Substantia Nigra Inspection
Substantia Nigra Inspection - Related Videos
05:13
A Viral Vector Injection into the Rat Substantia Nigra for Neurodegenerative Disease Modeling
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2025
This video demonstrates the process of injecting a viral vector into the rat substantia nigra to model Parkinson's disease. It outlines the steps for preparing the rat, microinjecting the viral vector into the substantia nigra, and the recovery procedure.
08:19
Stereological Estimation of Dopaminergic Neuron Number in the Mouse Substantia Nigra Using the Optical Fractionator and Standard Microscopy Equipment
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Cited by 45 •
2017
This work presents a step-by-step protocol for the unbiased stereological estimation of dopaminergic neuronal cell numbers in the mouse substantia nigra using standard microscopy equipment (i.e., a light microscope, a motorized object table (x, y, z plane), and public domain software for digital image analysis.
09:54
Comprehensive Profiling of Dopamine Regulation in Substantia Nigra and Ventral Tegmental Area
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Cited by 44 •
2012
Dopamine is distinctly regulated in the midbrain nuclei, which contain the cell bodies and dendrites of the dopamine neurons. Here we describe a dissection and sample-handling approach to maximize results, and thus conclusions and insights, on dopamine regulation in the midbrain nuclei of the substantia nigra (SN) and ventral tegmental area (VTA) in rodents.
05:14
Standardized Data Acquisition for Neuromelanin-Sensitive Magnetic Resonance Imaging of the Substantia Nigra
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Cited by 13 •
2021
This protocol shows how to acquire neuromelanin-sensitive magnetic resonance imaging data of the substantia nigra.
05:02
Observation and Inspection
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2023
Source: Jaideep S. Talwalkar, MD, Internal Medicine and Pediatrics, Yale School of Medicine, New Haven, CT Observation and inspection is fundamental to physical examination and begins at the first point of contact with a patient. While observation and inspection are often used interchangeably, observation is a general term that refers to the careful use of one's senses to gain information. Inspection is an act limited to what one can observe visually, and when referring to physical examination,...
FAQs
Inspection separates the two principal subdivisions by combining their anatomical position with cellular appearance. The pars compacta is evaluated as the dopamine-producing region, whereas the pars reticulata is interpreted as an output-related region. Examining neuronal organization within these areas helps connect visible tissue patterns to distinct roles in movement control and reward-related signaling.
Pigmentation, when relevant, adds a visual feature to the examination of substantia nigra tissue. It should be considered alongside anatomical localization and neuronal organization, not as an isolated observation. Combining these features gives investigators a structured description for examining tissue appearance in experimental models and neuropathological studies, where cellular or structural changes may be important.
Accurate localization links an observed region to its place within basal ganglia circuitry. That context matters because the pars compacta and pars reticulata are not interpreted identically: one is associated with dopamine production and the other with output-related function. Consequently, tissue findings can be discussed in relation to movement control and reward-related signaling rather than as isolated microscopic features.
An examination may combine anatomical localization with microscopy, imaging, and tissue analysis. Localization identifies the relevant midbrain structure and its subdivisions, while the visual or tissue-based methods enable assessment of neuronal organization and, where relevant, pigmentation. The combined workflow supports a more complete description than relying on a single type of observation.
It helps identify structural or cellular changes associated with Parkinson’s disease. Investigators can apply the examination within neuropathological studies or experimental models, using the observed organization and tissue appearance to characterize disease-related findings. The inspection therefore contributes evidence for interpreting model relevance and for connecting tissue changes with affected neural circuitry.
By documenting neuronal organization, pigmentation where relevant, and the distinction between substantia nigra subdivisions, the examination provides a foundation for interpreting basal ganglia circuitry, experimental models, and neuropathology. It may also help frame potential therapeutic targets by relating structural or cellular observations to movement control and reward-related signaling.