Early Epilepsy Surgery

Modern epilepsy surgery is built on more than a century of attempts to identify where seizures begin and whether that tissue can be treated safely.

1886: Victor Horsley

The modern era of epilepsy surgery is usually traced to 1886, when British surgeon Sir Victor Horsley operated on patients whose focal seizures could be linked to identifiable cortical lesions. His work was strongly influenced by neurologist John Hughlings Jackson, who had argued that focal seizure symptoms could reveal where abnormal brain activity began.

Localising the seizure focus

Early surgery depended heavily on visible lesions, traumatic scars and seizure semiology. As cortical stimulation, EEG and later imaging developed, surgeons gained better tools for identifying seizure onset and mapping important brain functions.

Penfield, Jasper and the mid-twentieth century

Wilder Penfield and Herbert Jasper in Montreal helped establish a more systematic form of epilepsy surgery. Electrical stimulation of the exposed cortex allowed surgeons to map movement, sensation and language while also investigating seizure networks. EEG became increasingly important for reducing unsuccessful explorations and identifying temporal-lobe epilepsy.

What early surgery taught medicine

Epilepsy surgery contributed far beyond seizure treatment. Operations involving the temporal lobes helped reveal the role of the hippocampus and neighbouring structures in memory, and the field became central to modern neuropsychology.

Then and now

Today, epilepsy surgery is considered only after specialist assessment and may involve MRI, prolonged video-EEG, neuropsychology, functional imaging and sometimes invasive monitoring. The aim is still recognisably similar to the nineteenth-century idea: identify the seizure-generating region while protecting essential brain function — but the precision and evidence base are vastly greater.

Sources

The start and development of epilepsy surgery in Europe
Inspecting Resecting: 20-Year Trends in Epilepsy Surgery
Penfield, Gibbs, Bailey and the development of anterior temporal lobectomy