Lamotte R H, Acuña C
Brain Res. 1978 Jan 13;139(2):309-26. doi: 10.1016/0006-8993(78)90931-9.
We measured the capacity of monkeys to project the arm to visually located targets under conditions differing in the nature of visual control allowed during reaching. This capacity was impaired by a unilateral posterior parietal lesion which increased the magnitude and variability of errors in projecting the contralateral arm to targets located on either side of the midline. Furthermore, accurate projections of the arm were often accompanied by misorientations of the fingers of the hand. These errors occurred whether reaching with or without visual guidance of the limb. The presence or absence of vision influenced the direction of errors in arm projection. Under conditions permitting a view of the limb and sight of the target, errors occurred in a direction toward the side of the lesion. When all visual cues were eliminated during reaching, errors were directed away from on-target toward the midline as they are in normal monkeys, but were greater in magnitude following the lesion.
我们测量了猴子在不同视觉控制条件下将手臂伸向视觉定位目标的能力，这些条件在伸手过程中允许的视觉控制性质方面有所不同。这种能力因单侧后顶叶损伤而受损，该损伤增加了将对侧手臂伸向位于中线两侧目标时误差的大小和变异性。此外，手臂的准确伸展常常伴随着手部手指的错误定向。无论肢体有无视觉引导，这些错误都会出现。视觉的存在与否影响了手臂伸展误差的方向。在允许看到肢体和目标的条件下，误差朝着损伤侧的方向出现。当伸手过程中所有视觉线索都被消除时，误差如同在正常猴子中一样，从目标指向中线，但损伤后误差的大小更大。
