Results 21 to 30 of about 154,642 (204)

Activity dependent feedback inhibition may maintain head direction signals in mouse presubiculum

open access: yesNature Communications, 2017
Head direction is encoded by cells in the presubiculum, but the role of local circuitry in head direction encoding remains unknown. Here the authors demonstrate how a specific inhibitory neuron type, the Martinotti cell, together with excitatory ...
Jean Simonnet   +7 more
doaj   +1 more source

Why Isn’t the Head Direction System Necessary for Direction? Lessons From the Lateral Mammillary Nuclei

open access: yesFrontiers in Neural Circuits, 2019
Complex spatial representations in the hippocampal formation and related cortical areas require input from the head direction system. However, a recurrent finding is that behavior apparently supported by these spatial representations does not appear to ...
Christopher M. Dillingham   +1 more
doaj   +1 more source

Tiltable objective microscope visualizes selectivity for head motion direction and dynamics in zebrafish vestibular system

open access: yesNature Communications, 2022
Signals about head orientation and movement in the vestibular periphery are fundamental to the sense of balance and motion, but difficult to measure systematically during head motion.
Masashi Tanimoto   +2 more
doaj   +1 more source

Cognitive Mapping Based on Conjunctive Representations of Space and Movement

open access: yesFrontiers in Neurorobotics, 2017
It is a challenge to build robust simultaneous localization and mapping (SLAM) system in dynamical large-scale environments. Inspired by recent findings in the entorhinal–hippocampal neuronal circuits, we propose a cognitive mapping model that includes ...
Taiping Zeng, Taiping Zeng, Bailu Si
doaj   +1 more source

Angular and linear speed cells in the parahippocampal circuits

open access: yesNature Communications, 2022
It remains unclear how the hippocampal region integrates position and self-motion information to update spatial representations. Here, the authors report grid and head direction cells as well as cells encoding self-motion parameters such as angular head ...
Davide Spalla   +2 more
doaj   +1 more source

Reverse Engineering and Robotics as Tools for Analyzing Neural Circuits

open access: yesFrontiers in Neurorobotics, 2021
Understanding neuronal circuits that have evolved over millions of years to control adaptive behavior may provide us with alternative solutions to problems in robotics.
Ioannis Pisokas
doaj   +1 more source

Path integration of head direction: updating a packet of neural activity at the correct speed using axonal conduction delays. [PDF]

open access: yesPLoS ONE, 2013
The head direction cell system is capable of accurately updating its current representation of head direction in the absence of visual input. This is known as the path integration of head direction.
Daniel Walters   +2 more
doaj   +1 more source

The vestibular contribution to the head direction cells signal and navigation

open access: yesFrontiers in Integrative Neuroscience, 2014
Spatial learning and navigation depend on neural representations of location and direction within the environment. These representations, encoded by place cells and head direction cells, respectively, are dominantly controlled by visual cues, but ...
Jeffrey S Taube, Ryan M. Yoder
doaj   +1 more source

Therapeutic Apheresis in Nigeria: A Multi‐Center Summary of Abstracts From the Inaugural Nigerian Society for Apheresis Scientific Meeting

open access: yesTherapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Therapeutic apheresis (TA) is an established treatment modality for hematologic, neurologic, and immunologic disorders, yet access remains severely limited in sub‐Saharan Africa. Donor apheresis, including platelet apheresis collection from healthy donors, represents an important complementary modality supporting blood product ...
Nosa Bazuaye   +33 more
wiley   +1 more source

From junk to function — How weak selection in eukaryotes builds new parts and drives genomic complexity

open access: yesFEBS Letters, EarlyView.
How do genomes gain new functional parts? In eukaryotes, which tend to evolve under weak selection, much of the genome is junk. Palazzo and Qiu borrow the logic of Markov chains to show how non‐functional DNA becomes functional through the appearance of intermediate states, which arise due to epistasis, buffering, and biochemical messiness, allowing ...
Alexander F. Palazzo, Yi Qiu
wiley   +1 more source

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