You're looking up the code for congenital hydrocephalus in icd-10-cm so you can assign the code. you notice this note below the code: "excludes 1: acquired hydrocephalus." what does this note tell you?

a motor homunculus represents a map of brain areas dedicated to motor processing for different anatomical divisions of the body.

homunculus represents the importance of various parts of your body as seen by your brain. as a result, they take up a lot of brain space. although the cortical homunculus is a curiosity, penfield's work in mapping the brain's relationship to the body was invaluable.