Kaplan Lab

Brain development · Cell type diversity · Naturalistic behavior

How does the brain control behavior in early life?

The brain does not "wait" until it is fully mature before it functions. Rather, developing neuronal circuits are active, responsive to sensory inputs, and drive behavior, in newborns and even in the womb. We combine molecular and neurophysiological approaches to investigate circuits in the infant brain underlying (1) sleep and (2) social interactions with parents and siblings. Our goal is to understand how the immature brain functions, and how those functions feed back on the brain to affect brain development.

Subcortical cell type diversity: the brain's "dark matter"

Subcortical brain regions like the hypothalamus and brainstem harbor 1000s of distinct neuronal types. The behavioral and physiological functions of the vast majority of these neuron types are unknown. We develop approaches to target these neuron types in a high-throughput manner, "de-orphan" their functions, and map their connectivity. This helps us understand subcortical circuits underlying behavior and physiology, for example as labeled lines or distributed networks.

Subcortical cell type diversity
Harris Kaplan, Assistant Professor

Harris Kaplan

Assistant Professor

Ben Bellanger, Senior Lab Technician

Ben Bellanger

Senior lab technician
and lab manager

August 2026

Ben Bellanger joins the lab!

Ben Bellanger joins the Kaplan Lab as senior lab technician and lab manager. Welcome, Ben!

August 2026

Kaplan Lab opens at the University of Virginia!

Harris Kaplan joins the UVA Department of Biology as Assistant Professor. The lab is located in Gilmer Hall and is actively recruiting graduate students and postdoctoral researchers.

Nature cover article: Sensory input, sex, and function shape hypothalamic cell type development
Nature
2025

Sensory input, sex, and function shape hypothalamic cell type development

Kaplan HS, Logeman BL, Zhang K, Yawitz TA, Santiago C, Sohail N, Talay M, Seo C, Naumenko S, Ho Sui SJ, Ginty DD, Ren B, Dulac C  ·  Nature 647, 157–168 (2025)

Read paper
2025
Nature 647, 157–168 · 2025

Sensory input, sex, and function shape hypothalamic cell type development

Kaplan HS, Logeman BL, Zhang K, Yawitz TA, Santiago C, Sohail N, Talay M, Seo C, Naumenko S, Ho Sui SJ, Ginty DD, Ren B, Dulac C

Physiological Reviews 105, 315–381 · 2025

The neurobiology of parenting and infant-evoked aggression

Kaplan HS*, Horvath PM*, Rahman MM*, Dulac C *Equal contribution.

Nature 647, 51–59 · 2025

The new frontier in understanding human and mammalian brain development

Nowakowski TJ, Nano PR, Matho KS, Chen X, Corrigan EK, Ding W, Gao Y, Heffel M, Jayakumar J, Kaplan HS, Kronman FN, Kovner R, Mannens CCA, Song M, Steyert MR, Venkatesan S, Wallace JL, Wang L, Werner JM, Zhang D, Yuan G, Zuo G, Ament SA, Colantuoni C, Dulac C, Fan R, Gillis J, Kriegstein AR, Krienen FM, Kim Y, Linnarsson S, Mitra PP, Pollen AA, Sestan N, Tward DJ, van Velthoven CTJ, Yao Z, Bhaduri A, Zeng H

bioRxiv · 2025 · Preprint

Brain-immune interactions generate pathogen-specific sickness states

Sullivan ZA, Wong BJ, Kapoor V, Vincze PK, Kaplan HS, Giraudet P, Watson BR, Misherghi A, Lourido S, Moffitt JR, Dulac C

bioRxiv · 2025 · Preprint

Cell type-specific hormonal signaling configures hypothalamic circuits for parenting

Logeman BL, Horvath PM, Talay M, Kapoor V, Kaplan HS, Dulac C

2024
Cell Reports Methods 4 (2) · 2024

Long-term, high-resolution in vivo calcium imaging in pigeons

Nimpf S, Kaplan HS, Nordmann GC, Cushion T, Keays DA

2020
Neuron 105, 562–576 · 2020

Nested neuronal dynamics orchestrate a behavioral hierarchy across timescales

Kaplan HS*, Salazar Thula O*, Khoss N, Zimmer M *Equal contribution.

Current Opinion in Neurobiology 64, 60–69 · 2020

Brain-wide representations of ongoing behavior: a universal principle?

Kaplan HS, Zimmer M

2018
Phil Trans R Soc B 373 (1758) · 2018

Sensorimotor integration in C. elegans: a reappraisal towards dynamic and distributed computations

Kaplan HS, Denham JE, Ranner T, Cohen N

Neuron 97, 258–260 · 2018 · Preview

Sensorimotor integration for decision making: how the worm steers

Kaplan HS, Zimmer M

2016
eLife 5, e14116 · 2016

Regulation of two motor patterns enables the gradual adjustment of locomotion strategy in C. elegans

Hums I, Riedl J, Mende F, Kato S, Kaplan HS, Latham R, Sonntag M, Traunmüller L, Zimmer M

2015
Cell 163, 656–669 · 2015

Global brain dynamics embed the motor command sequence of Caenorhabditis elegans

Kato S*, Kaplan HS*, Schrödel T*, Skora S, Lindsay TH, Yemini E, Lockery S, Zimmer M *Equal contribution.

2014
PLOS Biology 12 (9), e1001959 · 2014

Differentially timed extracellular signals synchronize pacemaker neuron clocks

Collins B, Kaplan HS, Cavey M, Lelito KR, Bahle AH, Zhu Z, Macara AM, Roman G, Shafer OT, Blau J

Open Positions

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