The Hige Lab | Drosophila Neurophysiology

The

Hige Lab

From synaptic plasticity to behavior

UNC-Chapel Hill

Research

How do animals make appropriate action selections based on their past experience and the current situation?

We use the small, simple brains of fruit flies to draw out general circuit principles that underlie this process. We combine multiple physiological techniques to study synapses, circuits and behavior.

Our mission

Animals show different behavioral responses to the same sensory input depending on their past experience or current context. How does the brain enable such flexibility? Our goal is to understand the mechanisms of this process at the levels of synaptic plasticity, neural circuit and behavior. Our lab uses the fruit fly, Drosophila melanogaster, as a model organism. We employ multiple physiological techniques including in vivo whole-cell patch-clamp recording, two-photon calcium imaging and behavior assays. Previously, we demonstrated the long-term synaptic plasticity that underlies associative olfactory learning in this system (Hige et al., 2015, Neuron). We ask how these synaptic changes are integrated by the circuit and ultimately alter the animal’s action selection. We also address molecular basis of synaptic plasticity by using genetic tools.

Why flies?

The Drosophila’s brain consists of 100,000 neurons, 1000 times less than the mouse’s. Nonetheless, some of the important circuit motifs are conserved between these animals both in sensory circuits and higher-order brain areas. With this small brain, flies indeed exhibit a range of sophisticated adaptive behaviors. Furthermore, genetic tools that label a specific cell type of neurons are becoming available in nearly every brain area. This allows us to record from a particular neuron reproducibly in different animals as well as to manipulate the activity of as small as a single pair of neurons in behaving animals. Finally, the whole-brain connectome data is becoming available. Overall, the compact architecture of the brain together with the enormous community effort in the field collectively makes Drosophila an extremely attractive model system for systems neuroscience. We believe that our goal of linking synaptic plasticity to behavior by understanding circuit logic at each relay would be a finite, rather than infinite, endeavor in this system.

People

Toshihide Hige, Ph.D

hige@email.unc.edu

Principal Investigator

Toshi received his Ph.D. from Kyoto University in Japan, where he studied synaptic physiology using rat brain slices. He switched to the Drosophila system when he started his postdoc in Glenn Turner's lab at Cold Spring Harbor Laboratory (and later at Janelia Research Campus). While in the lab, Toshi enjoys one-to-one conversations with a neuron through a glass pipette. When outside the lab, he is constantly looking for an opportunity to eat good food.

Visiting Scientist

People

Toshihide Hige, Ph.D

Principal Investigator

hige@email.unc.edu

Drew Davidson, Ph.D

Postdoctoral Fellow

Drew earned his PhD at Tulane University in New Orleans, LA, where he used in vivo imaging to study the effects of aging on structural plasticity in the rodent motor cortex. He joined the Hige lab to use similar imaging techniques to explore basic questions in neuroscience. He is particularly interested in the subcellular processing of sensory input. Outside of the lab, Drew enjoys playing and watching basketball with his wife and trail running with his dog.

Chad Heer, Ph.D

Postdoctoral Fellow

Chad completed his PhD at The University of Chicago in the lab of Dr. Mark Sheffield, where he used in-vivo imaging techniques to characterize the activity of dopaminergic inputs to the hippocampus during spatial navigation and learning. As a part of the Hige lab, he is excited to use imaging techniques, genetic approaches, and behavioral assays to dissect the neural circuits underlying behavior in Drosophila. Chad enjoys spending his time outside of the lab baking pizza, playing videogames, and hiking with his girlfriend and their dog.

Daichi Yamada, Ph.D

Postdoctoral Fellow

Daichi studied auditory circuits in the fly brain at Nagoya University in Japan, before joining the Hige lab. His Ph.D. thesis was on the neuronal processing of the courtship songs. Now he is eager to learn new physiological techniques and tackle questions in learning and memory. Daichi graduated from the same high school as 'Godzilla' Matsui, MVP of the World Series 2009, and he is also a good baseball player.

Debapriya Ghosh

Graduate Student (QBio)

Debapriya completed her Master's in Chemical and Molecular Biology from Indian Institute of technology Kharagpur. She previously studied the cerebellar circuit in zebrafish larvae in National Centre for Biological Sciences, Bangalore. Her broad research interests are to understand the physiological basis underlying the emergence of behavior in an animal. Outside lab, Debapriya engages in the art of Bharatanatyam dance and loves listening to Indian classical music.

This could be you!

Postdoctoral fellow or Ph.D. student

We are looking for enthusiastic people to join our lab! Please see the detail here.

Former Members

Will Silander (Research Technician)
Shivam Kaushik (Graduate Student/QBio)
Samantha Chery (Rotation Student)
Carlotta Martelli (Visiting Scientist)

Publications

*(co-)corresponding author

New!

Dopamine-dependent plasticity is heterogeneously expressed by presynaptic calcium activity across individual boutons of the Drosophila mushroom body

Davidson, A.M., Kaushik, S., and Hige, T.*

eNeuro ENEURO.0275-23.2023 (2023)

A lightweight data-driven spiking neural network model of Drosophila olfactory nervous system with dedicated hardware support
Nanami, T., Yamada, D., Someya, M., Hige, T., Kazama, H., and Kohno, T.
bioRxiv (2023) – Preprint –

Cyclic nucleotide-induced bidirectional long-term synaptic plasticity in Drosophila mushroom body
Yamada, D. and Hige, T.*
bioRxiv (2023) – Preprint –

Neural circuit mechanisms for transforming learned olfactory valences into wind-oriented movement

Aso, Y.*, Yamada, D., Bushey, D., Hibbard, K., Sammons M., Otsuna H., Shuai, Y., and Hige, T.*

Elife e85756. (2023)

– preprint published in bioRxiv on 12/22/2022

Hierarchical architecture of dopaminergic circuits enables second-order conditioning in Drosophila

Yamada, D., Bushey, D., Li, F., Hibbard, K., Sammons, M., Funke, J., Litwin-Kumar, A., Hige, T.*, and Aso, Y.*

Elife e79042. (2023)

– preprint published in bioRxiv on 3/31/2022

Lateral axonal modulation is required for stimulus-specific olfactory conditioning in Drosophila

Manoim, J.E., Davidson, A.M., Weiss, S., Hige, T.*, and Parnas, M.*

Curr. Biol. 32, 4438-4450.e5. (2022)

– preprint published in bioRxiv on 6/3/2022

What can tiny mushrooms in fruit flies tell us about learning and memory?

Hige, T.*

Neurosci. Res. 129, 8-16. (2018)

A connectome of a learning and memory center in the adult Drosophila brain.

Takemura, S-Y., Aso, Y., Hige, T., Wong, A., Lu, Z., Xu, C.S., Rivlin, P.K., Hess, H.F., Zhao, T., Parag, T., Berg, S., Huang, G., Katz, W., Olbris, D.J., Plaza, S., Umayam, L., Aniceto, R., Chang, L-A., Lauchie, S., Ogundeyi, O., Ordish, C., Shinomiya, A., Sigmund, C., Takemura, S., Tran, J., Turner, G.C., Rubin, G.M., and Scheffer, L.K.

Elife e26975. (2017)

Direct neural pathways convey distinct visual information to Drosophila mushroom bodies.

Vogt, K., Aso, Y., Hige, T., Knapek, S., Ichinose, T., Friedrich A.B., Turner, G.C., Rubin, G.M., and Tanimoto H.

Elife e14009. (2016)

Heterosynaptic plasticity underlies aversive olfactory learning in Drosophila.

Hige, T.*, Aso, Y., Modi, M.N., Rubin, G.M., and Turner, G.C*.

Neuron 88, 985-998. (2015)

Plasticity-driven individualization of olfactory coding in mushroom body output neurons.

Hige, T., Aso, Y., Rubin, G.M., and Turner, G.C.

Nature 526, 258-262. (2015)

Learning: The good, the bad, and the fly.

Hige, T., and Turner, G.C.