Journalist Katie Couric recently experienced a frightening episode of transient global amnesia (TGA) during the Aspen Ideas Festival in Colorado. The sudden bout of memory loss left her unable to recall the current month, year, or the sitting U.S. president, initially believing it to be 2024 and that Joe Biden was in office.
Couric detailed the event in a post on Substack, describing how the episode occurred while she was attending the festival. She participated in two public panels, one on AI and another on journalism, but has no memory of either event or the time immediately following them. Her husband, John Molner, who was present, noticed that Couric was not herself. He reported that when he reached her, an EMT and a doctor were attending to her. He described her as "definitely not all there," and while altitude sickness was considered, her condition prompted medical evaluation.
At the hospital, Couric's disorientation became more apparent as she struggled to recall the year, the president, and even her grandchildren's names. Doctors conducted an MRI to rule out a stroke, which thankfully revealed no signs of one. However, Molner noted that her "fog" persisted, leading her to repeatedly ask the same questions about her surroundings and why she was at the hospital.
Couric was ultimately diagnosed with TGA, a temporary condition characterized by sudden memory loss that prevents the formation of new memories and can erase recent ones. According to the Mayo Clinic, TGA is not caused by a stroke, seizure, or head injury, and symptoms typically resolve within 24 hours. Molner described it as a "very weird neural episode that’s pretty uncommon and, at least in most cases, is a ‘one and done’ experience."
By approximately 9 p.m. that evening, Couric reported feeling like her usual self, and she went to sleep around 2 a.m. The episode, however, left a "permanent gap in memory" for the duration of the event and for several hours beforehand. Couric stated that the period from around noon until at least 7 p.m. on that Saturday in June remains a "big, black hole" in her recollection.
Data indicates that TGA affects about three to eight people per 100,000, with individuals aged 50 and older being at a higher risk. The precise cause of TGA is not fully understood, but experts suggest it may involve temporary dysfunction in the brain's hippocampus, the region responsible for memory formation. This dysfunction could be linked to brief interruptions in blood or oxygen flow, or minor spasms in blood vessels. Potential triggers for TGA episodes can include intense physical exertion, emotional distress, extreme temperature changes, or migraines.
While Couric expressed relief that the incident was not more serious, she acknowledged the unsettling nature of losing several hours of her memory. Medical professionals advise seeking immediate medical attention or calling 911 for anyone experiencing sudden memory loss, confusion, difficulty speaking, or other stroke-like symptoms.