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Based on the electrophysiological data of non-human primates and other species, the visual attention model predicts that in humans, the upper midbrain colliculus (SC) represents the last downstream structure of a large frontal-subcortical attention network
.
This view is partly supported by human case studies, that is, visual spatial inattention after extensive brain damage including SC occurs, which is often referred to as visual negligence
.
Based on the electrophysiological data of non-human primates and other species, the visual attention model predicts that in humans, the upper midbrain colliculus (SC) represents the last downstream structure of a large frontal-subcortical attention network
SC mainly accepts retinal input from the contralateral visual hemisphere, striatal cortex, prefrontal cortex, frontal eye field, and parietal cortex
.
SC SC mainly accepts retinal input from the contralateral visual hemisphere, striatal cortex, prefrontal cortex, frontal eye field, and parietal cortex
A woman in her 40s developed a small abscess confined to the SC on the right side (Figure 1)
.
A woman in her 40s developed a small abscess confined to the SC on the right side (Figure 1)
The unilateral participation of SC enables researchers to observe the asymmetry of the distribution of visual attention, which directly proves the role of this structure in the distribution of visual attention
- Using Singlims for analysis and statistical analysis (Figure 2), comparing the patient's eye movement data with the eye movement data of 15 age- and gender-matched healthy controls (HC) confirmed the hypothesis that the left side is ignored and the gaze is significantly reduced And lower cumulative fixation duration (patient: 5.
208; HC: mean [SD], 10.
The study of this rare case provides direct evidence for the role of SC in guiding visual attention and eye orientation to the opposite cerebral hemisphere, supporting the view that in humans, SC is not only a node in the downward visual attention pathway , And is actually the key neural substrate for visual attention control itself
Literature source: https://jamanetwork-com.
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