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Die Netzhaut des Auges ändert ihre „Sprache“ mit wechselnder Helligkeit

By Guest PostDecember 11, 2014Scienceai research, devang khakhar, ersten eindruck, fetal pulmonary disorders, froesche, gesichterforschung, haushaltsentwurf, jason gleghorn, mei fong pang, nature neuroscience, optogenetics, pulmonary hypoplasia, rate of development, signalsystem, universitaet tuebingen

Studie der Universität Tübingen zeigt, wie differenziert Sehinformationen ans Gehirn geleitet werden ‒ Erkenntnisse könnten helfen, Kameras wie auch Sehprothesen weiter zu entwickeln

Unser Sehvermögen ist ausgezeichnet: Es funktioniert auch unter extremen Bedingungen, vom Spaziergang unterm Sternenhimmel bis zur Ski-Abfahrt im gleißenden Sonnenlicht ‒ und dies weitaus geschmeidiger und stabiler, als selbst modernste Digitalkameras arbeiten. Wissenschaftlern war bekannt, dass die ersten Schritte der „Bildverarbeitung“ bereits innerhalb des Auges ablaufen: die Netzhaut enthält nicht nur die lichtempfindlichen Sinneszellen, sondern sie bereitet Informationen auch auf und leitet diese als komplexes Aktivitätsmuster über den Sehnerv an das Gehirn weiter. (more…)

Subconscious mental categories help brain sort through everyday experiences

By Guest PostMay 2, 2013Health, Scienceanna schapiro, brain, brown university, chopping vegetables, computational model, dynamic, experiences, functional, magnetic resonance imaging, matthew botvinick, michael frank, natalia cordova, nature neuroscience, neural populations, nicholas turk browne, princeton university, similarity structure, subconscious mental, temporal relationship, timothy rogers

Your brain knows it’s time to cook when the stove is on, and the food and pots are out. When you rush away to calm a crying child, though, cooking is over and it’s time to be a parent. Your brain processes and responds to these occurrences as distinct, unrelated events.

But it remains unclear exactly how the brain breaks such experiences into “events,” or the related groups that help us mentally organize the day’s many situations. A dominant concept of event-perception known as prediction error says that our brain draws a line between the end of one event and the start of another when things take an unexpected turn (such as a suddenly distraught child). (more…)

Brain’s Map of Space Falls Flat When It Comes to Altitude

By Guest PostAugust 8, 2011Scienceanimal brain, brain, brain map of space, complex environments, grid cells, hippocampus, hotspots, kate jeffery, map of space, nature neuroscience, neurons, place cells, Space, third dimension, ucl psychology and language sciences, wellcome trust

Animal’s brains are only roughly aware of how high-up they are in space, meaning that in terms of altitude the brain’s ‘map’ of space is surprisingly flat, according to new research.

In a study published online in Nature Neuroscience, scientists studied cells in or near a part of the brain called the hippocampus, which forms the brain’s map of space, to see whether they were activated when rats climbed upwards. (more…)

Tag Archives: nature neuroscience

Die Netzhaut des Auges ändert ihre „Sprache“ mit wechselnder Helligkeit

Subconscious mental categories help brain sort through everyday experiences

Brain’s Map of Space Falls Flat When It Comes to Altitude