Electrically Induced Limbic Seizures: Preliminary Findings in a Rodent Model
نویسندگان
چکیده
In epilepsy, novel pharmacological and nonpharmacological treatment approaches are commonly assessed in model systems of acute motor and often generalized seizures. We developed a rodent model with short-term electrical stimulation of the perforant path resulting in stereotyped limbic seizures. Limbic structures play a major role in human intractable epilepsy. In 10 rats, single electrical 5-second and 20-Hz stimuli to the perforant path reliably produced limbic seizures characterized by resting behavior and subtle motor signs. Electrophysiological recordings from the dentate gyrus demonstrated a seizure pattern with 4-Hz to 5-Hz discharges. Multiple inductions of seizures within 72 hours did not alter behavioral and electrophysiological seizure characteristics. Electrophysiological excitatory and inhibitory parameters assessed by evoked single and paired pulses did not change with increasing number of seizures. We present preliminary findings on a new model of electrically induced limbic seizures of mesiotemporal origin. This model may represent a reliable screening tool for new treatment approaches such as deep brain stimulation.
منابع مشابه
P119: Animal Models of Epilepsy: The Impact of some Chemoconvalsants on Animal Models
We summarize some of the most frequenthly used rodent animal models of temporal lobe epileps and the impact of chemoconvulsants on them. Temporal lobe epilepsy is the most common epilepsy in humans in which seizures spread to the neighboring cortiase and hippocampal neuron loss and other neuropathological take place. Temporal lobe epilepsy and the other form of epilepsy cannot acquired in chini...
متن کاملCreatine Revealed Anticonvulsant Properties on Chemically and Electrically Induced Seizures in Mice
Creatine exerts beneficial effects on a variety of pathologies in which energy metabolism and oxidative stress play an etiological role. Creatine supplements have shown beneficial effects on neurological disorders including Parkinson's disease, Huntington's disease, amyotrophic lateral sclerosis, Alzheimer's disease and stroke. However, the potential benefits of creatine for patients with convu...
متن کاملCreatine Revealed Anticonvulsant Properties on Chemically and Electrically Induced Seizures in Mice
Creatine exerts beneficial effects on a variety of pathologies in which energy metabolism and oxidative stress play an etiological role. Creatine supplements have shown beneficial effects on neurological disorders including Parkinson's disease, Huntington's disease, amyotrophic lateral sclerosis, Alzheimer's disease and stroke. However, the potential benefits of creatine for patients with convu...
متن کاملLimbic seizures induce P-glycoprotein in rodent brain: functional implications for pharmacoresistance.
The causes and mechanisms underlying multidrug resistance (MDR) in epilepsy are still elusive and may depend on inadequate drug concentration in crucial brain areas. We studied whether limbic seizures or anticonvulsant drug treatments in rodents enhance the brain expression of the MDR gene (mdr) encoding a permeability glycoprotein (P-gp) involved in MDR to various cancer chemotherapeutic agent...
متن کاملCortical deactivation induced by subcortical network dysfunction in limbic seizures.
Normal human consciousness may be impaired by two possible routes: direct reduced function in widespread cortical regions or indirect disruption of subcortical activating systems. The route through which temporal lobe limbic seizures impair consciousness is not known. We recently developed an animal model that, like human limbic seizures, exhibits neocortical deactivation including cortical slo...
متن کامل