A nurse is caring for a client who has acute respiratory distress syndrome (ARDS) and requires mechanical ventilation. The client receives a prescription for pancuronium. The nurse recognizes that this medication is for which of the following purposes?

Choice A reason: Flexing the upper and extending the lower extremities in response to the painful stimulus is not an expected response for a client who has a traumatic head injury. This is a sign of decorticate posturing, which indicates damage to the cerebral hemispheres or the internal capsule. Decorticate posturing is a type of abnormal flexion that involves the abduction of the arms, internal rotation of the shoulders, flexion of the wrists, and extension of the legs.

Choice B reason: Pushing the painful stimulus away is not an expected response for a client who has a traumatic head injury. This is a sign of normal motor function, which indicates that the client can localize and withdraw from the painful stimulus. This is the highest level of motor response on the Glasgow Coma Scale (GCS), which is a neurological scoring system used to assess conscious level after head injury.

Choice C reason: Extending the body toward the painful stimulus is an expected response for a client who has a traumatic head injury. This is a sign of decerebrate posturing, which indicates damage to the brainstem or midbrain. Decerebrate posturing is a type of abnormal extension that involves the abduction of the arms, external rotation of the shoulders, extension of the wrists, and extension of the legs.

Choice D reason: Showing no reaction to the painful stimulus is not an expected response for a client who has a traumatic head injury. This is a sign of flaccid paralysis, which indicates damage to the spinal cord or peripheral nerves. Flaccid paralysis is a type of complete loss of muscle tone and reflexes that involves the absence of any voluntary or involuntary movements.

Choice A reason: A stroke involving the right cerebral hemisphere can affect the cognitive and emotional functions of the brain, such as judgment, impulse control, and emotional regulation³. This can lead to risky or inappropriate behaviors, such as acting impulsively or disregarding social norms. Therefore, the nurse should monitor the client for poor impulse control and provide appropriate interventions, such as education, cueing, feedback, and environmental modifications.
Choice B reason: A stroke involving the right cerebral hemisphere can affect the visual functions of the brain, such as depth perception, spatial orientation, and visual recognition³. However, the deficits are usually in the left visual field, not the right, because the right side of the brain controls the left side of the body and the environment. Therefore, the nurse should monitor the client for deficits in the left visual field, not the right.
Choice C reason: A stroke involving the right cerebral hemisphere can affect the abstract reasoning functions of the brain, such as understanding metaphors, humor, or sarcasm. However, the ability to discriminate words and letters is more related to the language functions of the brain, which are mainly controlled by the left cerebral hemisphere. Therefore, the nurse should monitor the client for language deficits, such as aphasia or dysarthria, if the stroke involves the left cerebral hemisphere, not the right.
Choice D reason: A stroke involving the right cerebral hemisphere can affect the motor functions of the brain, such as movement, coordination, and balance³. However, the motor retardation, which is a slowing down of physical and mental activity, is more related to the mood functions of the brain, which are mainly controlled by the frontal lobe of the brain. Therefore, the nurse should monitor the client for motor retardation if the stroke involves the frontal lobe, not the right cerebral hemisphere.