Congenital Prosopagnosia without Object Agnosia? A Literature Review

2017-10-17T20:13:30Z (GMT) by Jacob Geskin Marlene Behrmann
<div>One of the longstanding controversies in the neuropsychology literature concerns the functional organization of high-level vision, and the extent to which</div><div>the recognition of different classes of visual stimuli engage a single or multiple, independent underlying mechanisms. We explore this issue in the context</div><div>of congenital prosopagnosia (CP), a neurodevelopmental disorder in which individuals, without a history of brain damage and with normal sensory and</div><div>cognitive abilities, are impaired at face recognition. Whereas many researchers have asserted that individuals with CP have face-selective deficits, others</div><div>have claimed that the deficit extends to the recognition of stimuli from other visual classes as well. This paper reviews 119 published reports of CP (a</div><div>total of 716 cases) from 1976 to 2016, and examines the evidence for associations or dissociations of face and object recognition behavior. The results</div><div>revealed that, of the 238 CP cases with data permitting a satisfactory evaluation of behavior, 80.3% had an associated face and object recognition deficit</div><div>whereas 19.7% evinced a dissociation between face and object recognition. We evaluate the strength of the evidence and correlate the face and object</div><div>recognition behavior where possible. We discuss the frequent pattern of an association between face and object recognition deficits along with the less</div><div>frequent case of dissociation, consider the implications for theories of functional organization of the visual system, and make suggestions for further</div><div>adjudication of the relationship between face and object recognition in prosopagnosia and object agnosia.</div>