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Showing 1–14 of 14 results
Advanced filters: Author: Nachum Ulanovsky Clear advanced filters

  • Although we understand much about mechanisms of spatial navigation in the mammalian brain in the context of laboratory investigations, our knowledge of the neural bases of 'real-world' navigation is more limited. Ulanovsky and colleagues here describe how we can approach this problem through experimental research and theoretical models of large-scale navigation in bats and rats.

    • Maya Geva-Sagiv
    • Liora Las
    • Nachum Ulanovsky
    Reviews
    Nature Reviews Neuroscience
    Volume: 16, P: 94-108

  • During rapid behavioural switches in flying bats, hippocampal neurons can rapidly switch their core computation to represent the relevant behavioural variables, supporting behavioural flexibility.

    • Ayelet Sarel
    • Shaked Palgi
    • Nachum Ulanovsky
    ResearchOpen Access
    Nature
    Volume: 609, P: 119-127

    • Michael M. Yartsev
    • Menno P. Witter
    • Nachum Ulanovsky
    Research
    Nature
    Volume: 488, P: E2

  • A study of freely moving bats provides new insights into how the brain encodes a three-dimensional neural compass; neurons were identified encoding the three Euler rotation angles of the head (azimuth, pitch, and roll) and recordings from these head-direction cells revealed a toroidal model of spatial orientation mapped out by cells tuned to two circular variables (azimuth × pitch).

    • Arseny Finkelstein
    • Dori Derdikman
    • Nachum Ulanovsky
    Research
    Nature
    Volume: 517, P: 159-164

  • Bats, the only flying mammals, comprise almost 25% of mammalian species. They are excellent navigators, highly social, and extremely long-lived. Their sense of echolocation has been studied for many years — but many species possess also excellent vision and olfaction. In recent years, bats have emerged as new models for neurobiology of navigation, social neuroscience, aging, and immunity.

    • Liora Las
    • Nachum Ulanovsky
    News
    Nature Methods
    Volume: 21, P: 1135-1137

  • In bat CA1, the authors found contextual time cells encoding spatial context and time, another population purely encoding elapsed time and social time cells encoding sequences aligned to another bat’s landing in a social imitation task.

    • David B. Omer
    • Liora Las
    • Nachum Ulanovsky
    Research
    Nature Neuroscience
    Volume: 26, P: 285-294

  • Recordings from the brains of freely flying bats show that grid cells that represent 3D space have multiple firing fields and are organized with local rather than global order.

    • Gily Ginosar
    • Johnatan Aljadeff
    • Nachum Ulanovsky
    Research
    Nature
    Volume: 596, P: 404-409

  • Hippocampal place cells encode the animal’s position within the environment. Using flying bats navigating either by vision or echolocation, the authors found that hippocampal spatial maps changed completely between vision and echolocation. This suggests the hippocampus does not contain a single abstract map for a given environment, but rather multiple maps for different sensory modalities.

    • Maya Geva-Sagiv
    • Sandro Romani
    • Nachum Ulanovsky
    Research
    Nature Neuroscience
    Volume: 19, P: 952-958

  • Multidimensional stimuli are often represented by neurons encoding only a single dimension and those encoding multiple dimensions. Here, the authors present theoretical and experimental analyses to show that mixed representations are optimal to efficiently encode such stimuli under different behavioral modes.

    • Arseny Finkelstein
    • Nachum Ulanovsky
    • Johnatan Aljadeff
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-17