This short animation covers a simplified version of the surgical decompression that is done in Chiari malformations. The surgical steps covered include: sub-occipital craniotomy followed by opening of dura and dural patch placement and finally closure. Timeline: 0:00 – Introduction 0:34 – Sub-occipital craniotomy 1:22 – Laminectomy 1:39 – Opening of dura 1:55 - Dural patch 2:11 – Summary