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INTRODUCTION. The paranasal sinuses (âthe sinusesâ) are air-filled cavities located within the bones of the face and around the nasal cavity and eyes. Each sinus is named for the bone in which it is located: Physiology.
Human sinuses are broken into four groups known collectively as the paranasal sinuses. These four groups are: maxillary, frontal, sphenoid and ethmoids. All four are located in the bones of our skulls, but they are also attached to the nose. When one of them becomes infected it can affect more than just the nasal passages. It can cause pain and swelling in the eyes, face, or jaw. For example, the maxillary sinuses; which are located beneath the eyes and also in the facial cheekbones on the side of the nose, can cause jaw pain when they become infected.