To be more specific, they found “clumps of greasy, matted hair inside, and a 3-centimetre-wide brain-like structure covered by a thin plate of skull bone,” New Scientist reported. In a case report published last week in the journal Neuropathology, the girl’s doctors explained that the structure turned out to be a cerebellum, the part of the brain that coordinates movement, and part of a brain stem, which connects the brain to the spine.