The AchardCastaigne method, also known as the Suspected Pre-putrefactive Sagittal Cut, is a forensic technique utilized in post-mortem examinations. This method involves making an incision along the midline of the cranium to reveal the different brain structures for analysis. Synonymous terms for the AchardCastaigne method include Suspected Pre-putrefactive Sagittal Cut, AchardCastaigne technique, and Midline Craniotomy. These synonyms highlight the various ways this method is referred to in the field of forensics and pathology. Regardless of the term used, the purpose of this method remains consistent, focusing on gaining a better understanding of the brain's internal structures during post-mortem investigations.