More than six years after suffering a major seizure that left her hospitalized and with significant memory loss, Claire Barnard’s experience highlights challenges in diagnosing epilepsy in adults. Barnard, a 47-year-old mother of three from Buckinghamshire, had been healthy and physically active before her symptoms emerged.

Beginning in late 2018, when she was 45, Barnard started experiencing brief episodes lasting about ten seconds, characterized by unusual sensations of warmth and nausea rising from her stomach to her head. Despite these warning signs, neither she nor her doctors initially identified the cause. Various medical evaluations, including heart tests and scans, found no abnormalities, and her symptoms were attributed to menopausal hot flushes, though she was undergoing hormone replacement therapy and had not experienced such symptoms previously.

The situation escalated in April 2020 when Barnard collapsed, injuring herself, followed two months later by a severe seizure that resulted in hospitalization at King’s College Hospital in London. Due to COVID-19 restrictions at the time, her family was unable to be with her during treatment. Upon regaining consciousness, Barnard was disoriented and found that she had lost memory of events spanning four to six years prior to the seizure, including family milestones and work commitments.

After further testing, Barnard was diagnosed with temporal lobe epilepsy, a neurological disorder affecting brain regions responsible for memory. Professor Tony Marson, an epilepsy specialist at The Walton Centre NHS Foundation Trust in Liverpool, noted that memory impairment is common among patients with this form of epilepsy. Barnard had no previous family history of the condition and was unaware that epilepsy could develop suddenly in middle age.

Dr. Felix Chan, a neuroscientist at the University of Birmingham, described Barnard’s type of epilepsy as idiopathic, indicating no identifiable underlying cause. Such cases account for about one-third of adult epilepsy diagnoses, raising ongoing questions about why the condition emerges in otherwise healthy adults.

Despite the diagnosis, Barnard returned to work promptly, driven by financial concerns after her husband took voluntary redundancy. She concealed the extent of her memory difficulties while relearning skills such as using her laptop and recovering forgotten passwords. Her children played a crucial role in helping her reconstruct lost memories by sharing stories and photographs.

Barnard’s case sheds light on a broader trend: more adults are being diagnosed with epilepsy than children, with roughly 28,000 new diagnoses annually in the UK, about 80 per day. Notably, one in four new diagnoses occurs in individuals over the age of 65. The growing recognition of adult-onset epilepsy has prompted research into its causes and progression.

Several public figures have also lived with epilepsy, some diagnosed in adulthood. Musician and actor Martin Kemp developed epilepsy at 34 following brain surgery, crediting his recovery in part to family support. Comedian Rik Mayall acquired the condition at 40 after a traumatic accident. Other notable individuals include singer Prince, who had childhood seizures, and Susan Boyle, who was diagnosed in her youth. Some cases, such as that of actor Cameron Boyce, who died from sudden unexpected death in epilepsy at 20, underscore the condition’s potential severity.

Epilepsy remains one of the oldest recorded neurological disorders, with the earliest known reference dating back to a Babylonian tablet from around 2000 BCE. For those seeking more information, organizations such as the Epilepsy Society provide resources and support.