User profiles for Tomohiko Yoshizawa

Tomohiko Yoshizawa (吉澤 知彦)

Hokkaido University
Verified email at den.hokudai.ac.jp
Cited by 66

Reward-predictive neural activities in striatal striosome compartments

T Yoshizawa, M Ito, K Doya - eneuro, 2018 - eneuro.org
The striatum has been shown to play a critical role in reward prediction. It is composed of two
neurochemically and anatomically distinct compartments known as the striosomes and the …

[HTML][HTML] An engineered channelrhodopsin optimized for axon terminal activation and circuit mapping

S Hamada, M Nagase, T Yoshizawa… - Communications …, 2021 - nature.com
Optogenetic tools such as channelrhodopsin-2 (ChR2) enable the manipulation and mapping
of neural circuits. However, ChR2 variants selectively transported down a neuron’s long-…

Neuronal representation of a working memory-based decision strategy in the motor and prefrontal cortico-basal ganglia loops

T Yoshizawa, M Ito, K Doya - eneuro, 2023 - eneuro.org
While animal and human decision strategies are typically explained by model-free and
model-based reinforcement learning (RL), their choice sequences often follow simple procedures …

Conditioned nausea induced by cisplatin and emetine identified by a taste reactivity test in rats

S Su, Z Wei, H Huang, T Yoshizawa, T Inui… - Physiology & …, 2023 - Elsevier
No prior studies have shown that gaping reactions are produced with the avoidance of
conditioned taste caused by cisplatin and emetine. Therefore, we tried to demonstrate it using a …

Effects of methyl methacrylate on the excitability of the area postrema neurons in rats

T Yoshizawa, M Funahashi - Journal of oral biosciences, 2020 - Elsevier
Objectives The aim of the present study is to demonstrate the effects of inhaled methyl
methacrylate (MMA) on the excitability of neurons in the area postrema (AP). We also investigated …

Effects of area postrema lesions and bilateral subdiaphragmatic afferent vagotomy on emetine-induced conditioned taste avoidance in rats.

S Su, M Fujita, Z Wei, H Huang, T Yoshizawa, T Inui… - Physiology & …, 2021 - Elsevier
We investigated the effect of area postrema lesions and selective vagotomy of afferent fibers
on emetine-induced nausea in rats. We evaluated the acquisition of the conditioned taste …

Working memory-based and-free reward prediction in a dual dopamine system in the basal ganglia

T Yoshizawa, Y Miyamura, Y Ochi, R Hira… - bioRxiv, 2023 - biorxiv.org
Animals optimize their actions by predicting and verifying their outcomes (eg, rewards).
Reward prediction often requires working memory (WM)-based information. To elucidate the …

[PDF][PDF] A Physiological Study of the Striatum Based on Reinforcement Learning Models of the Basal Ganglia

T Yoshizawa - 2018 - naist.repo.nii.ac.jp
The reinforcement learning models of the basal ganglia assume that the striatum plays roles
of value functions for reward prediction. In this thesis, I designed rodent’s behavioral tasks …

Microporous dinuclear copper (II) trans-1, 4-cyclohexanedicarboxylate: heterogeneous oxidation catalysis with hydrogen peroxide and X-ray powder structure of …

CN Kato, M Hasegawa, T Sato, A Yoshizawa, T Inoue… - Journal of …, 2005 - Elsevier
A two-dimensional microporous dinuclear copper(II) trans-1,4-cyclohexanedicarboxylate, [Cu
II,II 2 (OOCC 6 H 10 COO) 2 ]⋅H 2 O (1), can act as a heterogeneous catalyst for selective …

Miniaturized machine moving in a pipe using photothermal effect

T Yoshizawa, T Usui, M Yamamoto… - Optomechatronic …, 2002 - spiedigitallibrary.org
Optically driven small machines have such features as easily miniaturized in fabricaiont and
as controlled by optical energy which is supplied in wireless. We reported an optically …