Anisotropic spatial coherence of ongoing and spontaneous activities in auditory cortex.
We carried out voltage-sensitive dye imaging of the guinea pig auditory cortex to determine whether the ongoing and spontaneous activities of the cortex exhibit spatial coherence reflecting the tonotopic organization of the cortex. We used independent component analysis and a signal-plus-noise model to extract ongoing activities from the observed signals including physiological noise and stimulus-evoked activities. We analyzed the cross-correlations of background activities between all pairs of recording channels and found that ongoing and spontaneous activities in the auditory cortex exhibited anisotropic spatial coherence extending along the isofrequency bands.
Yoshida
Takamasa
T
Department of Physical Electronics, Graduate School of Science and Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo, Japan.
Sakagami
Masanori
M
Katura
Takusige
T
Yamazaki
Kyoko
K
Tanaka
Shigeru
S
Iwamoto
Mitsumasa
M
Tanaka
Naoki
N
D000161:Acoustic Stimulation; D000818:Animals; D016880:Anisotropy; D001303:Auditory Cortex / Q000502:physiology*; D001931:Brain Mapping; D004396:Coloring Agents; D006168:Guinea Pigs; D007091:Image Processing, Computer-Assisted; D008297:Male; D025341:Principal Component Analysis; D041623:Tomography, Optical Coherence
D004396:Coloring Agents