The term "vestibular" refers to the vestibular system, which is a sensory system located in the inner ear. This system is responsible for maintaining balance, spatial orientation, and coordinating movement. It detects changes in head position and motion, helping the body understand its position in relation to gravity. The vestibular system works closely with other sensory systems, such as vision and proprioception, to provide a comprehensive understanding of one's environment. It plays a crucial role in activities like walking, running, and even standing still, ensuring that we remain upright and stable while moving or at rest.