First named in 1854, the Fusiform Gyrus is a brain-area found in hominoids (inc. humans), the function of which is still mostly unknown.

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 : Wikipedia

As the quote above states, the area is currently thought to be associated with 'recognition' in general - especially of colours, faces, words and 'categories'.

Also see : Brodmann area 10plugin-autotooltip__plain plugin-autotooltip_bigBrodmann area 10

Brodmann area 10 (a.k.a. BA10, frontopolar prefrontal cortex, rostrolateral prefrontal cortex, or anterior prefrontal cortex) is a frontal lobe area in the human brain which has been found to be generally associated with working memory and multiple-task coordination. The area has also been implicated in 'decision making'.