Williamson S J, Kaufman L, Lu Z L, Wang J Z, Karron D
Department of Physics, New York University, New York 10003, USA.
Int J Psychophysiol. 1997 Jun;26(1-3):63-76. doi: 10.1016/s0167-8760(97)00756-3.
Alpha rhythm of the parieto-occipital area is comprised of a parade of short-lived cortical excitations (alphons), each of which exhibits oscillations having a stable period within the alpha bandwidth. Strong alpha rhythm is produced by alphons extending over a larger cortical area, although an enhanced cortical current density may also contribute. Local suppression of alpha rhythm indicates when specific cortical areas become engaged in sensory or cognitive functions. Examples are provided for mental imagery, visual memory, auditory memory, and silent rhythming.
顶枕区的α节律由一系列短暂的皮质兴奋（α波）组成，每个α波在α频段内都表现出具有稳定周期的振荡。较强的α节律是由覆盖更大皮质区域的α波产生的，尽管皮质电流密度的增强也可能有作用。α节律的局部抑制表明特定皮质区域何时参与感觉或认知功能。文中给出了心理意象、视觉记忆、听觉记忆和默读韵律方面的例子。
