Can you ever know too much about sporks? I would argue no. The rostral processes, according to John Moors of the blog My Adventures in Food, are the projections extending from the spork's cranium (yes, it has a cranium) that act functionally as teeth to impale foods. The dorsal carina is the ridge extending dorsally along the entire surface of the trunk. If none of this bores you, you should be wearing a spork T-shirt.
Related: Serious Eats HQ Gets New Sporks