陕西师范大学心理学院,西安 710062
陕西师范大学中央高校基本科研业务费(GK202103132) 和陕西师范大学科研启动基金(1110011181) 资助项目。
School of Psychology, Shaanxi Normal University, Xi’an 710062, China
This work was supported by grants from the Fundamental Research Funds for the Central Universities (GK202103132) and Scientific Research Foundation of Shaanxi Normal University Grant (1110011181)
近年来许多研究发现,小脑作为运动控制的主要脑区,除参与运动控制外也与孤独症、精神分裂症、奖励相关的认知功能和社会行为有关,因此小脑相关研究越来越受到重视。研究小脑参与运动学习和运动控制的神经机制是神经科学中最重要的课题之一。眼睛运动的肌肉协调和生物运动特征比其他类型的运动更简单,这使眼动成为研究小脑在运动控制中作用的理想模型。作为收集外界信息的主要方式之一,视觉对日常生活至关重要。为确保清晰视觉,3种主要类型的眼动(眼跳、平滑追随眼动(SPEM)和注视)需受小脑的精确控制,以确保静止或移动的物体保持在视小凹的中心。异常眼动可导致视力障碍,并可作为诊断各种疾病的临床指标。因此,眼动控制研究具有重要的医学和生物学意义。虽然对小脑皮层和顶核在调节眼动中的作用有基本了解,但眼动动力学编码的确切神经机制,尤其是小脑顶核控制追随眼动和注视的神经机制仍不清楚。本综述总结了目前小脑在运动和认知等方面的主要研究问题与小脑相关研究的潜在应用价值,以及近年来有关小脑控制眼动的相关文献,并深入探讨了利用单细胞记录和线性回归模型分析小脑皮层和顶核同一神经元同时参与控制不同类型的眼动,而不同类型眼动的不同动力学参数编码原则不同。此外,基于检测微眼跳的研究结果,我们讨论了小脑顶核参与控制视觉注视的可能神经机制。最后,讨论了最近技术进步给小脑研究带来的新机遇,为今后与小脑相关的研究和脑控义肢的优化控制(例如通过单独改善运动参数优化义肢控制)提供了新思路。
Cerebellum, as a classical main brain region of motor control, has been found in many recent studies to be also associated with autism, schizophrenia and reward-related cognitive function and social behavior, therefore, the study of cerebellum has received increasing attention. Studying the neural mechanism of cerebellar participation in movement learning and motion control is one of the most important subjects in neuroscience. Muscular coordination and biokinematic features of eye movement are simpler than the other types of movements, which makes it an ideal model to study the role of cerebellum in movement control. As one of the main ways to collect information, vision is important to our daily life. The 3 main types of eye movements (saccade, smooth-pursuit eye movement (SPEM) and fixation) that are used to ensure clear vision must be precisely controlled by the cerebellum to ensure that stationary or moving objects remain in the center of the fovea. Abnormal eye movement could lead to visual impairment and is used as a clinical indicator for diagnoses of a variety of diseases. Therefore, the study of eye movement control has important medical and biological significance. Although there is a basic understanding of the role of cerebellar cortex and caudal fastigial nuclei in modulating eye movements, the exact neural mechanism of encoding kinematics of eye movements, especially the neural mechanism underlying the control of SPEM in caudal fastigial remains unclear. This review discusses the main open questions in cerebellar researches regarding motor control, cognition and the potential application value of studying cerebellum, summarizes the relevant literatures on cerebellar implication in eye movement control in recent years, and discusses our recent findings using single-cell electrophysiological recordings and mathematical linear regression models, revealing that the neurons in cerebellar cortex and nuclei are both involved in the precise control of different types of eye movements, whereas with different principles for the encoding of different kinematic parameters for different types of eye movements. Moreover, based on previous findings by detecting microsaccades, we discuss possible neural mechanism underlying the involvement of cerebellar nuclei in regulating visual fixation. In addition, this review discusses the new opportunities brought by recent technological advances in neuroscience, and provides new ideas for future cerebellum-related research and the optimization of brain-controlled prosthesis, potentially by improving the control of kinematic parameters separately.
孙宗鹏.小脑控制不同类型眼动的神经编码机制:从小脑皮层到小脑核团[J].生物化学与生物物理进展,2022,49(7):1251-1263
复制生物化学与生物物理进展 ® 2025 版权所有 ICP:京ICP备05023138号-1 京公网安备 11010502031771号