Hanako Hagio

This study compares brain structures of tool-using wrasses with other teleosts, finding enlarged fiber tracts in tool-users that may support higher cognitive functions, contrasting with amniotes.

The paper demonstrates the use of microbial rhodopsins and adenylyl cyclases to control second messengers in zebrafish neurons and cardiomyocytes, revealing their roles in locomotion and cardiac function.

The paper develops optogenetic tools using animal G protein-coupled bistable rhodopsins to control Gq and Gi/o signaling in neurons and cardiomyocytes, showing their utility in vivo.

The paper investigates the developmental origin of a visual relay nucleus in zebrafish, finding it arises from the midbrain rather than the forebrain, suggesting non-thalamic evolution of visual pathways.