Models of Saccade System that Include the Superior Colliculus.
نویسندگان
چکیده
منابع مشابه
Simulations of saccade curvature by models that place superior colliculus upstream from the local feedback loop.
When humans or monkeys are asked to make saccades to visual targets accompanied by one or more distractors, the two dimensional trajectory of the saccade will sometimes display significant curvature. Port and Wurtz used dual electrode recordings to show that this phenomenon is associated with activity at more than one site in superior colliculus (SC). The timing and initial direction of the cur...
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A 70 year old patient with a small haematoma largely restricted to the area of the right superior and inferior colliculi is reported. Eye movements were electro-oculographically recorded 17 and 80 days after the onset of the haematoma. At the first examination, latency of lateral reflexive visually-guided saccades was asymmetrical, both in the gap task (central fixation point switched off 200 m...
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The characteristics of microsaccades, or small fixational saccades, and their influence on visual function have been studied extensively. However, the detailed mechanisms for generating these movements are less understood. We recently found that the superior colliculus (SC), a midbrain structure involved in saccade generation, also plays a role in microsaccade generation. Here we compared the d...
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Searching for a visual object naturally involves sequences of gaze fixations, during which the current foveal image is analyzed and the next object to inspect is selected as a saccade target. Fixation durations during such sequences are short, suggesting that saccades may be concurrently processed. Therefore, the selection of the next saccade target may occur before the current saccade target i...
متن کاملActivity changes in monkey superior colliculus during saccade adaptation.
Saccades are eye movements that are used to foveate targets rapidly and accurately. Their amplitude must be adjusted continually, throughout life, to compensate for movement inaccuracies due to maturation, pathology, or aging. One possible locus for such saccade adaptation is the superior colliculus (SC), the relay for cortical commands to the premotor brain stem generator for saccades. However...
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ژورنال
عنوان ژورنال: Equilibrium Research
سال: 1998
ISSN: 0385-5716,1882-577X
DOI: 10.3757/jser.57.33