Periorbita
Periorbita
Periorbita (pronunciation: /ˌpɛriːˈɔːrbɪtə/) is a term used in anatomy to describe the thin membrane that lines the inside of the orbit and encloses the eye socket and its structures.
Etymology
The term "Periorbita" is derived from the Latin words 'peri' meaning 'around' and 'orbita' meaning 'eye socket'.
Description
The Periorbita, also known as the orbital periosteum, is a dense fibrous membrane that lines the bony orbit and extends into the eyelids as the tarsal plates. It is continuous with the dura mater of the brain at the optic canal and superior orbital fissure, and with the periosteum of the facial bones at the orbital margins.
Function
The main function of the Periorbita is to provide a protective layer for the structures within the orbit, including the eye, extraocular muscles, optic nerve, and blood vessels. It also serves as an attachment site for the extraocular muscles and contains openings for nerves and vessels to pass through.
Related Terms
- Orbit: The bony cavity in the skull that contains the eye.
- Optic Canal: A passage in the sphenoid bone of the skull through which the optic nerve passes.
- Superior Orbital Fissure: A gap or opening in the orbit, located between the lesser and greater wings of the sphenoid bone.
- Tarsal Plates: Dense connective tissue that gives the eyelids their form and rigidity.
- Dura Mater: The outermost of the three layers of the meninges surrounding the brain and spinal cord.
- Periosteum: A dense layer of vascular connective tissue enveloping the bones except at the surfaces of the joints.
External links
- Medical encyclopedia article on Periorbita
- Wikipedia's article - Periorbita
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