Aphantasia

Source: This post on Aphantasia has been created based on the article “Aphantasia: When some people cannot see in their mind “ published in Indian Express on 19th November 2024.

Why in news?

Recently, a study by University of Glasgow delved deeper into the connection between humans’ auditory and visual senses with regards to Aphantasia.

 About Aphantasia

1. Aphantasia is a condition where individuals have limited or no ability to form visual images in their mind.

For individuals with aphantasia, the “mind’s eye”, the mental faculty that allows most people to visualize objects, scenes, and people is effectively “blind.”

2. It is not classified as a disability but rather a variation in cognitive processing.

3. Origins: It was first noted by British polymath Francis Galton in the 1880s. The term “aphantasia” was coined in 2015 by neurologist Adam Zeman.

4. Characteristics: People with aphantasia cannot create mental images when imagining scenes, objects, or memories. For example, hearing the cry of a baby may not evoke a visual representation of a crying infant in their mind.

5. Connection Between Auditory and Visual Senses: Research shows that in individuals without aphantasia, auditory stimuli activate the brain’s visual cortex, creating mental imagery. This connection is less pronounced in individuals with aphantasia.

6. Prevalence: It affects approximately 2% of the population, although more research is needed for precise figures.

7. Possible Causes: The exact reasons for aphantasia remain unknown. Studies suggest differences in brain connectivity and activity patterns.

UPSC Syllabus: Science and technology