What anatomical area does "vestibule" usually refer to?

The term "vestibule" commonly refers to the entrance or a transitional area leading to a bodily cavity. In anatomy, it often denotes the space or area that serves as the entry point to various structures or systems within the body. For example, in the context of the ear, the vestibule is a part of the inner ear that serves as a central chamber for balance and spatial orientation. In the context of the mouth, it refers to the space between the gums and the inner lining of the lips and cheeks. This notion of vestibule as an entry point is consistent across various anatomical structures.

Options such as visual cortex, inner ear, or nasal passage refer to specific and distinct regions or functions within the body, rather than an entryway or transitional area, which reinforces the appropriateness of identifying vestibule with the concept of an entrance to a bodily cavity.