Afantazi

Aphantasia (eng. Aphantasia) is a cognitive difference characterized by the inability to mentally generate visual images. The term was first introduced in 2015 by Adam Zeman and colleagues to describe the complete absence of visual imagery^【1】. The word “phantasia,” of Greek origin, refers to Aristotle’s concept of mental images; the prefix “a-” denotes the absence of this capacity.

History

The variation in individuals’ ability to form mental images was first systematically studied by Sir Francis Galton in 1880^【2】. Galton’s “breakfast-table questionnaire” revealed that some individuals were unable to generate any mental visual imagery whatsoever^【3】. However, the term “aphantasia” was the first to clearly define this condition and has since spurred increased scientific interest in the field.

Types

1. Congenital Aphantasia: Characterized by a lifelong inability to generate mental visual images. Individuals with this type often only become aware of their condition upon learning that others possess the ability to visualize^【4】.
2. Acquired Aphantasia: Can develop later in life due to neurological or psychiatric causes. For example, patient MX, who lost the ability to mentally visualize following heart surgery, is a case of this type^【5】.
3. Psychogenic Aphantasia: May arise from psychological rather than neurological causes; it has been suggested to be associated with depersonalization disorder^【6】.

Neurological Basis

Mental imagery arises from interactions among the frontal, parietal, temporal, and occipital regions of the brain. Aphantasia is linked to disruptions in the functional connectivity between these areas^【7】. In the case of patient MX, normal activation was observed during visual perception of faces, but no such activation occurred when attempting to mentally visualize faces; instead, hyperactivity was detected in the anterior cingulate gyrus^【8】.

Imagination and Creativity (Generated by Artificial Intelligence)

Cognitive and Emotional Characteristics

• Memory: Individuals with aphantasia report weaknesses in autobiographical memory; they typically recall personal events as narratives, with diminished visual or emotional vividness^【9】.
• Emotion Regulation: The absence of visual imagery may lead to reduced emotional responses to feelings such as nostalgia or fear. This can result in fewer traumatic recollections for some individuals^【10】.
• Face Recognition (Prosopagnosia): Difficulty recognizing faces is frequently reported among individuals with congenital aphantasia^【11】.
• Spatial Memory: While the recall of visual details may be impaired, spatial relationships such as object locations often remain intact. Individuals with aphantasia tend to rely on verbal descriptions and positional cues to reconstruct environments^【12】.

Epidemiology

Various studies suggest that aphantasia affects approximately 2% to 3% of the population^{【13】【14】}. However, this figure may vary due to undiagnosed cases, as some individuals may assume their subjective mental experience is normal.

Distinction Between Imagery and Creativity

Aphantasia does not imply a lack of creativity. Many individuals without visual imagery are highly engaged in creative activities such as writing novels or working in visual arts^【15】. These individuals typically reconstruct mental scenes through verbal or conceptual means rather than visual ones.