martinez-Trujillo, of McGill University in Montreal. "We found that there are some cells, some neurons in the prefrontal cortex, which have the ability to suppress the information that you aren't interested in. They are like filters."

Visual Processing: Eye and Retina (Section 2, Chapter 14) Neuroscience Online: An Electronic Textbook for the Neurosciences In this chapter you will learn about how the visual system initiates the processing of external stimuli. The chapter will familiarize you with measures of visual sensation by discussing the basis of form perception, visual acuity, visual field representation, binocular fusion, and depth perception. An important aspect is the regional differences in our visual perception: the central visual field is color-sensitive, has high acuity vision, operates at high levels of illumination whereas the periphery is more sensitive at low levels of illumination, is relatively color insensitive, and has poor visual acuity. You will learn that the image is first projected onto a flattened sheet of photoreceptor cells that lie on the inner surface of the eye (retina). The information gathered by millions of receptor cells is projected next onto millions of bipolar cells, which, in turn, send projects to retinal ganglion cells.

Brain Stimulation May Induce the Human Will to Persevere - Wired Science The salience network, highlighted here in two epilepsy patients, is thought to mediate our response to important internal or external signals, such as pain or the sound of a siren. Image: Parvizi et al. Neuron 2013 One epilepsy patient reported a flushing in his chest and described a feeling of determinedness, like getting ready to drive through a storm. A second reported similar feelings, a response scientists involved in the study called “the will to persevere.”

University of California Coordinates: The University of California (UC) is a public university system in the U.S. state of California. Under the California Master Plan for Higher Education, the University of California is a part of the state's three-tier public higher education system, which also includes the California State University system and the California Community Colleges System. As of fall 2011, the University of California has 10 campuses, a combined student body of 234,464 students, 18,896 faculty members, 189,116 staff members, and over 1,600,000 living alumni.[2] Its first campus, UC Berkeley, was founded in 1868, while its tenth and newest campus, UC Merced, opened for classes in fall 2005.

Antoine Lutz's Homepage I am currently an associate scientist at the Waisman Lab for Brain Imaging & Behavior at the University of Wisconsin-Madison. I am doing my research in collaboration with Prof. R. J. Davidson and several researchers from his lab. Contact: Waisman Laboratory for Brain Imaging & Behavior University of Wisconsin-Madison 1500 Highland Avenue Madison, WI 53703-2280 (tel) (1).608.262.8705 (fax) (1).608.262.9440