Focal Cortical Lesion
Focal Cortical Lesion - Related Videos
06:07
Modeling Stroke in Mice: Focal Cortical Lesions by Photothrombosis
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Cited by 12 •
2021
Described here is the photothrombotic stroke model, where a stroke is produced through the intact skull by inducing permanent microvascular occlusion using laser illumination after administration of a photosensitive dye.
08:40
Photothrombotic Ischemia: A Minimally Invasive and Reproducible Photochemical Cortical Lesion Model for Mouse Stroke Studies
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Cited by 226 •
2013
Photothrombosis is a quick, minimally-invasive technique for inducing small and well-delimited infarction in areas of interest in highly reproducible manner. It is particularly suitable for studying cellular and molecular responses underlying brain plasticity in transgenic mice.
08:39
Assessing Cortical Cerebral Microinfarcts on High Resolution MR Images
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Cited by 24 •
2015
A high resolution ex vivo 7T MR imaging protocol is presented, to perform MR-guided histopathological validation of microvascular pathology in post-mortem human brain tissue. Furthermore, guidelines are provided for the assessment of cortical microinfarcts on in vivo 7T as well as 3T MR images.
04:02
System for Focal, Closed-System Central Nervous System Injury
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Cited by 1 •
2024
This protocol describes a custom overpressure air system designed to induce closed-system central nervous system (CNS) injuries in mice, including ocular, brain, and spinal cord traumas. The goal of this protocol is to provide a framework for researchers to easily adapt and expand the system for their unique CNS trauma studies.
08:57
Experimental Demyelination and Remyelination of Murine Spinal Cord by Focal Injection of Lysolecithin
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Cited by 79 •
2015
Demyelinating diseases can be modeled in animals by focal application of lysolecithin into the CNS. A single injection of lysolecithin into mouse spinal cord produces a lesion that spontaneously repairs over time. The goal is to study factors involved in de- and remyelination, and to test agents for enhancing repair.
FAQs
Symptoms depend strongly on which cortical functions and connections are disrupted. Damage in one area may affect perception or movement, while involvement of another may alter language, memory, or other higher functions. This location–symptom relationship allows clinicians and neuroscientists to compare anatomical findings with observed behavior and infer the functions supported by affected regions.
Lesion size and underlying cause can shape both the severity and pattern of functional disruption. A larger abnormal area may interfere with more cortical tissue or connections, whereas the cause may influence how the abnormality develops or progresses. These variables help explain why two lesions affecting broadly similar regions can produce different clinical findings.
Disruption of cortical neurons and their connections can alter local signaling and, in some cases, increase network excitability. A more excitable network is more prone to abnormal electrical activity, making seizure-related disorders an important clinical context for these lesions. Electroencephalography can help evaluate this electrical activity alongside structural and neurological findings.
Lesion-symptom mapping examines relationships between the location of structural abnormalities and specific behavioral or cognitive changes. By comparing lesion sites with neurological or cognitive findings across cases, researchers can investigate which cortical regions contribute to particular functions. The approach therefore supports brain–behavior research while complementing clinical imaging and examination.
Evaluation commonly combines a neurological examination with magnetic resonance imaging and electroencephalography. The examination identifies functional changes, imaging characterizes structural abnormalities, and electroencephalography assesses brain electrical activity, including findings relevant to seizure-related disorders. Considering these results together supports diagnosis, monitoring of progression, and decisions about subsequent management.
Focal cortical lesions provide a way to study how localized structural disruption affects behavior and cognition. Researchers can relate the affected cortical area to changes in perception, movement, language, memory, or other higher functions, then use lesion-symptom mapping to examine brain–behavior relationships. Clinically, the same framework can inform monitoring and treatment of seizure-related disorders.