Use "involutions" in a sentence

1. Held together by hooks and Angulous involutions

2. The second layer, the Arachnoid mater, covers the brain and pia mater but does not follow the contour of the involutions of the brain

3. This Avowal does not deter him from pointing out (6) that the metafictional nature of the Quijote, with its ramifications, involutions, Chinese-box tales-within-tales and presence of author-as-personage within the text, curiously - and even if direct influence is impossible - …