<unk>  is an involuntary flexion or extension of the arms and legs, indicating severe brain injury. It occurs when one set of muscles becomes incapacitated while the opposing set is not, and an external stimulus such as pain causes the working set of muscles to contract. The<unk>  may also occur without a stimulus. Since<unk>  is an important indicator of the amount of damage that has occurred to the brain, it is used by medical professionals to measure the severity of a coma with the Glasgow Coma Scale (for adults) and the Pediatric Glasgow Coma Scale (for infants). The presence of<unk>  indicates a severe medical emergency requiring immediate medical attention. Decerebrate and decorticate<unk>  are strongly associated with poor outcome in a variety of conditions. For example, near-drowning victims that display decerebrate or decorticate<unk>  have worse outcomes than those that do not. Changes in the condition of the patient may cause alternation between different types of<unk> .
Abnormal posturing
Copropraxia
Dyskinesia
Metamorphopsia
Hemimotor neglect
Hyperreflexia
Diplophonia
Spasticity