Related Experiment Video
Updated: Jul 17, 2025
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
12.1K
On-demand low-frequency stimulation for seizure control: efficacy and behavioural implications
Enya Paschen1,2, Piret Kleis1,2, Diego M Vieira3
1Experimental Epilepsy Research, Department of Neurosurgery, Medical Center-University of Freiburg, Faculty of Medicine, Freiburg 79106, Germany.
Brain : a Journal of Neurology
|September 7, 2023
Summary
On-demand low-frequency stimulation (LFS) effectively controls seizures in epilepsy models with reduced stimulation. This novel approach in mesial temporal lobe epilepsy (MTLE) also shows no negative cognitive effects and may improve memory deficits.
Area of Science:
- Neuroscience
- Epilepsy Research
- Neuromodulation
Background:
- Mesial temporal lobe epilepsy (MTLE) is common, often drug-resistant, and linked to hippocampal sclerosis.
- Current deep brain stimulation for refractory epilepsy uses high frequencies, facing limitations like false detections and delayed intervention.
- Continuous low-frequency stimulation (LFS) shows promise in preclinical models, but reducing stimulation load is desirable.
Purpose of the Study:
- To develop and evaluate an on-demand LFS protocol for seizure control in a preclinical epilepsy model.
- To investigate the effects of hippocampal LFS on cognitive functions, including anxiety, memory, and spatial navigation.
- To compare the efficacy and stimulation load of on-demand LFS versus continuous LFS.
Main Methods:
- Utilized the intrahippocampal kainate mouse model, mimicking MTLE features like seizures and hippocampal sclerosis.
- Developed an online detection algorithm to identify epileptiform bursts and trigger hippocampal LFS.
- Assessed behavioral performance using tests for anxiety (light-dark box), memory (object location, novel object recognition), and spatial navigation (Barnes maze).
Main Results:
- On-demand LFS was nearly as effective as continuous LFS in preventing seizure clusters, with significantly lower stimulation.
- Epileptic mice exhibited increased anxiety and impaired spatial learning/memory compared to controls.
- Hippocampal LFS did not negatively impact cognition and even alleviated long-term memory deficits in epileptic mice.
Conclusions:
- On-demand hippocampal LFS presents a promising, less burdensome alternative for seizure control in focal epilepsy.
- This approach overcomes limitations of current high-frequency stimulation and does not impair cognitive functions.
- Further research into LFS for epilepsy treatment is warranted, potentially improving outcomes for drug-resistant patients.
More Related Videos
Related Concept Videos
01:30Electroconvulsive Therapy
68
Electroconvulsive therapy (ECT), or shock therapy, remains a critical biomedical intervention for severe, treatment-resistant depression. While its origins can be traced back to Hippocrates' observations that malaria-induced convulsions alleviated mental illness, modern ECT has evolved significantly from its earlier, more primitive applications. First introduced in 1938 by Ugo Cerletti and his colleagues, ECT involves inducing controlled seizures using electrical currents. In its early...
68
01:20Antiepileptic Drugs: Modulators of Neurotransmitter Release Mediated by SV2A Protein
339
Antiepileptic drugs, such as levetiracetam (Keppra) and brivaracetam (Briviact), have emerged as crucial tools in managing epilepsy. These medications exert their therapeutic effects by targeting the synaptic vesicle protein SV2A, a transmembrane glycoprotein primarily found in the brain.
SV2A is a transmembrane glycoprotein located predominantly in the brain, modulating the release of neurotransmitters for neuronal communication. Both levetiracetam and brivaracetam exhibit a high affinity for...
SV2A is a transmembrane glycoprotein located predominantly in the brain, modulating the release of neurotransmitters for neuronal communication. Both levetiracetam and brivaracetam exhibit a high affinity for...
339
01:24Arteries of the Lower Limbs
212
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...
212