Signaling of object approach by the DCMD neuron of the locust

被引:52
作者
Rind, FC
Simmons, PJ
机构
[1] Department of Neurobiology, Newcastle University
关键词
D O I
10.1152/jn.1997.77.2.1029
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
The locust descending contralateral motion detector (DCMD) responds to movements anywhere within a wide visual field, but responds most strongly to the images of approaching objects. It has been claimed that the response peaks before the end of an approach movement, providing a signal that anticipates collision. However, we find that when the locust eye is presented with appropriate computer-generated images of approaching objects, the response builds up until after movement has stopped. Premature peaking in the response is due to failure to stimulate the eye with sufficiently small and frequent jumps in image edges. We conclude that the DCMD signals impending collision by tracking edge motion throughout object approach.
引用
收藏
页码:1029 / 1033
页数:5
相关论文
共 5 条
[1]   ELEMENTARY COMPUTATION OF OBJECT APPROACH BY A WIDE-FIELD VISUAL NEURON [J].
HATSOPOULOS, N ;
GABBIANI, F ;
LAURENT, G .
SCIENCE, 1995, 270 (5238) :1000-1003
[2]   Neural network based on the input organization of an identified neuron signaling impending collision [J].
Rind, FC ;
Bramwell, DI .
JOURNAL OF NEUROPHYSIOLOGY, 1996, 75 (03) :967-985
[3]   Intracellular characterization of neurons in the locust brain signaling impending collision [J].
Rind, FC .
JOURNAL OF NEUROPHYSIOLOGY, 1996, 75 (03) :986-995
[4]   ORTHOPTERAN DCMD NEURON - A REEVALUATION OF RESPONSES TO MOVING-OBJECTS .1. SELECTIVE RESPONSES TO APPROACHING OBJECTS [J].
RIND, FC ;
SIMMONS, PJ .
JOURNAL OF NEUROPHYSIOLOGY, 1992, 68 (05) :1654-1666
[5]   ORTHOPTERAN DCMD NEURON - A REEVALUATION OF RESPONSES TO MOVING-OBJECTS .1. CRITICAL CUES FOR DETECTING APPROACHING OBJECTS [J].
SIMMONS, PJ ;
RIND, FC .
JOURNAL OF NEUROPHYSIOLOGY, 1992, 68 (05) :1667-1682