Final answer:
The sensation of feeling oneself or the room spinning is known as vertigo, unlike orthostatic hypotension, which involves dizziness due to a sudden drop in blood pressure when standing.
Step-by-step explanation:
A patient's feeling of spinning or the room spinning is called vertigo. This sensation occurs when there is a perceived sense of motion either of oneself or the surrounding environment. It can result from a disturbance in the balance organs of the inner ear or in the structures of the brain that process the sensory information about balance and movement. In contrast, orthostatic hypotension is a condition where there is a sudden drop in blood pressure upon standing, leading to symptoms like dizziness, lightheadedness, or even fainting. However, it does not involve the same spinning sensation associated with vertigo.