Since Further research by Kanwisher et al (1999)

Since Kanwisher et al’s (1997) original study into the
FFA, there has been much research into the exclusiveness of the FFA and facial
perceptions. Kanwisher, Tong and Nakayama, (1998) concluded that with the use
of a fMRI that the FFA responds to faces. Further research by Kanwisher et al
(1999) tested whether the human FFA responds not only to faces but to anything
else, using fMRI the strongest responses were to stimuli containing faces,
results demonstrating that the FFA is selective for faces. A
magnetoencephalography study found that examples of pareidolia, evoked an early
activation in the FFA, at a time and location similar to that evoked by faces,
whereas other common objects do not evoke such activation, supporting the
exclusiveness of FFA and its role in facial perception (Hadjikhani et al, 2009). Puce et al (1996) again
using fMRI found that face stimuli evoked greater right hemispheric activation,
with characteristic patterns localised to FFS. Additional evidence for the
exclusiveness of FFA and facial information comes from (Tong et al., 2000), who discovered that
activation of the FFA also occurs for faces of cats, cartoons, as well as human
faces, and insignificant for non-face stimuli. A case study of C.K who suffered
from agnosia supports the theory of separate processes in identifying faces,
objects and places etc. He experienced extreme difficulty with basic level
object recognition, also body parts, but perfumed well at recognising faces,
providing evidence that the FFA is specialised for processing faces in a normal
orientation. Interestingly, it is found that there is stronger activity in the
FFA when a person sees a familiar face as opposed to an unfamiliar one (Weibert
& Andrews 2015).