Opisthotonos
Definition Opisthotonos is an abnormal posturing condition characterized by rigidity and severe arching of the back, with the head thrown backwards. This is such that if a person were laid on his or her back, only the back of the head and the heels would touch the supporting surface.
Overview & Considerations
Opisthotonos may occur in meningitis in infants, and it is a sign of irritation of the membranes surrounding the brain and spinal cord (meninges). It may occur as a posture reflective of depressed brain function or injury to the nervous system.
Opisthotonos is much more common in infants and children than in adults. It is also more exaggerated in infants and children. This is a reflection of the relative immaturity of their nervous systems.
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