DEAD RECKONING, LANDMARK LEARNING, AND THE SENSE OF DIRECTION - A NEUROPHYSIOLOGICAL AND COMPUTATIONAL HYPOTHESIS
DEAD RECKONING, LANDMARK LEARNING, AND THE SENSE OF DIRECTION - A NEUROPHYSIOLOGICAL AND COMPUTATIONAL HYPOTHESIS
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DOI：
10.1162/jocn.1991.3.2.190
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发表时间：
1991-03-01
影响因子：
3.2
通讯作者：
MARKUS, EJ
中科院分区：
文献类型：
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作者：
MCNAUGHTON, BL;CHEN, LL;MARKUS, EJ
行为和神经生理学证据强烈表明，在一定限度内，啮齿类动物和人类可以相对于惯性坐标系（即非中心坐标系）跟踪其方向。这种“方向感”似乎涉及主要在前庭系统中产生的角速度信号的积分。提出了一种假设，其中积分过程（神经元可能难以实现的操作）被线性关联映射（至少在理论上很容易用神经元实现的操作）取代。所提出的系统利用一组表示当前头部方向和头部角速度表示的组合的线性独立向量来“回忆”所得到的头部方向。然后提出将视觉地标纳入方向系统，从而能够校正累积误差，并最终计算位置之间新颖的最佳轨迹。根据该假设，这是通过海马“局部视图”细胞（即方向选择性“位置细胞”）与位于背侧前下托下游的“头部方向”细胞的关联而发生的。讨论了所提出的系统可能的神经生理学和神经解剖学基础。
Behavioral and neurophysiological evidence strongly suggests that, within certain limits, rodents and humans can keep track of their directional heading relative to an inertial, and hence allocentric coordinate system. This "sense of direction" appears to involve the integration of angular velocity signals that arise primarily in the vestibular system. A hypothesis is proposed in which the integration process, an operation that may be difficult for neurons to implement, is replaced by a linear associative mapping, an operation that is at least theoretically easy to implement with neurons. The proposed system makes use of a set of linearly independent vectors representing the combination of the current head direction, and head angular velocity representations to "recall" the resulting head direction. It is then proposed that visual landmarks become incorporated into the directional system, enabling both the correction of cumulative error and, ultimately, the computation of novel, optimal trajectories between locations. According to the hypothesis, this occurs through the association of hippocampal "local-view" cells (i.e., direction selective "place cells") with "head-direction" cells located downstream in the dorsal presubiculum. The possible neurophysiological and neuroanatomical bases for the proposed system are discussed.