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Orbit
Medical School Gross Anatomy
19
Anatomy
Graduate
09/23/2011

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Cards

Term
How do tears drain into the nose?
Definition
Through the nasolacrimal duct
Term
What are the three nerves in the orbit that do not go inside the Common Tendinous Ring?
Definition
Lacrimal
Frontal
Trochlear
Term
What are the two arteries in the orbit?
Definition
Central Retina Artery
Opthalmic Artery
Term
What are the two veins of the orbit?
Definition
Superior/Inferior Opthalmic
Term
What provides sensory enervation to the orbit?
Definition
Opthalmic Nerve
Term
What are the branches of the Opthalmic nerve?
Definition
Frontal
Lacrimal
Nasociliary
Term
What nerves provide motor enervation to the orbit?
Definition
Oculomotor
Abducens
Trochlear
Term
What provides parasympathetic enervation to the lacrimal glands of the orbit?
Definition
Greater Petrosal Nerve (Branch of Facial Nerve), ganglion is the Pterygopalantine
Term
What orbital muscles are enervated by the oculomoter nerve?
Definition
Levator Palpabrae Superioris
Superior Rectus
Medial Rectus
Inferior Rectus
Inferior Oblique
Term
What muscles of the orbit are enervated by the Trochlear nerve?
Definition
Superior Oblique
Term
What muscle of the orbit is enervated by the abducens nerve?
Definition
Lateral Rectus
Term
What clinical presentation is seen in the orbit with the loss of the abducens?
Definition
Medial Strabismus
-gaze directed inwards
Term
What nerve is damaged if the eye is deviated down and out?
Definition
Oculomotor
Term
Bulging optic disc indicates what?
Definition
Increased CSF pressure
Term
Sphincter Pupili and Ciliary muscles are enervated by what nerve?
Definition
Parasympathetics from CN III, synapse in the ciliary ganglion
Term
What enervates the dilator pupili?
Definition
Sympathetic fibers from CN III, ganglion is the superior cervical ganglion
Term
What enervates Muller's muscle? What is the function of Muller's muscle?
Definition
Sympathetics from CN III, the function of Mullers muscle is to elevate the upper eyelid
Term
What is Ptosis?
Definition
Drooping of the eyelid from dysfunction of Muller's Muscle
Term
What is Horner's syndrome?
Definition
Loss of sympathetics to the head
-constricted pupil
-flushing of face
-Ptosis
-Anhydrosis
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