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KMID : 1036520110010010022
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Clinical Neuro-Ophthalmology
2011 Volume.1 No. 1 p.22 ~ p.28
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Smooth Pursuit and Visual Fixation
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KIm Seon-Hye
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Abstract
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Smooth pursuit eye movements stabilize the image of an object on the fovea during slow movements of the object. The initiation of smooth pursuit is driven by a retinal slip and maintenance is driven by a combination of retinal and extraretinal information. Motion sensitive visual area V5, middle temporal area (MT)/medial superior temporal area (MST), and frontal eye field are core structure for smooth pursuit. Additional structures such as pontine nuclei (dorsolateral pontine nuclei, DLPN; nucleus reticularis tegmenti pontis, NRTP), and cerebellum (especially flocculus, paraflucculus, dorsal vermis and fastigial nucleus) are also important role. Unlikely smooth pursuit, visual fixation enable us to focus our eyes on steady objects for clear vision. Rostral pole of superior colliculus and certain parietal lobe are critical role in maintenance of visual fixation.
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KEYWORD
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Smooth pursuit, Visual fixation
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