What is the primary purpose of using MEG in clinical settings?

Using Magnetoencephalography (MEG) in clinical settings primarily focuses on detecting and localizing epileptiform activity. MEG is a neuroimaging technique that measures the magnetic fields produced by neuronal activity, allowing for high temporal and spatial resolution in mapping brain function.

In the context of epilepsy, MEG is particularly valuable for identifying the precise origin of seizure activity in the brain, which is crucial for treatment planning, including surgical options. By pinpointing areas where abnormal electrical discharges occur, clinicians can better understand the patient's condition and devise appropriate interventions.

Other options, while related to brain activity and function, do not specifically highlight MEG's primary strength in the clinical realm. For instance, real-time imaging is a feature associated with techniques like fMRI or EEG, blood flow measurement typically pertains to PET scans, and cognitive evaluation often involves neuropsychological tests rather than direct imaging of brain activity.