tarsal plate


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plate

 [plāt]
1. a flat stratum or layer.
2. dental plate; sometimes, by extension, incorrectly used to designate a complete denture.
3. a flat vessel, usually a petri dish, containing sterile solid medium for the culture of microorganisms.
4. to prepare a culture medium in a petri dish, or to inoculate such a medium with a bacterial culture.
axial plate primitive streak.
bite plate biteplate.
cortical plate a layer of compact bone overlying the spongiosa of the alveolar process on the vestibular and oral aspects of the mandible and maxilla.
deck plate roof plate.
dental plate a plate of acrylic resin, metal, or other material that is fitted to the shape of the mouth, and serves for the support of artificial teeth.
dorsal plate roof plate.
end plate see end plate.
epiphyseal plate the thin plate of cartilage between the epiphysis and the shaft of a long bone; it is the site of growth in length and is obliterated by epiphyseal closure.
equatorial plate the collection of chromosomes at the equator of the spindle in mitosis.
floor plate the unpaired ventral longitudinal zone of the neural tube; called also ventral plate.
foot plate footplate.
force plate force platform.
medullary plate neural plate.
muscle plate myotome (def. 2).
neural plate a thickened band of ectoderm in the midbody region of the developing embryo, which develops into the neural tube; called also medullary plate.
roof plate the unpaired dorsal longitudinal zone of the neural tube; called also dorsal plate and deck plate.
tarsal plate tarsus (def. 2).
ventral plate floor plate.

tarsal plate

n.
See tarsus.

tarsus 

Thin flat plate of dense connective tissue, situated one in each eyelid, which gives it shape and firmness. Each tarsus extends from the orbital septum to the eyelid margin. The upper tarsal plate, shaped like the letter D placed on its side, is much larger than the lower. Its width is 11mm in the centre whereas the corresponding measurement in the lower tarsus, which is somewhat oblong in form, is 5mm. Each tarsus is about 29mm long and 1mm thick. Within each tarsus are the meibomian glands, approximately 25 in the upper and 20 in the lower. Syn. tarsal plate. See palpebral ligament; orbital septum.
References in periodicals archive ?
Hughes flaps, also called tarsoconjunctival bridge flaps, advance the tarsal plate and conjunctiva from the ipsilateral upper eyelid to repair the defect in the lower eyelid (10,11).
Blunt dissection is carried deep to the orbicularis oculi muscle to the tarsal plate. Special attention is paid to staying at least 2 mm superior to the lid margin and centered just medial to the midpupillary position.
The findings on light microscopy of the eyelids in pachydermoperiostosis are thickening and sclerosis of the connective tissue between the orbicularis oculi muscle and the tarsal plate as well as a thickened tarsal plate due to meibomian gland hyperplasia and epidermalization of the conjunctival epithelium.
It is helpful to consider the eyelid as having an anterior and posterior portion; anteriorly consisting of the subcutaneous skin, eyelash and glands of Zeis and Moll; posteriorly, the tarsal conjunctiva and the tarsal plate housing the meibomian glands.
The two known causes of lower eyelid epiblepharon are inadequate lower lid retractor development, marked by the absence of adhesion to the skin, and a pretarsal orbicularis muscle inserted too closely to the lid margin; subsequently, the muscle and skin anterior to the tarsal plate are pushed forward over the tarsal plate, resulting in muscle and skin hypertrophy.
The lesion measured 1.0 x 1.5 cm, had distinct margins, and was firmly adherent to the tarsal plate. Pathology identified a sebaceous gland carcinoma (figure 1).
Superficial punctate keratitis was found in 8.33% cases on presentation however, tarsal plate thickening was along with SPKs was observed in 5% of cases.
Reports on keratinous cysts involving the tarsal plate are very rare.
Latent nystagmus has also been studied in animals reared with binocular lid suture without tarsal plate and those reared with prism glasses.
Practitioners tend to vary in where they apply a moistened Fluoret--for examination of the fit of gas permeable contact lenses, superior bulbar application may be preferred to introduce the dye behind the lens with the first blink, but for general use, applying the moistened Fluoret to the inferior tarsal plate avoids any potential unintentional conjunctival staining.
GPC is usually bilateral, but in approximately 10% of patients it is either unilateral or markedly asymmetric.Spring (1) became the first to report an allergic-like reaction on the upper tarsal plate in 78 of 170 wearers of soft contact lenses.
Levator palpebralis superior (LPS) muscle, which attaches to the upper tarsal plate by the lowest fibres of the levator aponeurosis (LA), is the major retractor of the upper eyelid.