Machado S, Cunha M, Portella C E, Silva J G, Velasques B, Bastos V H, Basile L, Cagy M, Piedade R A, Ribeiro P
Laboratorio de Topografía Cerebral e Integración Sensoriomotora, IPUB/UFRJ, Universidad Federal Fluminense, Brasil.
Rev Neurol. 2008;47(3):146-9.
A fundamental aspect of planning future actions is the performance and control of motor tasks. This behaviour is done through sensory-motor integration.
To explain the electrophysiological mechanisms in the cortex (modifications to the alpha band) that are involved in anticipatory actions when individuals have to catch a free-falling object.
The sample was made up of 20 healthy subjects of both sexes (11 males and 9 females) with ages ranging between 25 and 40 years (32.5 +/- 7.5) who were free of mental or physical diseases (previous medical history); the subjects were right-handed (Edinburgh Inventory) and were not taking any psychoactive or psychotropic substances at the time of the study. The experiment consisted in a task in which subjects had to catch freely falling objects. The experiment was made up of six blocks of 15 tests, each of which lasted 2 minutes and 30 seconds, with a break of one minute between blocks. Data were captured by means of a quantitative electroencephalogram two seconds before and two seconds after each ball was dropped.
An interaction of the factors moment and position was only observed for the right parietooccipital cortex, in the combination of electrodes P4-O2.
These findings suggest that the right parietooccipital cortex plays an important role in increasing expectation and swiftness in the processes of preparing for a motor task.
规划未来行动的一个基本方面是运动任务的执行与控制。这种行为是通过感觉运动整合来完成的。
解释当个体必须接住自由下落的物体时，参与预期动作的皮质中的电生理机制（α波段的变化）。
样本由20名年龄在25至40岁（32.5±7.5）之间的健康男女组成（11名男性和9名女性），他们没有精神或身体疾病（既往病史）；受试者为右利手（爱丁堡量表），且在研究时未服用任何精神活性或精神otropic物质。实验包括一项任务，即受试者必须接住自由下落的物体。实验由六个包含15次测试的组块组成，每个组块持续2分30秒，组块之间有1分钟的休息时间。在每次球落下前两秒和落下后两秒通过定量脑电图捕获数据。
仅在电极P4 - O2的组合中，右侧顶枕叶皮质观察到了时刻和位置因素的相互作用。
这些发现表明，右侧顶枕叶皮质在增加运动任务准备过程中的预期和敏捷性方面发挥着重要作用。
