Yonehara Group


Yonehara group - Structure, function and development of neural circuits in visual system


The Yonehara group investigates the structure, function and development of neural circuits in the visual system. We are interested in the role of different cell types in neuronal circuits and the genetic and molecular mechanisms of how those circuits are assembled during development. The methods used include two-photon imaging, electrophysiology, optogenetics, trans-synaptic virus, genetic labeling, molecular biology, genomics and behavioral analysis.

Research focus


Our research is based on the central hypothesis that functionally important neuronal circuit motifs are repeatedly used across various brain regions and species, and therefore identifying and understanding the structure and function of such motifs could give insights into the functional organisation of the brain. The mouse visual motion circuits, particularly the retina and its direct brain target the superior colliculus, provides us with an approachable substrate to work towards this goal, given its functionally and genetically well-defined cell types, multi-layered organization and tractable visually-guided behaviors. Two key organising principles that characterize not only the visual motion circuits of mammals and insects, but also other neuronal systems, are 1) parallel processing and 2) asymmetry of neuronal connectivity. We have focused, and will continue to focus, on questions relevant to these organising principles (Yonehara et al., Nature, 2011; Yonehara et al., Neuron, 2013).

The research plan is firstly to identify a computation performed by a given neuronal circuit comprising distinct cell types in the adult brain. Secondly, to investigate how the computation is performed by linking the activity and synaptic connectivity of individual cell types in the circuit to the computation that the circuit achieves. Thirdly, to examine the role of individual cell types in transforming the sensory input into output innate behavior or eye movement control. Finally, to study the genetic mechanisms by which the elementary circuit motifs are assembled, and how its dysfunction can result in disease. Ultimately, by these experiments we aim to link genes to behavior. We will also develop new genetic and viral technologies that facilitate probing circuit function in healthy and diseased systems.

Available projects

The Yonehara group currently has projects available for Postdocs, Master and PhD students. Please contact Group Leader Keisuke Yonehara directly, if interested. See current job announcements here

Left picture: Retinal ganglion cell circuits labeled with trans-synaptic rabies virus (magenta) in a transgenic mouse line in which single type of motion-sensitive ganglion cells is labeled with GFP (green). Right picture: Two-photon image (top view) of GCaMP3-expressing bipolar cell axon terminals and ON DS cell dendrites shown as a heat map (Yonehara et al., Neuron, 2013). Regions of interest are marked by colored lines.

News

2017.10.09 | People

Akihiro Matsumoto is new postdoc in Yonehara Group

Akihiro Matsumoto is new postdoc in Keisuke Yonehara's group from October 1st. He will investigate the circuit basis for visual processing in the retina. Using a combination of electrophysiological recordings, such as whole-cell recordings and multi-electrode array recordings, two-photon imaging and statistical analysis. He…

2017.07.13 | People

Monica Dahlstrup Sietam is new Research Assistant in Yonehara Group

Monica is new Research Assistant in Keisuke Yonehara's group per July 1st. She will study the role of Cre-labeled ganglion cell types in vision-dependent behaviors and central computations using molecular biological, genome engineering, behavioral and electrophysiological approaches.

2017.05.16 | People

Yutaka Shimizu is new postdoc in Yonehara Group

Yutaka started in Keisuke's group per May 15th. He is interested in the molecular mechanism underlying functional motion-sensitive neural network in the retina. He is aiming at elucidating it by combining mouse genetics, molecular biology, behavioral analysis and electrophysiology.

2016.12.06 | Research news

Article by Keisuke Yonehara awarded "Best of Neuron 2016"

Keisuke Yonehara et. al.'s "Congenital Nystagmus Gene FRMD7 Is Necessary for Establishing a Neuronal Circuit Asymmetry for Direction Selectivity" is selected among the best articles in Neuron 2016.

2016.10.03 | Awards

Group Leader Keisuke Yonehara received Swiss OphthAward

Group Leader Keisuke Yonehara, together with Michele Fiscella and Antonia Drinnenberg, received Swiss OphthAward in the category "Best Experimental Work" for his outstanding publication "Congenital Nystagmus Gene FRMD7 Is Necessary for Establishing a Neuronal Circuit Asymmetry for Direction Selectivity".

2016.05.23 | Awards

Group Leader Keisuke Yonehara appointed the first AIAS Associate

AIAS bids its welcome to Keisuke Yonehara from DANDRITE, Aarhus University who is now officially affiliated with AIAS. The new ‘AIAS Associates’ has been established as a means to provide Aarhus University internationals at a high-level with a formal access and link to the international environment at AIAS.

2015.12.18 | Research news

New publication from Keisuke Yonehara's group - Congenital nystagmus gene FRMD7 is necessary for establishing a neuronal circuit asymmetry for direction selectivity

Neuronal circuit asymmetries are important components of brain circuits, but the molecular pathways leading to their establishment remain unknown. Here we found that the mutation of FRMD7, a gene which is defective in human congenital nystagmus, leads to the selective loss of the horizontal optokinetic reflex in mice, as it does in humans. This is…

2015.12.08 | Awards

Keisuke Yonehara receives grant from the Novo Nordisk Foundation

Group Leader Keisuke Yonehara has been awarded a 2 year project grant of 1.2 mio. DKK from the Novo Nordisk Foundation, Medical and Natural Sciences Research, to support his research on function and dysfunction of optokinetic circuits in mice.

DANDRITE Group Leader Keisuke Yonehara

2015.07.31 | Awards

Group Leader Keisuke Yonehara awarded the Japan Neuroscience Society Young Investigator Award

The Japan Neuroscience Society has awarded one of the five Young Investigator Awards-Fiscal Year 2015 to DANDRITE Group Leader Keisuke Yonehara for his research on the function and development of motion-sensitive circuits in the visual system. The ceremony was held in Kobe, Japan at the end of July during the 38th Annual Meeting of the Japan…

(Copyright: Colourbox)
Sadegh Nabavi (Photo: private)
Mark Denham (Photo: private)
Anne von Philipsborn (Photo: DANDRITE)
Duda Kvitsiani (Photo: DANDRITE)
Keisuke Yonehara (Photo: DANDRITE)

2015.05.29 | People

Top team of Group leaders now complete at DANDRITE

DANDRITE’s aim of appointing five top researchers as Group leaders has just become a reality with the appointment of Dr Sadegh Nabavi, whose research includes how memory is formed, how it can be erased, and how it can subsequently be restored.

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