本文作者讨论了垂直视动性眼震(垂直OKN)和垂直视动后眼震(垂直 OKAN)不对称性新近发展的认识,以及其神经联系。垂直 OKN 不如水平 OKN 那样容易引出,常需用高速垂直运动的幕景才能引出来。在动物试验中,垂直 OKN 不对称的表现为向下 OKN 的增益较少,较不规则,跳动次数少,时间常数较向上 OKN 短。人和动物试验的结果不同,在宇宙飞行的人试验中表明,用恒定速度刺激的垂直 OKN 的不对称性,与上述相反,即向上OKN 的增益减少,向下 OKN 的增益增加。作者用鼠猴切除双侧球囊斑,用高速垂直活动幕景刺激,也表现为向下 OKN 的增益增加,这可能解释为球囊斑传入神经与“y”群神经元有联系的缘故。垂直 OKAN 是指视动刺激停止以后,储存的神经冲动使眼球继续活动而产生的眼震。这可能是中枢神经系统的某一部位存在漏孔式整合体的缘故。OKAN 包括 The authors discuss recent advances in the understanding of the asymmetry of vertical optokinetic (vertical OKN) and vertical optokinetic (vertical OKAN) as well as their neural connections. Vertical OKN is not as easy as horizontal OKN leads, often need to use high-speed vertical motion of the screen can lead to. In animal experiments, the vertical OKN asymmetry shows downward OKN gain less, less regular, fewer beats, and shorter time constants than up OKN. The results of human and animal experiments are different and demonstrated in human trials of cosmic flights that the asymmetry of the vertical OKN stimulated with a constant velocity is opposite to the above, ie the gain of the upward OKN decreases and the gain of the downward OKN increases. The authors excised bilateral balloon plaques with a murine monkey and stimulated with a high-speed vertical activity screen, also showing an increase in gain down OKN, which may be explained by the association of the afferent nerves of the plaque with the “y” group of neurons . Vertical OKAN refers to the visual stimulation stop, the stored nerve impulses to keep the eye resulting from nystagmus. This may be a part of the central nervous system exists due to leaky integration. OKAN included