![]() Images from fMRI will often show a whole neural pathway active all at once, when really, there’s a neural signal propagating from one part of the pathway to the next. Changes in blood flow occur over seconds-far slower than the millisecond timescale of neuronal signals. ![]() But the technique’s temporal resolution is less impressive. But provided it can be replicated in other labs, the method could represent a “major advance” in brain imaging, he says.īOLD fMRI can pinpoint activity to a millimeter or less of brain tissue. The technique, which its creators call “direct imaging of neuronal activity” (DIANA), uses existing magnetic resonance imaging (MRI) technology to take series of quickfire, partial images, and then combines those images to create a high-resolution picture of which bits of the brain are active when.ĭIANA has so far only been tested in anesthetized mice, and the mechanisms underlying it aren’t entirely clear, notes Matthew Self, a neuroscientist at the Netherlands Institute for Neuroscience who wasn’t involved in the work. TOI ET AL., SCIENCE, 2022.Ī new approach to magnetic resonance imaging could allow neuroscientists to noninvasively track the propagation of brain signals on millisecond timescales, according to a study published yesterday (October 13) in Science. ABOVE: Images taken at 5 millisecond intervals (running in rows from top left to bottom right) show the propagation of signals in an anesthetized mouse's brain-in this case, in response to a light being shone in the mouse's eye. ![]()
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |