In Situ Preparation
In Situ Preparation - Related Videos
08:27
Preparation of Drosophila Central Neurons for in situ Patch Clamping
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Cited by 9 •
2012
In situ patch clamp recordings are used for electrophysiological characterization of neurons in intact circuitry. In the Drosophila genetic model patch clamping is difficult because the CNS is small and surrounded by a robust sheath. This article describes the procedure to remove the sheath and clean neurons for subsequent patch clamp recordings.
08:17
Sample Preparation for In Situ Cryotomography of Mammalian Cells
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Cited by 1 •
2023
This method provides an accessible and flexible protocol for the preparation of electron microscopy (EM) grids for in situ cellular cryotomography and correlative light and electron microscopy (CLEM).
08:00
Whole-Mount In Situ Hybridization
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2023
Whole-mount in situ hybridization (WMISH) is a common technique used for visualizing the location of expressed RNAs in embryos. In this process, synthetically produced RNA probes are first complementarily bound, or "hybridized," to the transcripts of target genes. Immunohistochemistry or fluorescence is then used to detect these RNA hybrids, revealing spatial and temporal patterns of gene expression. Unlike traditional in situ hybridization techniques, which require thin tissue sections whose...
08:24
Zebrafish In Situ Spinal Cord Preparation for Electrophysiological Recordings from Spinal Sensory and Motor Neurons
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Cited by 3 •
2017
This manuscript describes methods for electrophysiological recordings from spinal neurons of zebrafish embryos and larvae. The preparation maintains neurons in situ and often involves minimum dissection. These methods allow for the electrophysiological study of a variety of spinal neurons, from the initial electrical excitability acquisition through the early larval stages.
09:31
Preparation of Authigenic Pyrite from Methane-bearing Sediments for In Situ Sulfur Isotope Analysis Using SIMS
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Cited by 2 •
2017
Analyses of the sulfur isotopic composition (δ34S) of pyrite from methane-bearing sediments have typically focused on bulk samples. Here, we applied secondary ion mass spectroscopy to analyze the δ34S values of various pyrite generations to understand the diagenetic history of pyritization.
FAQs
Their preservation lets researchers interpret signals alongside the neurons, glia, synapses, and surrounding tissue that shape local interactions. This context helps connect observed activity with circuit organization rather than treating each cell as an isolated unit. As a result, measurements can address how neural signals are generated, transmitted, and modified within anatomically meaningful networks.
Unlike dissociated or extensively removed tissue, this approach retains local connectivity and tissue organization during analysis. That distinction matters because separation can remove relationships among neighboring cells and synapses that influence circuit behavior. In situ work therefore supports questions about network structure and cellular interactions that may be difficult to answer from isolated cells alone.
The approach can support imaging, electrophysiological, molecular, and pharmacological analyses. These readouts examine different aspects of the same preserved context: imaging can assess organization or activity, electrophysiology can examine neural signals, and molecular or pharmacological analyses can investigate cellular properties or responses under controlled conditions. Combining modalities broadens circuit-level interpretation.
Controlled conditions allow researchers to examine neural function while maintaining the relevant anatomical setting. The preparation can be used to study how signals change, how cells interact, or how circuit activity relates to surrounding tissue. This balance between experimental control and retained organization is a central advantage over approaches that remove more of the native context.
A study generally begins by maintaining the selected cells, tissue, or neural circuit in its anatomical location. Researchers then apply a chosen analysis, such as imaging, electrophysiology, molecular measurement, or pharmacological manipulation, while controlling experimental conditions. The resulting observations can be related back to preserved connectivity and tissue organization, allowing structure and function to be examined together.
Neuroscientists may choose it when the research question depends on brain architecture, circuit activity, or interactions between neural cell types. It is particularly informative when removing tissue could obscure the relationship between structure and function. The method can therefore complement studies of cellular behavior by showing how that behavior fits within a larger local circuit.
Because the anatomical setting remains available during analysis, findings can link cellular events to circuit-level outcomes. Studies may examine how neural signals travel through local connections, how activity is modified by surrounding cells, or how disease-related changes alter tissue organization and function. This makes the preparation relevant to fundamental neuroscience and investigations of pathological neural changes.