This is ECoG data from Yanagawa, T., Chao, Z. C., Hasegawa, N., & Fujii, N. (2013). "Large-Scale Information Flow in Conscious and Unconscious States: an ECoG Study in Monkeys." PloS one, 8(11), e80845.
A monkey who was sitting still with its hard and arms restrained and was then anesthetized so as to lose consciousness.
One monkey was sitting calm with head and arm restrained. ECoG data were recoreded first with alert and later with anesthetic condition.
128-channel ECoG data were sampled at 1KHz.
Data are originally from http://neurotycho.org/anesthesia-task.