pyramidal vs. extrapyramidal

pyramidal

[ pi-ram-i-dl ]show ipa

adjective

1. of, relating to, or shaped like a pyramid: the pyramidal form.
2. of the nature of a pyramid; pyramidlike.

extrapyramidal

[ ek-struh-pi-ram-i-dl ]show ipa

adjective

1. pertaining to or involving nerve tracts other than the pyramidal tracts, especially the corpus striatum and its associated structures.
2. located outside the pyramidal tracts.