Rapid gamma oscillations in the inferior occipital gyrus in response to eyes.
Eyes are an indispensable communication medium for human social interactions. Although previous neuroscientific evidence suggests the activation of the inferior occipital gyrus (IOG) during eye processing, the temporal profile of this activation remains unclear. To investigate this issue, we analyzed intracranial electroencephalograms of the IOG during the presentation of eyes and mosaics, in either averted or straight directions. Time-frequency statistical parametric mapping analyses revealed greater gamma-band activation in the right IOG beginning at 114 ms in response to eyes relative to mosaics, irrespective of their averted or straight direction. These results suggest that gamma oscillations in the right IOG are involved in the early stages of eye processing, such as eye detection.
Department of Neurodevelopmental Psychiatry, Habilitation and Rehabilitation, Graduate School of Medicine, Kyoto University, 53 Shogoin-Kawaharacho, Sakyo, Kyoto 606-8507, Japan.
Wataru
W
Sato
Brain Activity Imaging Center, Advanced Telecommunications Research Institute International, 2-2-2 Hikaridai, Seika, Soraku, Kyoto 619-0288, Japan.
Takanori
T
Kochiyama
Department of Neurodevelopmental Psychiatry, Habilitation and Rehabilitation, Graduate School of Medicine, Kyoto University, 53 Shogoin-Kawaharacho, Sakyo, Kyoto 606-8507, Japan.
Shota
S
Uono
National Epilepsy Center, Shizuoka Institute of Epilepsy and Neurological Disorders, Urushiyama 886, Shizuoka 420-8688, Japan.
Kazumi
K
Matsuda
National Epilepsy Center, Shizuoka Institute of Epilepsy and Neurological Disorders, Urushiyama 886, Shizuoka 420-8688, Japan.
Keiko
K
Usui
National Epilepsy Center, Shizuoka Institute of Epilepsy and Neurological Disorders, Urushiyama 886, Shizuoka 420-8688, Japan.
Naotaka
N
Usui
National Epilepsy Center, Shizuoka Institute of Epilepsy and Neurological Disorders, Urushiyama 886, Shizuoka 420-8688, Japan.
Yushi
Y
Inoue
Faculty of Human Health Science, Graduate School of Medicine, Kyoto University, 53 Shogoin-Kawaharacho, Sakyo, Kyoto 606-8507, Japan.|The Organization for Promoting Developmental Disorder Research, 40 Shogoin-Sannocho, Sakyo, Kyoto 606-8392, Japan.
Motomi
M
Toichi
D000328:Adult; D004569:Electroencephalography; D005133:Eye Movements; D005260:Female; D005403:Fixation, Ocular; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009778:Occipital Lobe / Q000502:physiology*; D009799:Ocular Physiological Phenomena; D010775:Photic Stimulation / Q000379:methods*; D011930:Reaction Time / Q000502:physiology