Recent advances and trends in epilepsy imaging: pathogenesis and pathophysiology

Area of Science:

• Neurology
• Radiology
• Neuroscience

Background:

• Epilepsy is a common neurological disorder with significant morbidity and mortality.
• Neuroimaging offers insights into epilepsy's pathophysiology and etiology.
• Identifying underlying causes is crucial for effective management and potential surgical intervention.

Purpose of the Study:

• To review the role of neuroimaging in evaluating epilepsy.
• To highlight findings from MRI and PET in specific epilepsy types.
• To emphasize the importance of integrating imaging with clinical and EEG data.

Main Methods:

• Review of neuroimaging findings in epilepsy patients.
• Discussion of Magnetic Resonance Imaging (MRI) in febrile seizures and familial partial epilepsy.
• Overview of Positron Emission Tomography (PET) in assessing receptor binding.

Main Results:

• MRI can detect hippocampal injury and mesial temporal sclerosis, particularly after complex febrile seizures.
• Mesial temporal sclerosis may be present in familial partial seizures, suggesting multifactorial inheritance.
• PET studies show reduced serotonin and benzodiazepine receptor binding in some epilepsy cases, even with normal MRI.

Conclusions:

• Neuroimaging plays a vital role in epilepsy evaluation, complementing clinical and EEG data.
• Specific imaging techniques like MRI and PET can reveal underlying pathologies and potential epileptogenic mechanisms.
• An integrated, sequential approach to imaging is recommended for optimal epilepsy assessment.