A study by the University of Glasgow explored aphantasia, a condition where individuals cannot visualise images in their mind.
Aphantasia, first noted by Francis Galton in the 1880s; the term "aphantasia" was coined in 2015 by neurologist Adam Zeman.
It affects about 2% of the population, with ongoing research needed to understand its causes and implications.
On the other end of the spectrum are individuals with hyperphantasia, who possess an exceptionally vivid imagination, often experiencing mental images as if they were real.
