South Korean Research Reveals Layer-Specific Responses in Brain's Sensory Cortex
A South Korean research team has discovered that the human brain's sensory cortex responds differently by layer when focusing on a specific tactile sensation. This finding challenges the previous belief that the entire sensory cortex becomes uniformly active during concentration. The study, led by Director Kim Seong-gi of the Center for Neuroscience Imaging, utilized ultra-high field functional magnetic resonance imaging (7T fMRI) to measure layer-specific neural activity. The research revealed that when participants focused on a finger stimulus, the superficial layer's signal increased, while the deep layer's signal decreased, with no significant change in the middle layer. This study, published in 'Nature Communications', provides new insights into how the brain processes sensory information and could have implications for research on cognitive control, pain, and neurological disorders. 
