In acquired prosopagnosia (AP) a mature, fully functional face recognition system is disturbed by an external event, unrelated to the system's past performance.
However, in contrast to the acquired form, individuals with congenital prosopagnosia never evolve a functional face recognition system in the first place and their deficit has to be interpreted as an endpoint of a developmental trajectory [72], a mature but dysfunctional system.
Thus, while AP is caused by damaging a mature, functional system of face recognition, individuals with CP never evolve a fully functional face recognition system in the first place.
Evidence that the FFA is important for face recognition is evident in studies using functional magnetic resonance (fMR -adaptation, which have shown a reduced response (adaptation) to repeated images ofMR -adaptation (Grill-Spector et al. 1999; Andrewhichd Ewbank 2004; Loffler et al. 2005; Rotshaven et al. 2005; Yovel and Kanwishown2005).
From theoretical modeling, it is estimated that a device with approximately 1000 electrodes could give good functional vision, i.e., face recognition and reading ability.
In this study, polynomial-based radial basis function neural networks are proposed as one of the functional components of the overall face recognition system.
Irrespective of the exact processes underlying functional specialization of cortical regions in the neural system of face recognition, this specialization presumably leads to an alignment between cortical location and functional process [67] [70].
Irrespective of the exact developmental processes underlying the subsequent functional specialization of cortical regions into a mature neural system for face recognition [61] [63], this specialization presumably leads to an alignment between cortical location and functional process [52], [64] [66].
This symptomatic categorization of deficits parallels a functional modularization proposed in conceptual models of intact face recognition [50] [53], and it aligns with the location of underlying cortical lesions roughly along a caudal-rostral axis [5], [6], [49].
Parr and colleagues [27] recently conducted a functional neuroimaging study of chimpanzees to examine their neural activity for face recognition using positron emission tomography (PET).
It will be interesting to investigate how these structural differences relate to functional responses in developmental prosopagnosics and how they relate to specific computations necessary for face recognition.
