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2. Mantrap (access control) - Wikipedia

   en.wikipedia.org/wiki/Mantrap_(access_control)

   Mantrap (access control) A mantrap, security mantrap portal, airlock, sally port or access control vestibule is a physical security access control system comprising a small space with two sets of interlocking doors, such that the first set of doors must close before the second set opens. [1] [2] [3] Airlocks have a very similar design, allowing ...

3. Access control - Wikipedia

   en.wikipedia.org/wiki/Access_control

   In physical security and information security, access control ( AC) is the selective restriction of access to a place or other resource, while access management describes the process. The act of accessing may mean consuming, entering, or using. Permission to access a resource is called authorization .

4. Vertigo: Causes, Symptoms, and Treatment - WebMD

   www.webmd.com/brain/vertigo-symptoms-causes...

   WebMD explains the causes, symptoms, and treatment of vertigo, a sensation of spinning that is related to problems with the inner ear.

5. Vestibular Disorders: Symptoms, Causes and Treatments - WebMD

   www.webmd.com/brain/vestibular-disorders-facts

   Vestibular Disorder: If you have vertigo or trouble hearing, your body's balance system might not be in the correct condition.

6. Vestibular system - Wikipedia

   en.wikipedia.org/wiki/Vestibular_system

   Neural pathway of vestibular/balance system. The vestibular system, in vertebrates, is a sensory system that creates the sense of balance and spatial orientation for the purpose of coordinating movement with balance. Together with the cochlea, a part of the auditory system, it constitutes the labyrinth of the inner ear in most mammals .

7. Inner and Middle Ear Anatomy, Diagram & Function | Body Maps

   www.healthline.com/human-body-maps/ear-inner-and...

   The inner ear is also responsible for helping maintain balance. Sensory structures within the vestibule and semicircular canals control this. The vestibule contains two sacs, the utricle and the ...

8. Vertigo: Symptoms, Causes, Treatment, and More - Healthline

   www.healthline.com/health/vertigo

   Vertigo is the feeling that you’re moving when you’re not. The most common causes are benign paroxysmal positional vertigo and Meniere’s disease.

9. Vestibule (architecture) - Wikipedia

   en.wikipedia.org/wiki/Vestibule_(architecture)

   Vestibule (architecture) A vestibule (also anteroom, antechamber, or foyer) is a small room leading into a larger space [1] such as a lobby, entrance hall, or passage, for the purpose of waiting, withholding the larger space from view, reducing heat loss, providing storage space for outdoor clothing, etc. The term applies to structures in both ...