What is a tarsal plate?
What is a tarsal plate?
The tarsal plates of the eye are formed by dense fibrous tissue representing thickened extensions of the orbital septum, molded to the curvature of the eyeball. Each eye has a superior tarsal plate and an inferior tarsal plate. The plates anchor the roots of the eyelashes and contain tarsal (Meibomian) glands.
Where are the tarsal plates?
The tarsal plates are located deep to the palpebral region of the orbicularis oculi muscle. There are two plates; the superior tarsus (upper eyelid) and inferior tarsus (lower eyelid). They act to form the scaffolding of the eyelid, and are composed of dense connective tissue.
What is the eyelid called?
palpebra
Eyelid: The lid or cover of the eye, a movable fold of skin and muscle that can be closed over the eyeball or opened at will. Each eye has an upper and a lower lid. Also known as a palpebra.
What is the bottom part of your eyelid called?
The lower eyelid is formed by three lamellae: the anterior, middle, and posterior lamella. The anterior lamella is the skin and orbicularis oculi muscle, the middle lamella is the tarsal plate and orbital septum, and the posterior lamella is the conjunctiva and the lower lid retractors.
What is tarsal plate sparing?
Tarsal plate sparing is due to an anatomic structure called the orbital septum, which limits extravasation of blood beyond the tarsal plate (Figure 2). Indirect radiographic findings that suggest BSF include pneumocephalus and air-fluid levels within, or opacification of, an air sinus.
What is the eyeball?
eyeball, spheroidal structure containing sense receptors for vision, found in all vertebrates and constructed much like a simple camera. Much of the eyeball is filled with a transparent gel-like material, called the vitreous humour, that helps to maintain the spheroidal shape.
What is inside your eyeball?
Most of the eye is filled with a clear gel called the vitreous. Light projects through your pupil and lens to the back of the eye. The inside lining of the eye is covered by special light-sensing cells that are collectively called the retina. Behind the eye, your optic nerve carries these impulses to the brain.
Where are tarsal bones?
The tarsal bones consist of seven short bones located at the proximal region of the foot. They are arranged in proximal and distal rows. 1. Calcaneus bone: The largest tarsal bone that projects posteriorly as the heel.
What is the common name for tarsus?
The tarsal bones (also known as the tarsus, Latin: ossa tarsi) form a group of seven articulating bones in the foot located between the bones of the lower leg (tibia, fibula) and the metatarsal bones of the foot.
What is bruising behind the ear called?
Battle’s sign is a crescent-shaped bruise that appears behind one or both ears. It was named after an English surgeon, Dr. William Henry Battle, and can be an indication of a serious head injury. The skull is made up of more than 20 different bones.
