Cerebral oscillation syndrome due to traumatic brain injury Transient loss of consciousness occurs after a cerebral oscillation and is usually recovered within 30 minutes. Upon awakening, the patient cannot recall the scene of the injury or the moments before the injury. The patient may have headache, vomiting, vertigo, irritability, post-traumatic brain injury emotional instability, lack of confidence, inattention, and vegetative symptoms such as pale skin, cold sweats, decreased blood pressure, slow pulse, and shallow inspiration. Coma due to traumatic brain injury Coma can occur for a long time after traumatic brain injury, coma to return to the process of wakefulness, in between there can be lethargy, turbidity, delirium, etc.. Consciousness may fluctuate from light to heavy. Delirium due to traumatic brain injury Delirium is usually transferred from coma or lethargy. The behavior of some patients in delirium reflects pre-morbid occupational characteristics. Many patients are resistant, noisy, and uncooperative, while others are more aggressive. There may be terrifying hallucinations, and in severe cases, confused excitement and even strong impulsive violence. Delirium may be replaced by other disturbances of consciousness such as haziness and dreamlike states. Amnesic syndrome due to traumatic brain injury is characterized most notably by amnesia-based fictitiousness, and the patient is often easily agitated. Its duration is shorter than that of alcoholic amnesic syndrome. Subdural hematoma due to traumatic brain injury may occur soon after the injury, and headache and drowsiness are common. It is occasionally accompanied by delirious motor excitement, and about half of the patients have optic papillary edema. Chronic subdural hematomas are characterized by drowsiness, sluggishness, memory loss, and in severe cases, signs of generalized dementia. Some patients have mildly elevated cerebral crest fluid pressure, increased protein quantification, and a yellow appearance.