Recall your morning; imagine your breakfast in your mind\u2014for example, the unique pattern on your coffee mug. Most people can freely reconstruct these images in their heads, yet for about 4% of the population<\/b>, this is impossible. This phenomenon is called aphantasia<\/b>, a condition where an individual lacks the ability of visual imagery.<\/p>\n
The term “aphantasia” was coined in 2015 by neurologist Adam Zeman<\/b>. The research was prompted by a case where a patient lost his ability for visual imagination following heart surgery. Since then, thousands of people have reached out to scientists, reporting that they have never had the ability to visualize at any stage of their lives, believing that “seeing with the mind’s eye” was merely a metaphor.<\/p>\n
Traditionally, visual imagination is viewed as “reverse vision”<\/b>: during this process, brain regions send signals to the visual cortex<\/b> to create an image. However, research into individuals with aphantasia has revealed several paradoxes:<\/p>\n Unconscious Representations:<\/b> Studies show that in cases of aphantasia, the visual cortex still manages to form “sensory representations.” For instance, hearing a dog bark sends corresponding visual signals to the brain, but this process remains unconscious, and the individual cannot consciously visualize the images.<\/p>\n<\/li>\n High Cognitive Function:<\/b> Despite this, the brains of those with aphantasia function perfectly: they pass memory tests successfully, easily perform mental rotation<\/b> tasks, and often achieve great success in scientific or technical fields. This indicates that the brain can process information and solve cognitive tasks without the need for mental visual imagery.<\/p>\n<\/li>\n<\/ul>\n Aphantasia represents an “intriguing variation” of the human cognitive experience, which scientists study using several objective methods:<\/p>\n Pupillary Light Reflex:<\/b> In people with typical imagery, the pupils automatically constrict when imagining bright light, whereas in those with aphantasia, this reaction is significantly weaker or entirely absent.<\/p>\n<\/li>\n Binocular Rivalry:<\/b> This technique measures how prior mental visualization influences which image the eye actually perceives when presented with different stimuli.<\/p>\n<\/li>\n<\/ol>\n The study of this phenomenon will help scientists answer a fundamental question: what role does conscious imagination truly play in our emotional state, the stability of our memory, and our perception of the environment?<\/p>\n\n
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