Geek
The word geek is a slang term originally used to describe eccentric or non-mainstream people; in current use, the word typically connotes an expert or enthusiast or a person obsessed with a hobby or intellectual pursuit, with a general pejorative meaning of a "peculiar or otherwise dislikable person, esp[ecially] one who is perceived to be overly intellectual".
Although often considered as a pejorative, the term is also used self-referentially without malice or as a source of pride. Its meaning has evolved to connote "someone who is interested in a subject (usually intellectual or complex) for its own sake".
Nerves?
Biology Anatomy Nerves Geek
okay so ive been trying to upload for like three hours..... eventually i am too lazy to redraw...