Which of the following is NOT a typical symptom of locked-in syndrome?

Locked-in syndrome is a rare neurological condition that results from damage to specific areas of the brainstem, usually causing complete paralysis of voluntary muscles except for eye movements. Patients typically retain full consciousness and cognitive function despite their inability to move or speak.

The correct answer identifies significant cognitive impairment as not being a typical symptom of locked-in syndrome. In contrast, individuals with this condition are often fully aware of their surroundings and can understand what is happening, maintaining their cognitive abilities. Their ability to communicate may be limited; however, many can still convey messages through eye movements or blinking.

The other symptoms are indeed characteristic of locked-in syndrome. Patients cannot move due to the paralysis caused by the syndrome and are also unable to speak because the muscles required for speech are affected. However, their mental faculties remain intact, allowing them to be alert and oriented, which is crucial for understanding their condition.