1Vision and Control of Action (VISCA) Group, Department of Cognition, Development and Psychology of Education, Institut de Neurociències, Universitat de Barcelona, Passeig de la Vall d'Hebron 171, 08035 Barcelona, Catalonia Spain.
2Department of Human Movement Sciences, Institute for Brain and Behavior Amsterdam, Vrije Universiteit Amsterdam, Van der Boechorststraat 9, 1081BT Amsterdam, The Netherlands.
Commun Biol. 2019 Jan 28;2:38. doi: 10.1038/s42003-019-0293-x. eCollection 2019.
There are two main anatomically and physiologically defined visual pathways connecting the primary visual cortex with higher visual areas: the ventral and the dorsal pathway. The influential two-visual-systems hypothesis postulates that visual attributes are analyzed differently for different functions: in the dorsal pathway visual information is analyzed to guide actions, whereas in the ventral pathway visual information is analyzed for perceptual judgments. We here show that a person who cannot identify objects due to an extensive bilateral ventral brain lesion is able to judge the velocity at which an object moves. Moreover, both his velocity judgements and his interceptive actions are as susceptible to a motion illusion as those of people without brain lesions. These findings speak in favor of the idea that dorsal structures process information about attributes such as velocity, irrespective of whether such information is used for perceptual judgments or to guide actions.
腹侧通路和背侧通路。有影响力的双视觉系统假说假设，视觉属性是为了不同的功能而被不同地分析：在背侧通路中，视觉信息被分析以指导动作，而在腹侧通路中，视觉信息被分析用于感知判断。我们在这里表明，一个由于广泛的双侧腹侧大脑损伤而无法识别物体的人，能够判断物体移动的速度。此外，他的速度判断和他的拦截动作都像没有大脑损伤的人一样容易受到运动错觉的影响。这些发现支持了这样一种观点，即背侧结构处理关于速度等属性的信息，而不管这些信息是用于感知判断还是用于指导动作。
