Agnosia

[Oralee]

Inability to interpret sensations and hence to recognize things, typically as a result of brain damage.

[Dorothey Allen]

Agnosia is inability to identify an object using one or more of the senses. Diagnosis is clinical, often including neuropsychologic testing, with brain imaging (eg, CT, MRI) to identify the cause. Prognosis depends on the nature and extent of damage and patient age. There is no specific treatment, but speech and occupational therapy may help patients compensate.
Agnosias are uncommon.