Forensic Medicine Toxicology - 2 4e62c304 Cause(s) of Ophisthotonus is/are: A Cocaine B Strychnos Nux Vomica seed C Codeine D Curare High-Yield Explanation TONUS SEEN IN STRYCHNOS NUX VOMICA / KUCHILA : OpisthotonusQ - Backward bending of spine. emprosthotonusQ - Forward flexion of spine. pleurosthotonusQ - Lateral flexion of spine.