Confocal Imaging
Confocal Imaging - Related Videos
10:48
Imaging Biological Samples with Optical and Confocal Microscopy
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2023
Source: Peiman Shahbeigi-Roodposhti and Sina Shahbazmohamadi, Biomedical Engineering Department, University of Connecticut, Storrs, Connecticut Optical microscopes have been around for centuries, and while they reached their theoretical limitation of resolution decades ago, new equipment and techniques, such as confocal and digital image processing, have created new niches within the field of optical imaging. The best optical microscopes will typically have a resolution down to 200 nm in ideal...
07:27
Live Confocal Imaging of Developing Arabidopsis Flowers
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Cited by 16 •
2017
Live confocal imaging provides biologists with a powerful tool to study development. Here, we present a detailed protocol for the live confocal imaging of developing Arabidopsis flowers.
09:10
Ex Vivo Imaging of Postnatal Cerebellar Granule Cell Migration Using Confocal Macroscopy
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Cited by 8 •
2015
During postnatal cerebellum development, immature granule cells originating from the germinal zone exhibit distinct modalities of migration to reach their final destination and to establish neuronal networks. This protocol describes the preparation of cerebellar slices and the confocal macroscopic approach used to investigate the factors that regulate neuronal migration.
03:16
Three-dimensional Imaging of Immunolabeled Astrocytes Using Confocal Microscopy
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2025
Source: Bagheri, M., et. al. Protocol for Three-dimensional Confocal Morphometric Analysis of Astrocytes. J. Vis. Exp. (2015).This video demonstrates the imaging of fluorescently labeled astrocytes in a mouse brain section using a confocal microscope. The brain section is positioned under the appropriate objective lens, and suitable fluorophores and filters are selected. After optimizing the exposure automatically, the scanning parameters are defined to ensure high-resolution 2D images. Z-stack...
05:25
Quantification of Dendritic Spines Using Confocal Microscopy Imaging
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2025
Source: Gouder, et. al. Three-dimensional Quantification of Dendritic Spines from Pyramidal Neurons Derived from Human Induced Pluripotent Stem Cells. J. Vis. Exp. (2015).This video demonstrates the imaging and analysis of dendritic spines in transduced, immunolabeled pyramidal neurons using confocal microscopy. Background noise is reduced, and dendrites are traced by estimating their diameter and length. Automated spine segmentation involves setting parameters for dendrite and spine dimensions...
FAQs
The pinhole blocks fluorescence emitted from outside the selected focal plane before light reaches the detector. This limits the contribution of out-of-focus signal and preserves detail from the region being examined. In complex specimens such as brain tissue, that optical filtering helps distinguish nearby structures that conventional wide-field microscopy may visually obscure.
Sequential optical sections record fluorescence from different focal planes within a specimen. When these sections are assembled, they provide a three-dimensional representation rather than a single two-dimensional view. This is especially useful for examining the spatial organization of neurons, brain tissue, and synaptic networks, where structure extends through multiple focal planes.
Confocal imaging uses a focused laser, a defined focal plane, and a pinhole to restrict detected emission, whereas conventional wide-field microscopy may retain more out-of-focus light in the image. Consequently, confocal images can reveal spatial detail that wide-field views obscure, supporting clearer examination of complex neuronal structures and cellular relationships.
A fluorescence workflow begins with a labeled specimen positioned for imaging. A focused laser excites the labels, and emitted light passes toward detectors through a pinhole that excludes out-of-focus signal. The system captures sequential optical sections, which can then be assembled into a three-dimensional reconstruction for analysis of the specimen's organization.
In neuroscience, the method is useful when researchers need spatial information about neuronal morphology, protein localization, cellular interactions, or neural circuits. Its optical sections can separate structures distributed through brain tissue and support three-dimensional views. These capabilities make it suitable for investigating both the organization of individual neurons and relationships within synaptic networks.
Confocal imaging can provide high-resolution spatial views of labeled structures within neurons and brain tissue. Depending on the study, researchers can examine neuronal morphology, determine where proteins are localized, assess interactions between cells, or visualize the arrangement of synaptic networks. Three-dimensional reconstructions add information about how these features are organized across focal planes.