What does stupor a lack of responsiveness and tendency to remain in fixed posture characterize?

Stupor is a state of reduced or absent responsiveness to external stimuli. It is characterized by a lack of voluntary movement and speech, and a tendency to remain in a fixed posture. Stupor can be caused by a variety of factors, including:

* Brain injury: Stupor can occur after a head injury, stroke, or other type of brain trauma.

* Drug overdose: Stupor can be a symptom of a drug overdose, especially opioids or sedatives.

* Metabolic disorders: Stupor can occur in people with low blood sugar, low oxygen levels, or other metabolic problems.

* Infections: Stupor can be a symptom of severe infections, such as meningitis or encephalitis.

* Psychiatric disorders: Stupor can occur in people with psychiatric disorders, such as schizophrenia or catatonia.

Stupor is a serious condition that requires medical attention. If you or someone you know is experiencing stupor, call 911 immediately.