Brain Explant Dissection
Brain Explant Dissection - Related Videos
02:21
Dissection and Mounting of Fruit Fly Larval Brain Explants
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2025
This video demonstrates the dissection and mounting of brain explants from Drosophila larvae. The central nervous system (CNS), attached to eye disks, is extracted from the larvae and then mounted on a glass slide in a physiological saline solution.
08:24
Dissection and Culture of Mouse Dopaminergic and Striatal Explants in Three-Dimensional Collagen Matrix Assays
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Cited by 13 •
2012
Explants from the midbrain dopamine system and striatum are used in a collagen matrix assay for the in vitro analysis of mesostriatal and striatonigral pathway development. In this assay axonal outgrowth and guidance can be manipulated and quantified. It can also be modified for assessing other regions or molecular cues.
06:40
Laser-guided Neuronal Tracing In Brain Explants
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2015
We describe a technique to label neurons and their processes via anterograde or retrograde tracer injections into brain nuclei using an in vitro preparation. We modified an existing method of in vitro tracer electroporation by taking advantage of fluorescently labeled mouse mutants and basic optical equipment in order to increase labeling accuracy.
09:47
Isolation of Cerebrospinal Fluid from Rodent Embryos for use with Dissected Cerebral Cortical Explants
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Cited by 20 •
2013
The ventricular cerebrospinal fluid (CSF) bathes the neuroepithelial and cerebral cortical progenitor cells during early brain development in the embryo. Here we describe the method developed to isolate ventricular CSF from rodent embryos of different ages in order to investigate its biological function. In addition, we demonstrate our cerebral cortical explant dissection and culture technique that allows for explant growth with minimal volumes of culture medium or CSF.
09:07
Dissection of Xenopus laevis Neural Crest for in vitro Explant Culture or in vivo Transplantation
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Cited by 22 •
2014
This protocol describes how to dissect premigratory cranial neural crest (NC) from Xenopus laevis neurulas. These explants can be plated on fibronectin and cultured in vitro, or grafted back into host embryos. This technique allows studying the mechanisms of NC epithelium-to-mesenchyme transition, migration, and differentiation.
FAQs
Preserving anatomical relationships allows researchers to examine regional organization and cellular arrangement together rather than studying cells in isolation. This context supports analyses that connect tissue structure with neural function, connectivity, and experimental responses. As a result, brain explants can reveal relationships that may be lost when tissue is converted into dissociated cell preparations.
The choice depends on the anatomical question being asked. An intact preparation retains broader relationships among brain regions, whereas a defined explant focuses analysis on a selected neural structure. Using either format helps researchers match the tissue scope to studies of development, connectivity, pathology, or localized responses under ex vivo conditions.
Controlled ex vivo conditions let investigators examine brain tissue outside the organism while managing the experimental setting. This makes it possible to assess responses in a prepared neural structure and relate those findings to its preserved organization. The approach therefore provides an intermediate level of complexity between whole-animal experiments and simplified cell-based models.
A typical workflow begins by removing the brain or selecting the relevant neural structure, followed by separating the tissue with fine instruments. The resulting explant is then prepared for a chosen downstream analysis, such as microscopy, molecular analysis, electrophysiology, or culture. Careful handling throughout the workflow helps retain the anatomical relationships needed for interpretation.
Prepared explants can support several complementary readouts. Microscopy examines tissue organization, molecular analysis characterizes biological features, electrophysiology investigates neural function, and culture allows the tissue to be maintained for ex vivo study. Selecting among these approaches enables researchers to connect anatomy with cellular organization, function, and responses to experimental conditions.
Brain explant dissection is useful when a study requires more anatomical context than dissociated cells provide but a more accessible preparation than a whole-animal experiment. In neuroscience, it supports investigations of development, connectivity, pathology, and experimental responses. Its ability to preserve regional structure makes it a practical bridge between organism-level and cell-based research.