A probabilistic atlas of finger dominance in the primary somatosensory cortex
نویسندگان
چکیده
منابع مشابه
Thalamocortical connections of the primary somatosensory cortex
Although each subdivision of primary somatosensory cortex (SI) receives dense input from the thalamus, but the exact location and type of information that the fibers convey have not been identified yet. In the present study, the exact source of thalamocortical fibers to areas 2 and 3b was investigated using tract-tracing techniques. Following injection of tracer into area 3b, labeled neurons ...
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The primary somatosensory cortex (SI) exhibits a detailed topographic organization of the hand and fingers, which has been found to undergo plastic changes following modifications of the sensory input. Although the spatial properties of these changes have been extensively investigated, little is known about their temporal dynamics. In this study, we adapted the paradigm of finger webbing, in wh...
متن کاملPrimary Somatosensory and Motor Cortex
Figure 1. The gross anatomy of the brain is shown from a lateral (a) and medial (b) view. The wrinkled outer surface that covers the majority of the brain is the cerebral cortex. In panel (a) labels illustrate some of the areas of localized function including primary motor cortex on the precentral gyrus (M1) and primary somatosensory cortex on the postcentral gyrus (S1). Other primary sensory c...
متن کاملSeparate finger representations at the human second somatosensory cortex.
We recorded neuromagnetic responses of the second somatosensory cortex in healthy humans. Cutaneous electrical stimulation of fingers elicited a response around 100 ms, with a field pattern agreeing with activation of the second somatosensory cortex in the upper bank of the Sylvian fissure. In an oddball paradigm, with standards presented to the thumb and deviants (10%) to the middle finger, or...
متن کاملTactile hyperacuity thresholds correlate with finger maps in primary somatosensory cortex (S1).
Behavioral tactile discrimination thresholds were compared with functional magnetic resonance imaging measurements of cortical finger representations within primary somatosensory cortex (S1) for 10 human subjects to determine whether cortical magnification in S1 could account for the variation in tactile hyperacuity thresholds of the fingers. Across 10 subjects, the increase in tactile threshol...
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ژورنال
عنوان ژورنال: NeuroImage
سال: 2020
ISSN: 1053-8119
DOI: 10.1016/j.neuroimage.2020.116880