Masamichi Ohkura

HOTARU: Automatic sorting system for large scale calcium imaging data

The paper introduces an improved CNMF-based algorithm for calcium imaging data analysis, enhancing cell detection accuracy and signal quality.

Low Computational-cost Cell Detection Method for Calcium Imaging Data

This paper introduces a low computational-cost cell detection method for calcium imaging data, showing it is faster and equally accurate compared to existing methods.

Cellular identity and Ca2+ signaling activity of the non-reproductive GnRH system in the Ciona larva

The paper investigates the cellular identity and calcium signaling activity of gnrh2-expressing cells in Ciona larva, identifying their roles in motor control and neuroendocrine signaling in glia cells.

Fast scanning high optical invariant two-photon microscopy for monitoring a large neural network activity with cellular resolution

The paper introduces FASHIO-2PM, a two-photon microscope that enables fast, aberration-free calcium imaging of large neural networks in awake mice at 7.5 Hz.

Wide and Deep Imaging of Neuronal Activities by a Wearable NeuroImager Reveals Premotor Activity in the Whole Motor Cortex

The paper introduces a wearable neuroimager for whole-brain imaging in mice, revealing premotor activity across the motor cortex.

Dynamic embedding of salience coding in hippocampal spatial maps

The paper investigates how hippocampal CA1 neurons dynamically represent and stabilize spatial maps in mice learning a virtual-reality navigation task, showing that salient experiences like rewards reshape these maps through selective consolidation.

Two-photon calcium imaging of medial prefrontal cortex and hippocampus without cortical invasion

This paper demonstrates two-photon calcium imaging up to 1200 m below the cortical surface in mice, revealing higher reward prediction activity in the prelimbic area compared to the hippocampal CA1 region.