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Neurobiology Lab
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The lab studies how signals travel along the axons of neurons in the brain, using both experiments and computation.
AboutAbout the lab
Reading axonal signals through recording and computation
The Neurobiology Lab studies how axons, which extend from neurons in the brain, transmit signals.
The axon is the part of a neuron that generates electrical signals called action potentials and carries them to the junction with the next neuron.
The lab records electrical signals directly from axon terminals called mossy fibers in the mouse hippocampus and examines how they change.
In addition to patch clamp, fluorescence imaging, and optical stimulation, the lab uses computer simulations to check experimental results quantitatively.
Key terms
- Action potential
- A brief, large electrical signal generated when a neuron is excited. It travels along the axon to carry information.
- Mossy fiber
- An axon in the hippocampus. It is the best-studied among axons of the central nervous system.
- Potassium channel
- A passage in the cell membrane that lets potassium ions through. It determines the shape and duration of electrical signals.
ResearchResearch themes
The lab studies how information is transmitted in the central nervous system, aiming to understand how the brain works by building up from its components. Using mouse hippocampal slice preparations, it examines how axons in the central nervous system function through direct recordings from axon terminals.
*Illustrative imageMechanisms of ectopic bursts triggered by stimulation
Repeated strong stimulation can cause continuous firing to arise at a site in the axon different from the usual one. Using simulations of hippocampal mossy fibers, the lab showed that slight depolarization and the inactivation of potassium channels promote this.
*Illustrative imageFiring triggered by blocking potassium channels
Adding a drug that blocks potassium channels to hippocampal slices induces continuous firing. Using direct recordings from mossy fiber terminals and mathematical simulations, the lab showed that this firing is thought to arise in a distal part of the axon.
*Illustrative imagePotassium channels and short-term synaptic plasticity
Potassium channels in axons of the brain inactivate when stimulation continues. Simulations showed that this property contributes to the large enhancement of synaptic transmission during repeated stimulation.
MembersFaculty
The members of the Neurobiology Lab consist of faculty, doctoral and master's students, and secretaries.As of 2026
- ProfessorHaruyuki Kamiya
- Project Assistant ProfessorShunsuke Ohura
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Hippocampus mossy fiber interneuron” National Institutes of Health (NIH) / Public domain (cropped)
- Mechanisms of ectopic bursts triggered by stimulation: “Warholian Hippocampi” AlmudenaFM / CC BY-SA 4.0 (cropped)
- Firing triggered by blocking potassium channels: “2A79 viewed from outside” Long, S.B.,Campbell, E.B.,MacKinnon, R. / CC0 (cropped)
- Potassium channels and short-term synaptic plasticity: “Protein KCNA4 PDB 1kn7” Emw / CC BY-SA 3.0 (cropped)
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