Emergency Medical Technician (EMT) Intermediate Practice Exam

Decerebrate posturing is characterized by what type of movement?

1. Flexion of the arms and legs

2. Extension of the arms and legs

3. Spasmodic jerking movements

4. Curled posture

The correct answer is: Extension of the arms and legs

Decerebrate posturing is specifically characterized by the extension of the arms and legs. This posturing often indicates severe brain injury, particularly involving the brainstem, and is notable for the rigidity and abduction of the upper limbs along with the extension of the limbs and neck. It is an abnormal response that typically occurs when there is damage to the pathways in the brain, affecting motor control. The other types of movement associated with the options provided involve different responses: flexion of the arms and legs is linked to decorticate posturing, which suggests less severe brain impairment. Spasmodic jerking movements would be indicative of seizures or other involuntary muscle contractions. A curled posture may refer to a more relaxed state or other conditions but does not reflect decerebrate posturing. Understanding decerebrate posturing is crucial in trauma assessment, as it allows healthcare providers to gauge the level of neurological impairment and urgency of care needed.