Related Experiment Video
Updated: Jun 24, 2026
07:07
Inducing Post-Traumatic Epilepsy in a Mouse Model of Repetitive Diffuse Traumatic Brain Injury
Published on: February 10, 2020
Posttraumatic epilepsy: the roles of synaptic plasticity.
Igor Timofeev1, Maksim Bazhenov, Sinziana Avramescu
1Laval University, Medical School, Centre de Recherche, Université Laval Robert-Giffard, Québec, Canada. igor.timofeev@phs.ulaval.ca
Summary
Traumatic brain injury can trigger seizures, leading to epilepsy months later. Cortical isolation after trauma progressively increases network excitability, causing spontaneous seizures.
Area of Science:
- Neuroscience
- Epileptology
- Computational Biology
Background:
- Acute cerebral cortical trauma can cause temporary seizures.
- Epilepsy may develop months after the initial injury.
- The transition from acute seizures to chronic epilepsy is termed epileptogenesis.
Purpose of the Study:
- To explore the mechanisms underlying epileptogenesis after cortical trauma.
- To investigate how partial cortical isolation influences network dynamics.
- To elucidate the progressive changes leading to spontaneous seizures.
Main Methods:
- Review of morphological studies.
- Analysis of electrophysiological data.
- Application of computational modeling.
Main Results:
- Partial cortical isolation increases silent states in the cortical network.
- Neuronal connectivity and network excitability are enhanced.
- Progressive changes over weeks lead to epilepsy.
Conclusions:
- Partial cortical isolation is a key factor in epileptogenesis.
- Increased network excitability and connectivity contribute to epilepsy development.
- Understanding these progressive changes may inform future epilepsy treatments.
Related Concept Videos
01:24Epilepsy and Seizures: Overview
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...
01:32Postsynaptic Potential (PSP)
Postsynaptic potential (PSP) refers to a change in the electrical potential of a neuron when neurotransmitters released by presynaptic neurons bind to postsynaptic receptors. This potential can either be excitatory, leading to depolarization and ultimately action potential generation, or inhibitory, leading to hyperpolarization and suppression of the postsynaptic neuron.
There are two types of receptors: ionotropic and metabotropic.
The ionotropic receptor is the membrane protein that has an...
There are two types of receptors: ionotropic and metabotropic.
The ionotropic receptor is the membrane protein that has an...
01:35Long-term Potentiation
Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
01:25Long-term Potentiation
Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Hebbian LTP
LTP can occur when presynaptic neurons...
Hebbian LTP
LTP can occur when presynaptic neurons...
01:14Antiepileptic Drugs: Glutamate Antagonists
Glutamate is a fundamental neurotransmitter in the central nervous system, playing a vital role in neuronal communication and various cognitive processes. Glutamate stands as the principal excitatory neurotransmitter in the brain. Its presence is crucial for the communication between neurons, underpinning essential processes such as synaptic transmission, neuronal excitability, and plasticity. These functions are vital for higher-order cognitive processes, including learning and memory. The...
01:01Neuroplasticity
Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.