First named in 1854, the Fusiform Gyrus is a brain-area found in hominoids (inc. humans), the function of which is not yet understood in detail.
“The fusiform gyrus, also known as the lateral occipitotemporal gyrus, is part of the temporal lobe and occipital lobe in Brodmann area 37. The fusiform gyrus is located between the lingual gyrus and parahippocampal gyrus above, and the inferior temporal gyrus below.
Though the functionality of the fusiform gyrus is not fully understood, it has been linked with various neural pathways related to recognition.”
source : Wikpedia
The area is known to be associated with 'recognition' in general - especially of colours, faces, words and 'categories'.
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