Hughlings Jackson and the dreamy state of temporal-lobe seizures.

John Hughlings Jackson, working at the National Hospital for Nervous Diseases at Queen Square, spent the 1870s and 1880s collecting a particular kind of case. The patients were unusual: their seizures arrived not as falls or convulsions but as sudden, intense floods of recognition. A scrap of music returning, intact, from childhood. A familiar room remembered too vividly. The unmistakable sense of having lived this exact moment before, sometimes accompanied by a feeling of doubled consciousness, as though the patient were watching themselves remember.

Jackson grouped these episodes under a single name, the dreamy state, and argued that they were the inaugural sign of a seizure originating in the temporal lobe. The 1888 paper in the journal Brain (an institution he had co-founded ten years earlier) presented one case in detail, a young patient he labelled simply Z., whose attacks began with a particular smell and a vivid sense of recollection before progressing to a generalised seizure. Jackson, working entirely without electroencephalography, inferred from this and similar cases that an entire region of the brain produced a recognisable family of subjective experiences when it discharged abnormally.

There is a dreamy state, which involves what Hughlings Jackson called reminiscence, a feeling that the present has been lived through before, sometimes attended by an intense familiarity in things or persons.summary of Jackson's framing, repeated in nearly every neurology textbook since

Seventy years later, Wilder Penfield at the Montreal Neurological Institute carried Jackson's clinical observation into the operating theatre. Penfield operated on conscious epilepsy patients to map cortical function before resecting an irritative focus, applying mild electrical stimulation directly to the exposed cortex while the patient reported what they felt. When his probe touched the lateral surface of the temporal lobe, patients reported what he came to call experiential responses: hearing a song unheard for decades, seeing a relative as a child, smelling a kitchen long since gone. The 1963 paper Penfield wrote with Phanor Perot reviewed five hundred and twenty such patients and confirmed that these responses were systematic, reproducible, and confined almost entirely to the temporal lobe.

The reminiscence aura that Jackson had described from the bedside was, in Penfield's hands, an event that could be evoked by a milliampere of current applied to specific tissue. Modern intracranial recordings have refined the picture further: hippocampal and parahippocampal structures are typically the seat of the discharge, mesial temporal sclerosis the most common pathology, and the aura is now understood as the conscious echo of a focal seizure that has not yet recruited enough cortex to interrupt motor control. The phenomenon is so robust that it is taught to first-year neurology trainees under almost the words Jackson used.

Less often discussed is what some patients learn to do with the aura. A subset, varying in size by series, describe an ability to interrupt the seizure in the few seconds the aura provides: by shifting attention to a strong external stimulus, by performing a particular cognitive task, or by rituals they have devised themselves. The published evidence for this attention-abort technique is small but consistent across decades, and it remains an open clinical question to what extent it can be taught rather than merely possessed.

Runaric inherits this lineage with a personal stake. The founder lives with temporal-lobe epilepsy and recognises Jackson's description from the inside; the axis Epilepsy is the attempt to read that cortical event from outside the person, with a wearable EEG, before it becomes a seizure, and to use the additional seconds the way a self-aware cortex already does. The aura is not a metaphor and not a mystery. It is a measurable cortical event whose first description is older than electroencephalography itself.