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Synaptic wiring motifs in posterior parietal cortex support decision-making
Excitatory pyramidal neurons preferentially target inhibitory interneurons with the same selectivity and, in turn, inhibitory interneurons preferentially target pyramidal neurons with opposite selectivity, forming an opponent inhibition motif that supports decision-making.
- Aaron T. Kuan
- , Giulio Bondanelli
- & Wei-Chung Allen Lee
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Article
| Open AccessConverting an allocentric goal into an egocentric steering signal
In Drosophila, FC2 neurons signal a navigational goal, which is compared with the fly’s heading by PFL3 neurons to guide moment-to-moment steering.
- Peter Mussells Pires
- , Lingwei Zhang
- & Gaby Maimon
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Article
| Open AccessTransforming a head direction signal into a goal-oriented steering command
Here we show how PFL2 and PFL3 neurons in the Drosophila brain compare a representation of direction with internal spatial goals, both anchored in world-centric coordinates, and produce body-centric steering commands that act to correct deviations from the goal direction.
- Elena A. Westeinde
- , Emily Kellogg
- & Rachel I. Wilson
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Article
| Open AccessFlexible circuit mechanisms for context-dependent song sequencing
Insights into the underlying neuronal circuitry of the Drosophila song production system are provided using song patterning of males near versus far from the female.
- Frederic A. Roemschied
- , Diego A. Pacheco
- & Mala Murthy
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Article
| Open AccessA rise-to-threshold process for a relative-value decision
The Drosophila egg-deposition motor programme is initiated once a rise-to-threshold process hits a threshold, and subthreshold variation in this process regulates the time spent considering options.
- Vikram Vijayan
- , Fei Wang
- & Gaby Maimon
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Article |
Thalamus drives vocal onsets in the zebra finch courtship song
In songbird, thalamus drives a small population of premotor neurons to initiate transitions between song syllables.
- Felix W. Moll
- , Devorah Kranz
- & Michael A. Long
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Article
| Open AccessSynaptic gradients transform object location to action
Analysis of behaviour, physiology, anatomy and connectomics in Drosophila shows how direction-specific visual information is transformed onto downstream premotor networks and converted into appropriate motor responses.
- Mark Dombrovski
- , Martin Y. Peek
- & Gwyneth M. Card
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Article
| Open AccessDopamine promotes head direction plasticity during orienting movements
A study demonstrates that plasticity in the head direction system in Drosophila is modulated by dopamine, which increases learning when reorienting movements are bringing in new spatial information.
- Yvette E. Fisher
- , Michael Marquis
- & Rachel I. Wilson
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Article |
Odour motion sensing enhances navigation of complex plumes
Odour motion contains valuable directional information that is absent from the airflow alone, and Drosophila use this directional information to shape their navigational decisions.
- Nirag Kadakia
- , Mahmut Demir
- & Thierry Emonet
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Muscles that move the retina augment compound eye vision in Drosophila
Drosophila are shown to have retinal muscles that allow them to smoothly track visual motion and also to make rapid eye movements, and the associated functions and mechanisms involved are discussed.
- Lisa M. Fenk
- , Sofia C. Avritzer
- & Gaby Maimon
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Article
| Open AccessFos ensembles encode and shape stable spatial maps in the hippocampus
Fos-expressing hippocampal neurons form highly correlated ensembles that contribute to spatial coding by forming reliable, long-lasting and spatially unbiased maps of an environment.
- Noah L. Pettit
- , Ee-Lynn Yap
- & Christopher D. Harvey
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Article |
The neuronal logic of how internal states control food choice
High-resolution volumetric calcium imaging was used to create a functional atlas of the Drosophila melanogaster ventral brain and identify how and where metabolic and reproductive states alter processing of food-related sensory stimuli.
- Daniel Münch
- , Dennis Goldschmidt
- & Carlos Ribeiro
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Article |
Spatiotemporal dynamics of noradrenaline during learned behaviour
Noradrenaline-expressing neurons in the locus coeruleus in mouse facilitate task execution and encode reinforcement in learning tasks, via partially modular projections to the cortex.
- Vincent Breton-Provencher
- , Gabrielle T. Drummond
- & Mriganka Sur
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Article |
Modulation of inhibitory communication coordinates looking and reaching
During combined looking and reaching movements, neurons in the reach region of the brain can inhibit those in the saccade region to improve coordination.
- Maureen A. Hagan
- & Bijan Pesaran
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Building an allocentric travelling direction signal via vector computation
A neural circuit for implementing a coordinate transformation and 2D vector computation is described in Drosophila.
- Cheng Lyu
- , L. F. Abbott
- & Gaby Maimon
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Transforming representations of movement from body- to world-centric space
Specific neurons in the fan-shaped body of the Drosophila brain convert translational information in relation to the fly’s body to externally referenced coordinates for navigation.
- Jenny Lu
- , Amir H. Behbahani
- & Rachel I. Wilson
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Neural dynamics underlying birdsong practice and performance
In male zebra finches, song practice and courtship song performance are associated with distinct patterns of neural activity in the basal ganglia, resulting in reduced vocal variability during performance.
- Jonnathan Singh Alvarado
- , Jack Goffinet
- & Richard Mooney
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Article |
Cortex-dependent corrections as the tongue reaches for and misses targets
Three-dimensional imaging of the lingual kinematics of mice drinking from a water spout reveals that successful licks have the hallmarks of online motor control, requiring rapid adjustments controlled by anterolateral motor cortex.
- Tejapratap Bollu
- , Brendan S. Ito
- & Jesse H. Goldberg
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Striatal activity topographically reflects cortical activity
Simultaneous mapping of activity across the cortex and dorsal striatum in mice shows that activity in each part of the striatum precisely mirrors that in topographically associated cortical regions, consistently across behavioural contexts.
- Andrew J. Peters
- , Julie M. J. Fabre
- & Matteo Carandini
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Decoding and perturbing decision states in real time
In macaque motor cortex, moment-to-moment fluctuations in neurally derived decision variables are tightly linked to decision state and predict behavioural choices with better accuracy than condition-averaged decision variables or the visual stimulus alone, and can be used to distinguish between different models of decision making.
- Diogo Peixoto
- , Jessica R. Verhein
- & William T. Newsome
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Nearest neighbours reveal fast and slow components of motor learning
A new method for analysing change in high-dimensional data is based on nearest-neighbour statistics and is applied here to song dynamics during vocal learning in zebra finches, but could potentially be applied to other biological and artificial behaviours.
- Sepp Kollmorgen
- , Richard H. R. Hahnloser
- & Valerio Mante
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Article |
Internal state dynamics shape brainwide activity and foraging behaviour
During foraging for live prey, zebrafish larvae alternate between persistent exploitation and exploration behavioural states that correlate with distinct patterns of neuronal activation.
- João C. Marques
- , Meng Li
- & Jennifer M. Li
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Distributed coding of choice, action and engagement across the mouse brain
Recordings from 30,000 neurons in 42 brain regions are used to delineate the spatial distribution of neuronal activity underlying vision, choice, action and behavioural engagement in mice.
- Nicholas A. Steinmetz
- , Peter Zatka-Haas
- & Kenneth D. Harris
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Generation of stable heading representations in diverse visual scenes
Two-photon calcium imaging and optogenetic experiments in tethered flying flies, combined with modelling, demonstrate how the correlation of compass and visual neurons underpins plasticity that enables the transformation of visual cues into stable heading representations.
- Sung Soo Kim
- , Ann M. Hermundstad
- & Vivek Jayaraman
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Speech synthesis from neural decoding of spoken sentences
A neural decoder uses kinematic and sound representations encoded in human cortical activity to synthesize audible sentences, which are readily identified and transcribed by listeners.
- Gopala K. Anumanchipalli
- , Josh Chartier
- & Edward F. Chang
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Letter |
Recalibration of path integration in hippocampal place cells
Evidence from hippocampal place cells shows that path-integration gain, previously thought to be a constant factor in the computation of location, is flexible and can be rapidly fine-tuned.
- Ravikrishnan P. Jayakumar
- , Manu S. Madhav
- & James J. Knierim
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Letter |
A mesocortical dopamine circuit enables the cultural transmission of vocal behaviour
A dopaminergic mesocortical circuit in juvenile zebra finches detects the presence of an adult zebra finch tutor and helps to encode the performance of the tutor, facilitating the cultural transmission of vocal behaviour.
- Masashi Tanaka
- , Fangmiao Sun
- & Richard Mooney
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Letter |
A cortico-cerebellar loop for motor planning
The cerebellum is critical for the coding of future movement in the frontal cortex.
- Zhenyu Gao
- , Courtney Davis
- & Nuo Li
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Letter |
Sensation, movement and learning in the absence of barrel cortex
Mice can learn to detect objects with their whiskers and respond appropriately even in the absence of their primary somatosensory cortex.
- Y. Kate Hong
- , Clay O. Lacefield
- & Randy M. Bruno
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Letter |
Ultra-selective looming detection from radial motion opponency
The discovery of a visual-looming-sensitive neuron, LPLC2, that provides input to the Drosophila escape pathway, and uses dendrites patterned to integrate directionally selective inputs to selectively encode outward motion.
- Nathan C. Klapoetke
- , Aljoscha Nern
- & Gwyneth M. Card
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Letter |
Distinct timescales of population coding across cortex
Calcium imaging data from mice performing a virtual reality auditory decision-making task are used to analyse the population codes in primary auditory and posterior parietal cortex that support choice behaviour.
- Caroline A. Runyan
- , Eugenio Piasini
- & Christopher D. Harvey
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Letter |
A novel mechanism for mechanosensory-based rheotaxis in larval zebrafish
In the absence of visual information, larval zebrafish (Danio rerio) use their mechanosensory lateral line to perform rheotaxis by using flow velocity gradients as navigational cues.
- Pablo Oteiza
- , Iris Odstrcil
- & Florian Engert
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Article |
A retinal code for motion along the gravitational and body axes
Global mapping shows that mouse retinal neurons prefer visual motion produced when the animal moves along two behaviourally relevant axes, allowing the encoding of the animal’s every translation and rotation.
- Shai Sabbah
- , John A. Gemmer
- & David M. Berson
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A neural circuit architecture for angular integration in Drosophila
A neural circuit in Drosophila reveals how the fly’s internal sense of heading rotates when it turns.
- Jonathan Green
- , Atsuko Adachi
- & Gaby Maimon
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Letter |
Dissociated functional significance of decision-related activity in the primate dorsal stream
Activity in regions of the brain have been correlated with decision making but determining whether such relationships are correlative or causative has been challenging; using a technique to reversibly inactivate brain areas in monkeys reveals that although there is decision-related activity in the lateral intraparietal (LIP) area, LIP is not critical for the perceptual decisions studied here.
- Leor N. Katz
- , Jacob L. Yates
- & Alexander C. Huk
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Neural dynamics for landmark orientation and angular path integration
Calcium imaging of the brain of tethered flies walking in a virtual reality arena showed that a population of neurons with dendrites that tile the ‘ellipsoid body’ use information from visual landmarks and the fly's own rotation to compute heading; this suggests insects possess neurons with similarities to ‘head direction cells’ known to contribute to spatial navigation in mammalian brains.
- Johannes D. Seelig
- & Vivek Jayaraman
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A multilevel multimodal circuit enhances action selection in Drosophila
Combining neural manipulation in freely behaving animals, physiological studies and electron microscopy reconstruction in the Drosophila larva identifies a complex multilsensory circuit involved in the selection of larval escape modes that exhibits a multilevel multimodal convergence architecture.
- Tomoko Ohyama
- , Casey M. Schneider-Mizell
- & Marta Zlatic
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Internal models direct dragonfly interception steering
This study tracks dragonfly head and body movements during high-velocity and high-precision prey-capture flights, and shows that the dragonfly uses predictive internal models and reactive control to build an interception trajectory that complies with biomechanical constraints.
- Matteo Mischiati
- , Huai-Ti Lin
- & Anthony Leonardo
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Article |
A synaptic and circuit basis for corollary discharge in the auditory cortex
Here auditory cortex excitatory neurons are shown to decrease their activity during locomotion, grooming and vocalization, and this decrease was paralleled by increased activity in inhibitory interneurons; these findings provide a circuit basis for how self-motion and external sensory signals can be integrated to potentially facilitate hearing.
- David M. Schneider
- , Anders Nelson
- & Richard Mooney
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Presynaptic inhibition of spinal sensory feedback ensures smooth movement
A population of spinal interneurons that form axo–axonic connections with the terminals of proprioceptive afferents are shown to mediate presynaptic inhibition; their ablation elicits harmonic oscillations during goal-directed forelimb movements, which can be modelled as the consequence of an increase in sensory feedback gain.
- Andrew J. P. Fink
- , Katherine R. Croce
- & Eiman Azim
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Letter |
Dynamic sensory cues shape song structure in Drosophila
Drosophila male courtship songs were thought to have a fixed structure with song repetition variations introduced unintentionally because of neural noise; this behavioural assay and computational modelling study instead reveals that males use fast changes in sensory information to actively pattern individual song sequences.
- Philip Coen
- , Jan Clemens
- & Mala Murthy
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Letter |
Sensory–motor transformations for speech occur bilaterally
Direct neural recordings from electrodes over bilateral cortices show that sensory–motor transformations for speech occur bilaterally; neural responses are robust during both perception and production in an overt word-repetition task, and bilateral sensory–motor responses can perform transformations between speech-perception and speech-production representations during a non-word transformation task.
- Gregory B. Cogan
- , Thomas Thesen
- & Bijan Pesaran
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Letter |
Feature detection and orientation tuning in the Drosophila central complex
Two-photon calcium imaging experiments reveal that ring neurons in the Drosophila central complex represent visual features and show direction-selective orientation tuning, resembling simple cells in mammalian primary visual cortex; future fly studies may enhance our understanding of circuit computations underlying visually guided action selection.
- Johannes D. Seelig
- & Vivek Jayaraman
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Letter |
Stepwise acquisition of vocal combinatorial capacity in songbirds and human infants
In two species of songbirds and in pre-lingual human infants, vocal transitions across syllables are acquired slowly, one by one, indicating that combinatorial ability is not the starting point of vocal development but a laboriously achieved end point.
- Dina Lipkind
- , Gary F. Marcus
- & Ofer Tchernichovski
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Article |
Hierarchy of orofacial rhythms revealed through whisking and breathing
Motor patterns underlying the rodent exploratory behaviours whisking and sniffing are coordinated by respiratory centres in the ventral medulla; a distinct region in the ventral medulla provides rhythmic input to the facial motor neurons that drive scanning by the vibrissae, and input from the pre-Bötzinger complex coordinates whisking with sniffing and basal breathing.
- Jeffrey D. Moore
- , Martin Deschênes
- & David Kleinfeld
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Elemental gesture dynamics are encoded by song premotor cortical neurons
The auditory response of song premotor HVC neurons in sleeping birds, and HVC activity in singing birds, is synchronized with particular moments of vocal motor movements as defined by a dynamical systems model of song production; this HVC activity could be used as a ‘forward’ model to predict behaviour and evaluate feedback.
- Ana Amador
- , Yonatan Sanz Perl
- & Daniel Margoliash
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Nonlinear dendritic processing determines angular tuning of barrel cortex neurons in vivo
In vivo whole-cell recordings combined with an intracellular N-methyl-d-aspartate receptor (NMDAR) blocker and membrane hyperpolarization are used to examine the contribution of dendritic NMDAR-dependent regenerative responses to the angular tuning of layer 4 neurons; the results show that active dendritic processing sharpens the sensory responses of cortical neurons in vivo.
- Maria Lavzin
- , Sophia Rapoport
- & Jackie Schiller
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A subset of dopamine neurons signals reward for odour memory in Drosophila
A group of dopamine neurons that are distinct from those mediating aversive reinforcement is found to signal sugar reward in the fly brain, highlighting the evolutionarily conserved function of dopamine neurons in reward processing.
- Chang Liu
- , Pierre-Yves Plaçais
- & Hiromu Tanimoto
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News |
Finches learn even when practice isn't perfect
Covert skill-development in songbirds challenges brain model.
- Mo Costandi