Agnosia has been found to have many causes. For several types of agnosia, including prosopagnosia (an inability to recognize faces) and color agnosia, articles in the medical literature describe families in which multiple relatives have similar symptoms. The authors of these articles suggest this is evidence of a genetic factor contributing to agnosia in these families. However, a specific gene has not yet been found to cause this condition.
Last updated: 2/26/2015
We hope this information is helpful. We strongly recommend you discuss this information with your doctor. If you still have questions, please
Duchaine B, Germine L, Nakayama K. Family resemblance: ten family members with prosopagnosia and within-class object agnosia. Cognitive Neuropsychology. 2007; 24(4):419-430. http://www.ncbi.nlm.nih.gov/pubmed/18416499. Accessed 2/26/2015.