Cerebral Inactivity
Cerebral Inactivity - Related Videos
11:15
Pooled shRNA Screen for Reactivation of MeCP2 on the Inactive X Chromosome
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Cited by 2 •
2018
We report a small hairpin RNA (shRNA) and next generation sequencing-based protocol for identifying regulators of X-chromosome inactivation in a murine cell line with firefly luciferase and hygromycin resistance genes fused to the methyl CpG binding protein 2 (MeCP2) gene on the inactive X chromosome.
05:03
Precise Electrochemical Sizing of Individual Electro-Inactive Particles
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Cited by 1 •
2023
As an analytical technique, nanoimpact electrochemistry, an increasingly important approach to counting and characterizing nanometer-scale, electro-inactive particles, suffers from poor precision due to the heterogeneous current distributions that arise from its use of ultramicroelectrodes. Outlined here is a generalized approach, termed "electrocatalytic interruption," that enhances precision in such measurements.
04:37
Comprehensive Understanding of Inactivity-Induced Gait Alteration in Rodents
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2022
The present protocol describes three-dimensional motion tracking/evaluation to depict gait motion alteration of rats after exposure to a simulated disuse environment.
13:50
Focal Cerebral Ischemia Model by Endovascular Suture Occlusion of the Middle Cerebral Artery in the Rat
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Cited by 107 •
2011
Surgical induction of ischemic brain damage in the rat is a widely used model for stroke research. Here we demonstrate the induction of focal cerebral ischemia by occlusion of the middle cerebral artery. Visualization of the resulting infarct by histological staining and magnetic resonance imaging is also shown.
08:27
A Non-random Mouse Model for Pharmacological Reactivation of Mecp2 on the Inactive X Chromosome
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2019
Here, we describe a protocol to generate a viable female murine model with non-random X chromosome inactivation, i.e., the maternally-inherited X chromosome is inactive in 100% of the cells. We also describe a protocol to test feasibility, tolerability, and safety of pharmacological reactivation of the inactive X chromosome in vivo.
FAQs
Reduced brain activity does not identify a single cause. Sleep, anesthesia, and metabolic suppression can lower neuronal firing and synaptic communication in potentially reversible ways, whereas severe brain injury may produce persistent neurological dysfunction. This distinction matters because clinicians must interpret low activity alongside the broader clinical context rather than treating one recording as a complete prognosis.
Electroencephalography, or EEG, records electrical signals associated with brain activity and can reveal changes accompanying reduced neuronal function. Its findings help characterize the activity state, but they do not independently establish whether suppression is reversible or persistent. For that reason, EEG results are considered together with neurological examinations and other physiological or imaging data.
Neuronal firing reflects electrical signaling by individual nerve cells, while synaptic communication allows signals to pass between them. A substantial reduction in both processes indicates that communication across neural networks has diminished, which helps explain altered consciousness or neurological responsiveness. Evaluating these linked processes provides a mechanistic basis for interpreting changes detected during sleep, anesthesia, or injury.
Sleep and anesthesia are contexts in which brain activity can be suppressed without necessarily indicating permanent neurological damage. Severe brain injury may produce a more persistent reduction in function. The important distinction is not simply the degree of electrical quieting, but whether the altered state fits a reversible condition or ongoing neurological dysfunction when examined with clinical and physiological evidence.
Assessment should combine activity recordings with a neurological examination and additional physiological or imaging information. EEG contributes electrical measurements, while examination findings provide clinical evidence about neurological function. Other data help place the recording in context. This combined approach supports a more careful distinction between reversible suppression and persistent dysfunction than any single measurement could provide.
The topic is particularly relevant to studies of sleep and anesthesia, evaluation of coma, and assessment after severe brain injury. In each setting, investigators or clinicians examine how reduced activity relates to consciousness and neurological function. These comparisons help determine whether observed suppression reflects the expected context, a reversible state, or possible persistent dysfunction.