TY - JOUR
T1 - Upright face-preferential high-gamma responses in lower-order visual areas
T2 - Evidence from intracranial recordings in children
AU - Matsuzaki, Naoyuki
AU - Schwarzlose, Rebecca F.
AU - Nishida, Masaaki
AU - Ofen, Noa
AU - Asano, Eishi
N1 - Publisher Copyright:
© 2015 Elsevier Inc.
PY - 2015/4/1
Y1 - 2015/4/1
N2 - Behavioral studies demonstrate that a face presented in the upright orientation attracts attention more rapidly than an inverted face. Saccades toward an upright face take place in 100-140. ms following presentation. The present study using electrocorticography determined whether upright face-preferential neural activation, as reflected by augmentation of high-gamma activity at 80-150. Hz, involved the lower-order visual cortex within the first 100. ms post-stimulus presentation. Sampled lower-order visual areas were verified by the induction of phosphenes upon electrical stimulation. These areas resided in the lateral-occipital, lingual, and cuneus gyri along the calcarine sulcus, roughly corresponding to V1 and V2. Measurement of high-gamma augmentation during central (circular) and peripheral (annular) checkerboard reversal pattern stimulation indicated that central-field stimuli were processed by the more polar surface whereas peripheral-field stimuli by the more anterior medial surface. Upright face stimuli, compared to inverted ones, elicited up to 23% larger augmentation of high-gamma activity in the lower-order visual regions at 40-90. ms. Upright face-preferential high-gamma augmentation was more highly correlated with high-gamma augmentation for central than peripheral stimuli. Our observations are consistent with the hypothesis that lower-order visual regions, especially those for the central field, are involved in visual cues for rapid detection of upright face stimuli.
AB - Behavioral studies demonstrate that a face presented in the upright orientation attracts attention more rapidly than an inverted face. Saccades toward an upright face take place in 100-140. ms following presentation. The present study using electrocorticography determined whether upright face-preferential neural activation, as reflected by augmentation of high-gamma activity at 80-150. Hz, involved the lower-order visual cortex within the first 100. ms post-stimulus presentation. Sampled lower-order visual areas were verified by the induction of phosphenes upon electrical stimulation. These areas resided in the lateral-occipital, lingual, and cuneus gyri along the calcarine sulcus, roughly corresponding to V1 and V2. Measurement of high-gamma augmentation during central (circular) and peripheral (annular) checkerboard reversal pattern stimulation indicated that central-field stimuli were processed by the more polar surface whereas peripheral-field stimuli by the more anterior medial surface. Upright face stimuli, compared to inverted ones, elicited up to 23% larger augmentation of high-gamma activity in the lower-order visual regions at 40-90. ms. Upright face-preferential high-gamma augmentation was more highly correlated with high-gamma augmentation for central than peripheral stimuli. Our observations are consistent with the hypothesis that lower-order visual regions, especially those for the central field, are involved in visual cues for rapid detection of upright face stimuli.
KW - Category-specific responses
KW - ECoG
KW - High-frequency oscillations (HFOs)
KW - Intracranial recording
KW - Pediatric epilepsy surgery
KW - Ripples
UR - http://www.scopus.com/inward/record.url?scp=84921859129&partnerID=8YFLogxK
U2 - 10.1016/j.neuroimage.2015.01.015
DO - 10.1016/j.neuroimage.2015.01.015
M3 - Article
C2 - 25579446
AN - SCOPUS:84921859129
SN - 1053-8119
VL - 109
SP - 249
EP - 259
JO - NeuroImage
JF - NeuroImage
ER -