Coordination of the eyes and head during visual orienting.
Coordination of the eyes and head during visual orienting.
复制标题
DOI：
10.1007/s00221-008-1504-8
复制
发表时间：
2008-10
影响因子：
2
通讯作者：
Freedman, Edward G.
中科院分区：
文献类型：
--
作者：
Freedman, Edward G.
改变视线的方向对于我们环境的视觉探索是必不可少的。当头部不动时，视轴的重新定位是通过被称为扫视的眼睛的高速共轭运动来完成的。我们对控制眼球跳动的神经机制的理解有了很大的进步，具体的假说已经被开发、评估，有时甚至在新的观察的基础上被拒绝。对现有模型的新假设和新测试的限制经常出现在对行为观察的仔细评估中。眼跳运动的一组特征(或规则)的定义在其神经控制假说的发展中至关重要。当头部可以自由移动时，视线方向的变化可能涉及同时的眼球跳动和头部运动。当头部和眼睛一起运动来完成这些凝视方向的移动时，帮助定义头部约束的眼跳运动的规则就会改变。例如，眼跳运动的持续时间和幅度之间的斜率关系是颠倒的(斜率为负)，在不同眼眶位置的眼睛启动类似幅度的凝视转移时。为了解释这些新的观察结果，可能需要对头戴约束的受试者提出的假设进行修改。本文简要叙述了头抑制眼球跳动的特点，然后描述了眼头协调运动的一些特征，这些特征导致了描述凝视转移控制机制的新假说的发展。
Changing the direction of the line of sight is essential for the visual exploration of our environment. When the head does not move, re-orientation of the visual axis is accomplished with high velocity, conjugate movements of the eyes known as saccades. Our understanding of the neural mechanisms that control saccadic eye movements has advanced rapidly as specific hypotheses have been developed, evaluated and sometimes rejected on the basis of new observations. Constraints on new hypotheses and new tests of existing models have often arisen from the careful assessment of behavioral observations. The definition of the set of features (or rules) of saccadic eye movements was critical in the development of hypotheses of their neural control. When the head is free to move, changes in the direction of the line of sight can involve simultaneous saccadic eye movements and movements of the head. When the head moves in conjunction with the eyes to accomplish these shifts in gaze direction, the rules that helped define head-restrained saccadic eye movements are altered. For example, the slope relationship between duration and amplitude for saccadic eye movements is reversed (the slope is negative) during gaze shifts of similar amplitude initiated with the eyes in different orbital positions. Modifications to the hypotheses developed in head-restrained subjects may be needed to account for these new observations. This review briefly recounts features of head-restrained saccadic eye movements, and then describes some of the characteristics of coordinated eye-head movements that have led to development of new hypotheses describing the mechanisms of gaze shift control.
登录
查看更多内容
影响因子：
64.8
作者：
Bell, CC;Han, VZ;Grant, K
通讯作者：
Grant, K
影响因子：
2.5
作者：
Freedman, EG;Sparks, DL
通讯作者：
Sparks, DL
影响因子：
56.9
作者：
BIZZI, E;KALIL, RE;TAGLIASCO, V
通讯作者：
TAGLIASCO, V
影响因子：
5.5
作者：
BLAKEMORE, C;DONAGHY, M
通讯作者：
DONAGHY, M
影响因子：
2.5
作者：
Cullen, KE;Huterer, M;Sylvestre, PA
通讯作者：
Sylvestre, PA