Direction selectivity of the retinotectal system of fish: Findings based on microelectrode extracellular recordings of the tectum opticum
Vision in fish plays an important role in different forms of visually guided behavior. The visual system of fish is available for research by different methods; it is a convenient experimental model for studying and understanding the mechanisms of vision in general. Responses of retinal direction-se...
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| Format: | Article |
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University of Belgrade, University of Novi Sad
2023-01-01
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| Series: | Archives of Biological Sciences |
| Subjects: | |
| Online Access: | https://doiserbia.nb.rs/img/doi/0354-4664/2023/0354-46642300003D.pdf |
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| author | Damjanović Ilija Aliper Alexey Maximov Paul Zaichikova Alisa Gačić Zoran Maximova Elena |
| author_facet | Damjanović Ilija Aliper Alexey Maximov Paul Zaichikova Alisa Gačić Zoran Maximova Elena |
| author_sort | Damjanović Ilija |
| collection | DOAJ |
| description | Vision in fish plays an important role in different forms of visually guided behavior. The visual system of fish is available for research by different methods; it is a convenient experimental model for studying and understanding the mechanisms of vision in general. Responses of retinal direction-selective (DS) ganglion cells (GCs) are recorded extracellularly from their axon terminals in the superficial layers of the tectum opticum (TO). They can be divided into three distinct groups according to the preferred directions of stimulus movement: caudorostral, dorsoventral and ventrodorsal. Each of these groups comprises both ON and OFF units in equal proportions. Relatively small receptive fields (3-8°) and fine spatial resolution characterize retinal DS units as local motion detectors. Conversely, the responses of direction-selective tectal neurons (DS TNs) are recorded at two different tectal levels, deeper than the zone of retinal DS afferents. They are characterized by large receptive fields (up to 60°) and are indifferent to any sign of contrast, i.e., they can be considered as ON-OFF-type units. Four types of ON-OFF DS TNs preferring different directions of motion have been recorded. The preferred directions of three types of DS TNs match the preferred directions of three types of DS GCs. Matching the three preferred directions of ON and OFF DS GCs and ON-OFF DS TNs has allowed us to hypothesize that the GCs with caudorostral, ventrodorsal and dorsoventral preferences are input neurons for the corresponding types of DS TNs. On the other hand, the rostrocaudal preference in the fourth type of DS TNs, recorded exclusively in the deep tectal zone, is an emergent property of the TO. In this review, our findings are compared with the results of other authors examining direction selectivity in the fish retinotectal system. |
| first_indexed | 2024-03-13T06:24:54Z |
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| issn | 0354-4664 1821-4339 |
| language | English |
| last_indexed | 2024-03-13T06:24:54Z |
| publishDate | 2023-01-01 |
| publisher | University of Belgrade, University of Novi Sad |
| record_format | Article |
| series | Archives of Biological Sciences |
| spelling | doaj.art-8de949acaebd4a22b05b7cd6656bcfdb2023-06-09T10:41:58ZengUniversity of Belgrade, University of Novi SadArchives of Biological Sciences0354-46641821-43392023-01-01751274510.2298/ABS221216003D0354-46642300003DDirection selectivity of the retinotectal system of fish: Findings based on microelectrode extracellular recordings of the tectum opticumDamjanović Ilija0https://orcid.org/0000-0002-8756-3433Aliper Alexey1Maximov Paul2Zaichikova Alisa3Gačić Zoran4https://orcid.org/0000-0002-8940-5033Maximova Elena5Institute for Information Transmission Problems, Russian Academy of Sciences, Moscow, RussiaInstitute for Information Transmission Problems, Russian Academy of Sciences, Moscow, RussiaInstitute for Information Transmission Problems, Russian Academy of Sciences, Moscow, RussiaInstitute for Information Transmission Problems, Russian Academy of Sciences, Moscow, RussiaUniversity of Belgrade, Institute for Multidisciplinary Research, Belgrade, SerbiaInstitute for Information Transmission Problems, Russian Academy of Sciences, Moscow, RussiaVision in fish plays an important role in different forms of visually guided behavior. The visual system of fish is available for research by different methods; it is a convenient experimental model for studying and understanding the mechanisms of vision in general. Responses of retinal direction-selective (DS) ganglion cells (GCs) are recorded extracellularly from their axon terminals in the superficial layers of the tectum opticum (TO). They can be divided into three distinct groups according to the preferred directions of stimulus movement: caudorostral, dorsoventral and ventrodorsal. Each of these groups comprises both ON and OFF units in equal proportions. Relatively small receptive fields (3-8°) and fine spatial resolution characterize retinal DS units as local motion detectors. Conversely, the responses of direction-selective tectal neurons (DS TNs) are recorded at two different tectal levels, deeper than the zone of retinal DS afferents. They are characterized by large receptive fields (up to 60°) and are indifferent to any sign of contrast, i.e., they can be considered as ON-OFF-type units. Four types of ON-OFF DS TNs preferring different directions of motion have been recorded. The preferred directions of three types of DS TNs match the preferred directions of three types of DS GCs. Matching the three preferred directions of ON and OFF DS GCs and ON-OFF DS TNs has allowed us to hypothesize that the GCs with caudorostral, ventrodorsal and dorsoventral preferences are input neurons for the corresponding types of DS TNs. On the other hand, the rostrocaudal preference in the fourth type of DS TNs, recorded exclusively in the deep tectal zone, is an emergent property of the TO. In this review, our findings are compared with the results of other authors examining direction selectivity in the fish retinotectal system.https://doiserbia.nb.rs/img/doi/0354-4664/2023/0354-46642300003D.pdftectum opticummotion detectorsretinal direction-selectivedirection-selective ganglion cellsdirection-selective tectal neurons |
| spellingShingle | Damjanović Ilija Aliper Alexey Maximov Paul Zaichikova Alisa Gačić Zoran Maximova Elena Direction selectivity of the retinotectal system of fish: Findings based on microelectrode extracellular recordings of the tectum opticum Archives of Biological Sciences tectum opticum motion detectors retinal direction-selective direction-selective ganglion cells direction-selective tectal neurons |
| title | Direction selectivity of the retinotectal system of fish: Findings based on microelectrode extracellular recordings of the tectum opticum |
| title_full | Direction selectivity of the retinotectal system of fish: Findings based on microelectrode extracellular recordings of the tectum opticum |
| title_fullStr | Direction selectivity of the retinotectal system of fish: Findings based on microelectrode extracellular recordings of the tectum opticum |
| title_full_unstemmed | Direction selectivity of the retinotectal system of fish: Findings based on microelectrode extracellular recordings of the tectum opticum |
| title_short | Direction selectivity of the retinotectal system of fish: Findings based on microelectrode extracellular recordings of the tectum opticum |
| title_sort | direction selectivity of the retinotectal system of fish findings based on microelectrode extracellular recordings of the tectum opticum |
| topic | tectum opticum motion detectors retinal direction-selective direction-selective ganglion cells direction-selective tectal neurons |
| url | https://doiserbia.nb.rs/img/doi/0354-4664/2023/0354-46642300003D.pdf |
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