KFU. Card publication. The brain structure of selected trypanorhynch tapeworms.

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FEDERAL UNIVERSITY

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THE BRAIN STRUCTURE OF SELECTED TRYPANORHYNCH TAPEWORMS.

Form of presentation

Articles in international journals and collections

Year of publication

2020

Язык

английский

Authors, employees of KFU

Biserova Natalya Mikhaylovna, author

Other authors

Polyakova Tatyana Alekseevna, author

Bibliographic description in the original language

Biserova NM, Korneva JV, Polyakova TA. 2020. The brain structure of selected trypanorhynch tapeworms. Journal of Morphology. V.281. (8). P.1-21 https://doi.org/10.1002/jmor.21145

Annotation

The brain architecture in four species of tapeworms from the order Trypanorhyncha has been studied. In all species, the brain consists of paired anterior and lateral lobes, and an unpaired central lobe. The anterior lobes connect by dorsal and ventral semicircular commissures; the central and lateral lobes connect by a median and an X-shaped crisscross commissure. In the center of the brain, five well-developed compact neuropils are present. The brain occupies a medial position in the scolex pars bothrialis. The ventral excretory vessels are situated outside the lateral lobes of the brain; the dorsal excretory vessels are located inside the brain and dorsal to the median commissure. The brain gives rize four anterior proboscis nerves and four posterior bulbar nerves with myelinated giant axons (GAs). The cell bodies of the GAs are located within the X-commissure and in the bulbar nerves. Highly developed serotonergic neuropils are present in the anterior and lateral lobes; numerous 5-HT neurons are found in the brain lobes including the central unpaired lobe. The X-cross commissure consists of the α-tub-immunoreactive and 5-HT-IR neurites. Eight ultrastructural types of neurons were found in the brain of the three species investigated. In addition, different types of synapses were present in the neuropils. Glial cells ensheath the brain lobes, the neuropils, the GAs, and the bulbar nerves. Glia cell processes form complex branching patterns of thin cytoplasmic sheets sandwiched between adjacent neural processes and filling the space between neurons. Multilayer myelin-like envelopes and a mesaxon-like structure have been found in Trypanorhyncha nervous system. We compared the brain architecture of Trypanorhyncha with that of an early basal cestode taxon, that is, Diphyllobothriidea, and present a hypothesis about the homology of the anterior brain lobes in order Trypanorhyncha; and the lateral lobes and median commissure are homologous brain structures within Eucestoda

Keywords

Glial cells, brain lobes, neuropils, giant axons, bulbar nerves, 5-HT neurons, Cestoda, ultrastructure

The name of the journal

Journal of Morphology

URL

https://onlinelibrary.wiley.com/doi/abs/10.1002/jmor.21145

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=264758&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Biserova Natalya Mikhaylovna	ru_RU
dc.contributor.author	Polyakova Tatyana Alekseevna	ru_RU
dc.date.accessioned	2020-01-01T00:00:00Z	ru_RU
dc.date.available	2020-01-01T00:00:00Z	ru_RU
dc.date.issued	2020	ru_RU
dc.identifier.citation	Biserova NM, Korneva JV, Polyakova TA. 2020. The brain structure of selected trypanorhynch tapeworms. Journal of Morphology. V.281. (8). P.1-21 https://doi.org/10.1002/jmor.21145	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=264758&p_lang=2	ru_RU
dc.description.abstract	Journal of Morphology	ru_RU
dc.description.abstract	The brain architecture in four species of tapeworms from the order Trypanorhyncha has been studied. In all species, the brain consists of paired anterior and lateral lobes, and an unpaired central lobe. The anterior lobes connect by dorsal and ventral semicircular commissures; the central and lateral lobes connect by a median and an X-shaped crisscross commissure. In the center of the brain, five well-developed compact neuropils are present. The brain occupies a medial position in the scolex pars bothrialis. The ventral excretory vessels are situated outside the lateral lobes of the brain; the dorsal excretory vessels are located inside the brain and dorsal to the median commissure. The brain gives rize four anterior proboscis nerves and four posterior bulbar nerves with myelinated giant axons (GAs). The cell bodies of the GAs are located within the X-commissure and in the bulbar nerves. Highly developed serotonergic neuropils are present in the anterior and lateral lobes; numerous 5-HT neurons are found in the brain lobes including the central unpaired lobe. The X-cross commissure consists of the α-tub-immunoreactive and 5-HT-IR neurites. Eight ultrastructural types of neurons were found in the brain of the three species investigated. In addition, different types of synapses were present in the neuropils. Glial cells ensheath the brain lobes, the neuropils, the GAs, and the bulbar nerves. Glia cell processes form complex branching patterns of thin cytoplasmic sheets sandwiched between adjacent neural processes and filling the space between neurons. Multilayer myelin-like envelopes and a mesaxon-like structure have been found in Trypanorhyncha nervous system. We compared the brain architecture of Trypanorhyncha with that of an early basal cestode taxon, that is, Diphyllobothriidea, and present a hypothesis about the homology of the anterior brain lobes in order Trypanorhyncha; and the lateral lobes and median commissure are homologous brain structures within Eucestoda	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Glial cells	ru_RU
dc.subject	brain lobes	ru_RU
dc.subject	neuropils	ru_RU
dc.subject	giant axons	ru_RU
dc.subject	bulbar nerves	ru_RU
dc.subject	5-HT neurons	ru_RU
dc.subject	Cestoda	ru_RU
dc.subject	ultrastructure	ru_RU
dc.title	The brain structure of selected trypanorhynch tapeworms.	ru_RU
dc.type	Articles in international journals and collections	ru_RU