2008-2009 Basic and Clinical Science Course: Section 5: by Lanning B. Kline, MD PDF

By Lanning B. Kline, MD

ISBN-10: 1560558784

ISBN-13: 9781560558781

A patient-centered method of the prognosis and remedy of significant neuro-ophthalmic stipulations. concentrating on very important offering symptoms, this publication leads the reader in the course of the occasionally refined manifestations of neuro-ophthalmic sickness to anatomic localization of lesions and definitive prognosis. additionally contains an summary of the anatomy of the visible pathway, directions for undertaking the neuro-ophthalmic exam and acceptable use of diagnostic imaging reports.

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Extra info for 2008-2009 Basic and Clinical Science Course: Section 5: Neuro-Ophthalmology (Basic and Clinical Science Course 2008-2009)

Sample text

Supplementary eye fields, located on the dorsomedial surface of the superior frontal gyrus, receive input from the frontal eye fields and are responsible for programming saccades (particularly as part of learned behavior). The supranuclear pathways descend to the superior colliculus, midbrain, and pontine pause cells that are located in the nucleus raphe interpositus as well as the nucleus reticularis tegmenti pontis (NRTP). The pursuit system for visual targets originates in VS-the human homologue of MT -where it receives input from the primary visual system both from the cortex and likely from magnocellular input directly from the geniculate (Fig 1-17).

The origin of the inferior oblique muscle is in the anterior inferior medial periorbita near the posterior margin of the lacrimal fossa. The effective origin of the superior oblique muscle is the trochlea, a pulleylike structure located at the notch in the superior medial orbit. The superior oblique muscle runs anteriorly in the superomedial orbit to the trochlea, where its tendon reverses its direction of action. The EOMs are of variable mass and cross section: the inferior oblique is the thinnest, and the medial rectus is the largest.

The medial superior temporal (MST) area is also involved in generating pursuit signals in response to moving stimuli. It appears to be supplied with information about head movement as well as eye movement commands (efference copy) and thus is critical to generating pursuit movements to follow a target while the head is moving. Target recognition and selection probably receive additional input through the reciprocal connections to area 7a, lying ventral to the intraparietal sulcus. Information from the MT and MST projects via the posterior portion of the internal capsule to the dorsolateral pontine nuclei (DLPN) and lateral pontine nuclei, including the NRTP.

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2008-2009 Basic and Clinical Science Course: Section 5: Neuro-Ophthalmology (Basic and Clinical Science Course 2008-2009) by Lanning B. Kline, MD


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