Gabbard Carl, Ammar Diala
Texas A&M University, College Station, Texas 77843-4243, USA.
Int J Neurosci. 2008 Nov;118(11):1502-14. doi: 10.1080/00207450701591032.
The experiment was conducted to compare visual imagery (VI) and motor imagery (MI) reaching tasks in a response-delay paradigm designed to explore the hypothesized dissociation between vision for perception and vision for action. Although the visual systems work cooperatively in motor control, theory suggests that they operate under different temporal constraints. From this perspective, we expected that delay would affect MI but not VI because MI operates in real time and VI is postulated to be memory-driven. Following measurement of actual reach, right-handers were presented seven (imagery) targets at midline in eight conditions: MI and VI with 0-, 1-, 2-, and 4-s delays. Results indicted that delay affected the ability to estimate reachability with MI but not with VI. These results are supportive of a general distinction between vision for perception and vision for action.
本实验旨在比较视觉意象（VI）和运动意象（MI）在反应延迟范式中的伸手任务，该范式旨在探究假设的感知视觉与行动视觉之间的分离。尽管视觉系统在运动控制中协同工作，但理论表明它们在不同的时间限制下运行。从这个角度来看，我们预计延迟会影响MI但不会影响VI，因为MI实时运行，而VI被假定为由记忆驱动。在测量实际伸手动作后，右利手者在八种条件下在中线处呈现七个（意象）目标：MI和VI，延迟分别为0秒、1秒、2秒和4秒。结果表明，延迟影响了用MI估计可达性的能力，但不影响用VI估计可达性的能力。这些结果支持了感知视觉与行动视觉之间的总体区别。
