The number and structure of giant vertical cells (VS) in the lobula plate of the blowflyCalliphora erythrocephala

Hengstenberg, R; Hausen, Klaus; Hengstenberg, B

doi:10.1007/bf00619211

Cited by 151 publications

(110 citation statements)

References 26 publications

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“…In the blowfly, VS cells comprise a set of 10 large, T--shaped neurons. Both their dendritic spanning fields, i.e., the tissue area covered by their dendritic arbors [68,69], as well as their receptive fields [70] are highly stereotyped across individuals. Arranged in a row, VS cells are numbered from 1 to 10 from most distal to most proximal [68].…”

Section: Vs Cell Response Propertiesmentioning

confidence: 99%

“…Both their dendritic spanning fields, i.e., the tissue area covered by their dendritic arbors [68,69], as well as their receptive fields [70] are highly stereotyped across individuals. Arranged in a row, VS cells are numbered from 1 to 10 from most distal to most proximal [68]. The center of their rotational receptive fields shifts accordingly across the mediolateral axis [70,71], which led to the hypothesis that they act as a set of matched filters for optic flows elicited by rotation of the animal around particular body axes [72,73].…”

Section: Vs Cell Response Propertiesmentioning

confidence: 99%

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Subcellular mapping of dendritic activity in optic flow processing neurons

2014

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i AbstractDendritic integration is a fundamental element of neuronal information processing.So far, few studies have provided a detailed picture of this process, describing the properties of local dendritic activity and its subcellular organization.Here, I used 2--photon calcium imaging in optic flow processing neurons of the blowfly Calliphora vicina to determine the preferred location and direction of local motion cues for small branchlets throughout the entire dendrite. I found a pronounced retinotopic mapping on both the subcellular and the cell population level. In addition, dendritic branchlets residing in different layers of the neuropil were tuned to distinct directions of motion. Within one layer, local preferred directions varied according to the deflections of the ommatidial lattice. Summing the local receptive fields of all dendritic branchlets reproduced the characteristic properties of these neurons' axonal output receptive fields.These results corroborate the notion that the dendritic morphology of vertical system cells allows them to selectively collect local motion inputs with particular directional preferences from a spatially organized input repertoire, thus forming filters that match global patterns of optic flow. These data illustrate a highly structured circuit organization as an efficient way to hard--wire a complex sensory task.

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Section: Vs Cell Response Propertiesmentioning

confidence: 99%

Section: Vs Cell Response Propertiesmentioning

confidence: 99%

Subcellular mapping of dendritic activity in optic flow processing neurons

2014

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“…There, ϳ60 lobula plate tangential cells (LPTCs) per brain hemisphere selectively integrate motion signals provided by local, columnar elements arranged in a retinotopic manner Haag et al, 1992;Single and Borst, 1998). LPTCs can be identified individually because of their invariant anatomy and characteristic visual response properties (Hausen, 1982;Hengstenberg et al, 1982;Borst and Haag, 2002). Among them, cells of the vertical system (VS cells) respond preferentially to vertical motion, whereas cells of the horizontal system (HS cells) are best excited by horizontal motion.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Integration of Binocular Optic Flow by DNOVS2, A Descending Neuron of the Fly

Wertz¹,

Borst²,

Haag³

2008

J. Neurosci.

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For visual orientation and course stabilization, flies rely heavily on the optic flow perceived by the animal during flight. The processing of optic flow is performed in motion-sensitive tangential cells of the lobula plate, which are well described with respect to their visual response properties and the connectivity among them. However, little is known about the postsynaptic descending neurons, which convey motion information to the motor circuits in the thoracic ganglion. Here we investigate the physiology and connectivity of an identified premotor descending neuron, called DNOVS2 (for descending neuron of the ocellar and vertical system). We find that DNOVS2 is tuned in a supralinear way to rotation around the longitudinal body axis. Experiments involving stimulation of the ipsilateral and the contralateral eye indicate that ipsilateral computation of motion information is modified nonlinearly by motion information from the contralateral eye. Performing double recordings of DNOVS2 and lobula plate tangential cells, we find that DNOVS2 is connected ipsilaterally to a subset of vertical-sensitive cells. From the contralateral eye, DNOVS2 receives input most likely from V2, a heterolateral spiking neuron. This specific neural circuit is sufficient for the tuning of DNOVS2, making it probably an important element in optomotor roll movements of the head and body around the fly's longitudinal axis.

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“…The principal output elements of the lobula plate are thought to be the 'horizontal system' (HS) cells and the 'vertical system' (VS) cells. As indicated by their names, they receive information about large-field horizontal (HS cells) and vertical (VS cells) motion which they further transmit onto descending neurons Hausen, 1982a;Hausen, 1982b;Hengstenberg, 1982;Hengstenberg et al, 1982;Krapp et al, 1998;Wertz et al, 2008). Interestingly, however, looking more closely at the response properties of theses neurons reveals that they are not only direction-selective to visual motion but, more specifically, tuned to certain axes of rotation of the fly ( fig. 1.8).…”

Section: Lobula Platementioning

confidence: 99%

“…The LPTCs run perpendicular to the columns, covering many hundreds or thousands of them with their dendrites. The dendrites only obtain input from specific layers of the lobula plate and this explains a large part of the directional selectivity of the particular LPTCs (Hausen, 1982a;Hausen, 1982b;Hengstenberg et al, 1982). Theoretically, it would be possible to build up neurons matching the receptive field properties of VS cells by only using small-field elements.…”

Section: Lobula Platementioning

confidence: 99%

Elementary Motion Detection

2015

Encyclopedia of Computational Neuroscience

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The number and structure of giant vertical cells (VS) in the lobula plate of the blowflyCalliphora erythrocephala

Cited by 151 publications

References 26 publications

Subcellular mapping of dendritic activity in optic flow processing neurons

Subcellular mapping of dendritic activity in optic flow processing neurons

Nonlinear Integration of Binocular Optic Flow by DNOVS2, A Descending Neuron of the Fly

Elementary Motion Detection

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