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Hereditary prosopagnosia: the first case series
Martina Grueter1, Thomas Grueter, Vaughan Bell
1Institute of Human Genetics, Westfälische Wilhelms-University, Münster, Germany. mgrueter@comfood.com
Summary
Hereditary prosopagnosia, the inability to recognize faces, appears to be caused by a single gene mutation. This genetic condition runs in families, affecting both men and women across generations.
Area of Science:
- Neuroscience
- Genetics
- Cognitive Psychology
Background:
- Prosopagnosia is a visual agnosia characterized by impaired face recognition.
- Hereditary prosopagnosia suggests a genetic basis for face recognition abilities.
Purpose of the Study:
- To investigate the inheritance patterns of prosopagnosia within families.
- To provide evidence for a genetic contribution to face recognition.
Main Methods:
- Family pedigrees were analyzed for suspected hereditary prosopagnosia using a screening questionnaire.
- Affected individuals underwent cognitive testing, including face recognition and memory assessments.
Main Results:
- Seven pedigrees with 38 cases indicated autosomal dominant inheritance of prosopagnosia.
- Affected individuals performed significantly worse on face recognition tests compared to controls.
Conclusions:
- Face recognition ability has a significant genetic component, likely influenced by single gene mutations.
- These findings support the emerging field of cognitive neurogenetics.
Related Concept Videos
01:24Prosopagnosia
Prosopagnosia, also known as face blindness, is the inability to recognize faces. In severe cases, individuals with prosopagnosia may not recognize close family members, including parents and spouses, by their faces. For instance, someone with prosopagnosia might walk past their child in a crowd, only realizing their mistake upon noticing their child's distinctive backpack or favorite jacket. Prosopagnosia specifically impairs facial recognition, while the recognition of other objects or...
01:12Visual Agnosia
Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round end"...