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43 Cards in this Set
- Front
- Back
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The first body hairs produced during embryologic development
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Eyebrows
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Name the muscles located in the forehead
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Frontalis
Procerus Corrugator Supercilliaris Orbicularis Oculi All Produce Eyebrow Movement All are innervated by CNVII |
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Raise your eyebrows.....What muscle are you using to do this?
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Frontalis
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Concentrate really hard at something moving your eyebrows medially or towards your nose....What muscle are you using to do this?
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Corrugator Supercilliaris
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Now put on a face of aggression...Argggh! What muscle is causing your eyebrows to move the medial portion of your eyebrows down and gives nasal wrinkles.......Give up?
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Procerus
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The medial canthus is separated from the globe by the lacrimal lake what is the name of the floor of this lake? And what is the small pink mass located medial to this?
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Plica Semilunaris
Caruncle which contains goblet cells and fine hairs |
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What is the name of the furrow that separates the tarsal portion and orbital portion of the upper eyelid?
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Palpebral Sulcus
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Where does the lower eyelids orbital portion end?
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Past the inferior orbital margin to the nasojugal sulcus and malar sulcus
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Does the upper or lower eyelid have more lashes (cilia)? How long does it take a replacement lash to grow?
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150 in upper and 75 in lower
It takes 10 weeks to grow to full size! |
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Name the two unique sections of the Palpebral portion of the obicularis oculi?
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Muscle of Horner - encircles the lacrimal canaliculi
Muscle of Riolan - lies near the lid margin on both sides of the meibomian gland openings... It maintains the lid margins close to the globe.1 |
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What are the actions of the palpebral portion of the obicularis oculi versus the orbital portion of the muscle?
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The palpebral portion is involved in involuntary blink and voluntary winks.
The orbital portion is used to shut the eye tightly like after injury or against ocular pain. |
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What is the antagonist muscle to the palpebral portion of the obicularis oculi?
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Levator muscle
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What is the antagonist muscle to the orbital portion of the obicularis oculi?
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Frontalis Muscle
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What is the action of the levator muscle? What nerve innervates this muscle?
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Elevation of the eyelid
The Superior division of the CNIII Oculomotor Nerve |
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What muscle retracts the lower lid???
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The Capsulopalpebral fascia or lower eyelid aponeurosis.
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When you open your eyes and look realllly surprised what muscles are you using?
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Levator
Tarsal Muscles (Muscles of Muller) - gives 2mm additional lid elevation. |
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Each eyelid has a tarsal plate right... well what is the name of the bands of dense connective tissue that connect the plates to the orbital rim?
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Medial and Lateral palpebral ligaments
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What are the glands that secrete the outer lipid layer of the tear film?
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Meibommian Glands- large sebaceous glands embedded in the tarsal plate
These are also known as holocrine glands which means their secretion is produced by decomposition of the entire cell. |
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What glands secrete sebum into the hair follicle of the cilia coating the eyelash shaft?
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Sebaceous glands of Zeis
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What is the name of the modified sweat gland located near the lid margin that empty into the zeis gland duct?
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Glands of Moll
These are also known as apocrine glands which means its secretion is composed not of the whole cell but parts of the cellular cytoplasm. |
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What glands are located along the orbital border of the tarsal plate? These contribute to the aqueous layer of the tear film but are less numerous.
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Accessory Lacrimal Glands of Wolfring
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What glands are located in the stroma of the conjunctival fornizal?LOL
These also contribute to the aqueous layer of the tear film, but are more numerous. |
Accessory Lacrimal Glands of Krause
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In what space are the vessels of the palpebral arcades located?
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Between the submuscular areolar layer which is posterior to the orbicularis oculi and the tarsal plate
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What are the names of the two layers of the palpebral conjunctiva?
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A Stratified Columnar Epithelial Layer and a Connective Tissue Stromal Layer
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Where are the stem cells that repopulate the palpebral conjunctival epithelium located?
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At the mucocutaneous junction
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What are Goblet cells and where are they located?
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Goblet cells produce mucin droplets producing the innermost mucous layer of the tear film. They are scattered throughout the Stratified Epithelial layer of the palpebral conjunctiva.
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What are crypts of henle?
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These are invaginations of palpebral conj epithelium in which goblet cell release their mucous.
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What type of tissue is the Stromal Layer of the Palpebral Conj?
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It is composed of loose, vascularized connective tissue and is subdivided into an outer lymphoid layer and a deep firbrous layer.
IgA is found in the lymphoid layer making this tissue immunologically active. |
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Do concretions contain calcific deposits and where are they located?
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Concretions are small, yellow white nodule most often located on the palpebral conj and are composed of finely granular material and have NO calcific deposits.
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What nerves supply the upper eyelid?
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Branches of the Ophthalmic division of the Trigeminal Nerve CNV:
Supraorbital Supratrochlear Infratrochlear Lacrimal |
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What nerves supply the lower eyelid?
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The infratrochlear branch of the ophthalmic division of CNV
and the infraorbital branch of the maxillary division of CNV |
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What is the name of the blood supply in the eyelid and where does it branch from?
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The eyelids are supplied by the marginal and peripheral palpebral arcades which branch the medial and palpebral arteries which arise from the ophthalmic and lacrimal arteries.
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What is the site for stem cells of the bulbar conjunctiva? And what is the site for the palpebral conj?
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Limbus
and Mucocutaneous junction |
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What is the function of the plica semilunaris?
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It is to allow full lateral movement of the eye without stretching tissue.
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Where do the conjunctival lymphatic vessels empty into?
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Lateral aspect drains to the parotid lymph node while the medial drains to the submandibular lymph node.
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What is Tenon's Capsule and where is it?
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Tenon's is below the conj stromal layer and is a cavity within which the globe can move. It protects and supports the globe and attaches it to orbital connective tissue.
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What is the primary source of atmospheric oxygen for the cornea?
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The tear film!
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What are the 3 layers of the tear film?
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Outermost: Lipid Layer- primarily produced by the Meibommian glands
Middle: Aqueous Layer- secreted by the main and accessory lacrimal gland which are called??? Innermost: Mucous Layer- Produced and secreted by the conj gobelt cells which are located where? |
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What is included in the lacrimal secretory system?
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Main Lacrimal Gland
Accessory Lacrimal Glands Meibommian and Zeiss Glands Conjunctival Goblet Cells |
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The Lacrimal Gland is divided into two sections what are they and what divides them?
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The lacrimal gland is divided into palpebral and orbital divisions by the aponeurosis of the levator.
The orbital division is larger than the palpebral. |
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Where do the 12 lacrimal ducts empty into?
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They empty into the conjunctival sac in the lateral part of the superior fornix and descends across the anterior surface of the globe.
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What makes up the Nasolacrimal Drainage System?
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Puncta
Canaliculi Lacrimal Sac Nasolacrimal Duct 75% of tears is passed throught this system. |
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What is the valve of hasner?
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It connects the nasolacrimal duct to the nasal cavity.
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