agnosia

n. inability or impaired ability to use the senses to recognize objects (Psychology)

Agnosia (a-gnosis, "non-knowledge", or loss of knowledge) is a loss of ability to recognize objects, persons, sounds, shapes, or smells while the specific sense is not defective nor is there any significant memory loss. It is usually associated with brain injury or neurological illness, particularly after damage to the temporal lobe.
See more at Wikipedia.org...

Agnosia /ag·no·sia/ inability to recognize the import of sensory impressions; the varieties correspond with several senses and are distinguished as [more]Agnosia - Community and Resources

Noun
1. inability to recognize objects by use of the senses
(hypernym) brain disorder, encephalopathy, brain disease
(hyponym) astereognosis, tactile agnosia

n. agnosia, inability or impaired ability to use the senses to recognize objects (Psychology)