A Neural Network for Wind-Guided Compass Navigation

Neuron, Год журнала: 2020, Номер 107(5), С. 924 - 940.e18

Опубликована: Июль 17, 2020

Spatial maps in the brain are most accurate when they linked to external sensory cues. Here, we show that compass Drosophila is direction of wind. Shifting wind rightward rotates as if fly were turning leftward, and vice versa. We describe mechanisms several computations integrate information into compass. First, an intensity-invariant representation computed by comparing left-right mechanosensory signals. Then, signals reformatted reduce coding biases inherent peripheral mechanics, cues brought same circular coordinate system represents visual self-motion Because incorporates both cues, it should enable navigation under conditions where no single cue consistently reliable. These results how local can be transformed a global, multimodal, abstract space.

Язык: Английский

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Morning and Evening Circadian Pacemakers Independently Drive Premotor Centers via a Specific Dopamine Relay

Neuron, Год журнала: 2019, Номер 102(4), С. 843 - 857.e4

Опубликована: Апрель 10, 2019

Язык: Английский

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Mechanisms Underlying the Neural Computation of Head Direction

Annual Review of Neuroscience, Год журнала: 2019, Номер 43(1), С. 31 - 54

Опубликована: Дек. 24, 2019

Many animals use an internal sense of direction to guide their movements through the world. Neurons selective head are thought support this directional and have been found in a diverse range species, from insects primates, highlighting evolutionary importance. Across most head-direction networks share four key properties: unique representation at all times, persistent activity absence movement, integration angular velocity update representation, cues correct drift. The dynamics theorized network structures called ring attractors elegantly account for these properties, but relationship brain circuits is unclear. Here, we review experiments rodents flies that offer insights into potential neural implementations attractor networks. We suggest theory-guided search across model systems biological mechanisms enable such would uncover general principles underlying circuit function.

Язык: Английский

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The Transition to Minimal Consciousness through the Evolution of Associative Learning

Frontiers in Psychology, Год журнала: 2016, Номер 7

Опубликована: Дек. 22, 2016

The minimal state of consciousness is sentience. This includes any phenomenal sensory experience – exteroceptive, such as vision and olfaction; interoceptive, pain hunger; or proprioceptive, the sense bodily position movement. We propose unlimited associative learning (UAL) marker evolutionary transition to (or sentience), its phylogenetically earliest sustainable manifestation driver evolution. define describe UAL at behavioral functional level argue that structural-anatomical implementations this mode in different taxa entail subjective feelings (sentience). end with a discussion implications our proposal for distribution animal kingdom, suggesting testable predictions, revisiting ongoing debate about function light approach.

Язык: Английский

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Brain composition inHeliconiusbutterflies, posteclosion growth and experience‐dependent neuropil plasticity

The Journal of Comparative Neurology, Год журнала: 2016, Номер 524(9), С. 1747 - 1769

Опубликована: Фев. 26, 2016

Behavioral and sensory adaptations are often reflected in the differential expansion of brain components. These volumetric differences represent changes cell number, size, and/or connectivity, which may denote functional evolutionary relationships between different regions, composition behavioral ecology. Here we describe two species Heliconius butterflies, a long‐standing study system for investigating ecological adaptation speciation. We confirm previous report striking mushroom body, explore patterns posteclosion experience‐dependent plasticity regions. This analysis uncovers age‐ body growth comparable to that foraging Hymenoptera, but also identifies several other neuropils. An interspecific indicates display remarkably large investment bodies lepidopteran, indeed rank highly compared insects. Our analyses lay foundation future comparative experimental will establish as valuable case neurobiology. J. Comp. Neurol. 524:1747–1769, 2016. © 2016 Wiley Periodicals, Inc.

Язык: Английский

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