Related Experiment Video
Updated: Feb 16, 2026
09:07
Electroconvulsive Seizures in Rats and Fractionation of Their Hippocampi to Examine Seizure-induced Changes in Postsynaptic Density Proteins
Published on: August 15, 2017
12.7K
Out of thin air: Hyperventilation-triggered seizures
Kathryn A Salvati1, Mark P Beenhakker1
1Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, VA 22903, United States.
Brain Research
|December 31, 2017
Summary
Voluntary hyperventilation triggers absence seizures in most individuals. This review explores historical observations to understand the unknown mechanisms linking breathing and these epilepsy seizures.
Area of Science:
- Neurology
- Epileptology
- Neurophysiology
Background:
- Absence epilepsy is frequently provoked by hyperventilation.
- The underlying physiological mechanisms remain poorly understood.
- Historical clinical observations offer potential insights.
Purpose of the Study:
- To review historical observations on hyperventilation and absence seizures.
- To elucidate the relationship between breathing and seizure provocation.
- To identify potential mechanisms linking respiration and absence epilepsy.
Main Methods:
- Literature review of historical and contemporary studies.
- Analysis of clinical observations regarding hyperventilation.
- Synthesis of data on breathing patterns and seizure occurrence.
Main Results:
- Hyperventilation consistently provokes absence seizures in susceptible individuals.
- Observations suggest a strong link between respiratory changes and seizure onset.
- Specific breathing patterns may influence seizure threshold.
Conclusions:
- Breathing plays a critical role in absence seizure precipitation.
- Further research into respiratory-neurological interactions is warranted.
- Understanding these mechanisms could lead to novel therapeutic strategies.
Related Concept Videos
01:25Hyperpnea and Hyperventilation
3.0K
Hyperventilation refers to a higher-than-normal rate and depth of breathing, often associated with anxiety attacks. This excessive breathing surpasses the body's need to expel CO2, leading to a condition known as hypocapnia - an unusually low level of carbon dioxide in the blood. Hypocapnia can constrict cerebral blood vessels, reducing blood flow to the brain, which may result in dizziness or fainting. Early signs include tingling and muscle spasms in the hands and face, caused by falling...
3.0K
01:13Seizures: Classification
1.7K
Epilepsy is primarily characterized by unpredictable seizures, either provoked by an identifiable factor, such as injury or illness, or unprovoked, occurring spontaneously without apparent cause.
Seizures are typically classified into two main categories: focal and generalized seizures.
Focal Seizures
Focal seizures originate from specific regions of the brain. These seizures are further sub-classified into two types:
Seizures are typically classified into two main categories: focal and generalized seizures.
Focal Seizures
Focal seizures originate from specific regions of the brain. These seizures are further sub-classified into two types:
1.7K
01:24Epilepsy and Seizures: Overview
1.4K
Epilepsy is a chronic neurological disease marked by recurrent, unpredictable seizures. These seizures are caused by abnormal electrical discharges in the brain, leading to behavior, sensation, or consciousness alterations. They can also cause transient impairment of awareness, interfering with daily activities.
Various factors can trigger epilepsy, including genetic factors, brain damage, metabolic causes, and unknown etiology. Diagnosis of epilepsy involves electroencephalography (EEG), which...
Various factors can trigger epilepsy, including genetic factors, brain damage, metabolic causes, and unknown etiology. Diagnosis of epilepsy involves electroencephalography (EEG), which...
1.4K
01:27Air-entraining Agents
293
Air-entraining agents improve the durability and workability of concrete in climates with frequent freezing and thawing. These agents prevent cracks by introducing small air bubbles into the mix, creating spaces accommodating water expansion when temperatures drop. The air-entraining agents lower the surface tension of water, forming stable, small air bubbles. This method is more effective than having accidental large voids, as the intentional, smaller, and evenly distributed air voids improve...
293
01:28Effects of Air-entrainment in Concrete
417
Air entrainment in concrete significantly enhances the material's durability, especially in environments subjected to freeze-thaw cycles. Introducing small air bubbles into the concrete mix acts as internal voids that accommodate the expansion of water when it freezes, thereby alleviating internal stress and preventing structural cracks. This function is crucial in climates with significant freezing and thawing, as it protects the concrete from repeated stresses that could lead to premature...
417
01:23Measurement of Air Content in Concrete
698
Air content measurement in concrete is critical for ensuring structural integrity and durability of concrete structures, especially in environments prone to severe weather conditions. Accurate air content analysis optimizes concrete's resistance to freeze-thaw cycles and enhances its workability and strength. Several methods are standardized under ASTM guidelines to measure the air content in fresh concrete, each suitable for different concrete types and conditions.
The pressure method,...
The pressure method,...
698