Guide/Workflow for freely behaving animal experiments
From Miniscope
Guide · 21 May 2026
An overview and workflow for thinking through and implementing freely behaving animals experiments
Workflow
Review status
| Last reviewed | 2026-06-24 |
| Reviewer | User:DAharoni |
| Next review due | 2027-06-24 |
| Review interval | 12 months |
Review history
- 2026-06-24 — User:DAharoni — Passed
Overview
This workflow covers all major stages of a Miniscope freely moving calcium imaging experiment, from initial planning through data acquisition. Each stage links to a dedicated sub-guide with step-by-step instructions.
Miniscope experiments involve more interdependent steps than standard behavioral studies. Viral expression windows, surgical attrition, imaging quality checks, and behavioral habituation all interact — and a problem at any one stage can compromise the entire experiment. The goal of this workflow is to make those dependencies explicit so that problems are caught early, before irreplaceable animals and months of preparation are lost.
Before starting: The most important thing you can do before any animal enters this workflow is read the primary literature on calcium imaging in your brain region / behavioral paradigm of interest. How experiments have been done by other groups — which constructs they used, how long they waited for expression, what attrition they encountered, what behavioral complications arose — is the single best guide to planning your own experiment. The sub-guides here provide a general framework; papers from your specific field provide the details that make it work.
Workflow Stages
| Stage | Guide | What it covers |
|---|---|---|
| 1 | Guide/Experiment Planning for Freely Behaving Animals | Literature review, animal number estimation with imaging-specific attrition, behavioral equipment sourcing and validation, surgical workflow planning, backwards timeline construction |
| 2 | Guide/Surgery and baseplating | Viral injection, GRIN lens selection and implantation, headcap construction, imaging signal verification, baseplate surgery |
| 3 | Guide/Animal Handling & Habituation | Post-surgical recovery, experimenter handling, protective cap removal practice, Miniscope mounting and habituation, behavioral apparatus acclimation |
| 4 | Guide/Behavioral Setup | Recording environment requirements, behavioral camera setup, tracking software configuration, lighting conditions, cable and commutator management. |
| 5 | Guide/Pre-Experiment Checklist | A checklist to complete before every recording session. |
| 5 | Guide/Data Acquisition | Pre-session preparation, focal plane and LED setup, recording procedures, session monitoring, session-end procedures |
| 6 | Guide/Data processing considerations | Motion correction, cell detection, signal extraction, behavioral alignment (existing guide) |
References / Further Reading
- Zhou ZC et al. (2023) Deep-brain optical recording of neural dynamics during behavior. Neuron 111:3716–3738. https://doi.org/10.1016/j.neuron.2023.09.006 — Comprehensive primer on behavioral design, indicator selection, recording modality tradeoffs, GRIN lens optics, and analysis pipelines. Figure 1G provides a visual timeline summary directly applicable to Miniscope experiment planning.
- Zhao P, Aharoni D, Golshani P. (2025) GRIN lens implantation strategies for in vivo calcium imaging using miniature microscopy. PLoS One 20(5):e0323256. https://doi.org/10.1371/journal.pone.0323256 — Step-by-step UCLA Miniscope surgical protocol covering lens selection by brain region, three implantation strategies, and multi-lens implantation for bilateral mPFC or mPFC + NAc. Protocol also available on protocols.io.
- Malvaut S et al. (2020) Deciphering Brain Function by Miniaturized Fluorescence Microscopy in Freely Behaving Animals. Front Neurosci 14:819. https://doi.org/10.3389/fnins.2020.00819 — Review of one-color, two-color, optogenetics-combined, multi-region, and wireless mini-endoscope designs, with hardware tradeoffs and habituation implications.
- Kingsbury L et al. (2019) Correlated Neural Activity and Encoding of Behavior Across Brains of Socially Interacting Individuals. Cell 178:429–446. https://doi.org/10.1016/j.cell.2019.05.022 — Practical reference for social interaction paradigm design, cable management, and multi-animal habituation protocols.
- Chen S et al. (2020) Miniature Fluorescence Microscopy for Imaging Brain Activity in Freely-Behaving Animals. Neurosci Bull 36(10):1182–1190. https://doi.org/10.1007/s12264-020-00561-z
- Aharoni D and Hoogland TM (2019) Circuit Investigations With Open-Source Miniaturized Microscopes: Past, Present and Future. Front Cell Neurosci 13:141. https://doi.org/10.3389/fncel.2019.00141
- Resendez SL et al. (2016) Visualization of cortical, subcortical and deep brain neural circuit dynamics during naturalistic mammalian behavior with head-mounted microscopes and chronically implanted lenses. Nat Protoc 11:566–597. https://doi.org/10.1038/nprot.2016.021 — Detailed surgical and imaging protocol for GRIN lens implantation and Miniscope imaging.