Abstract:
:The spinotectal somatosensory projection was compared in normal, genetically eyeless, and embryonically manipulated salamanders. In normal animals, serotonin fluorescence was restricted to the intermediate tectalneuropil. This same region showed both high levels of serotonin uptake and somatosensory single unit electrical activity. In mutant eyeless salamanders and in normal animals enucleated early in development, serotonin fluorescence, serotonin uptake, and somatosensory activity were present in the superficial tectal neuropil. One-eyed animals, either genetically normal axolotls with one eye enucleated embryonically or genetically eyeless animals in which a normal eye had been transplanted, showed normal intermediate serotonin fluroescence and somatosensory physiology in the visually innervated half-tectum. In the visually uninnervated half-tectum, they showed superficial serotonin fluorescence and somatosensory physiology. In normal animals, 5,7-dihydroxytryptamine (5,7-DHT), a specific poison for serotonergic fibers, eliminated physiological responses in the contralateral somatosensory tectal region. The 5,7-DHT poisoning also abolished U.V.-induced serotonin fluorescence in the intermediate tectal neuropil. These results are discussed in terms of (1) evidence for serotonin as a central neurotransmitter for somatosensory information in the tectum, (2) the effects of eyelessness on tectal organization, and (3) related results in other animals.
journal_name
J Morpholjournal_title
Journal of morphologyauthors
Gruberg ER,Harris WAdoi
10.1002/jmor.1051700105subject
Has Abstractpub_date
1981-10-01 00:00:00pages
55-69issue
1eissn
0362-2525issn
1097-4687journal_volume
170pub_type
杂志文章abstract::The jaw muscle (i.e., masticatory, suprahyoid, and extrinsic tongue) anatomy and mass were examined in four genera of Old World hamsters (cricetine murids), Mesocricetus, Cricetulus, Tscherskia, and Phodopus. The masseter was the largest and most complicated of the muscles examined. In the superficial layer, a few ven...
journal_title:Journal of morphology
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journal_title:Journal of morphology
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journal_title:Journal of morphology
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journal_title:Journal of morphology
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journal_title:Journal of morphology
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更新日期:1989-02-01 00:00:00
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journal_title:Journal of morphology
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journal_title:Journal of morphology
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journal_title:Journal of morphology
pub_type: 杂志文章
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更新日期:2007-02-01 00:00:00
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journal_title:Journal of morphology
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journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051580106
更新日期:1978-10-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
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更新日期:2005-06-01 00:00:00
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journal_title:Journal of morphology
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更新日期:2015-08-01 00:00:00
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journal_title:Journal of morphology
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更新日期:1974-12-01 00:00:00
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journal_title:Journal of morphology
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journal_title:Journal of morphology
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journal_title:Journal of morphology
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journal_title:Journal of morphology
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journal_title:Journal of morphology
pub_type: 杂志文章
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journal_title:Journal of morphology
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更新日期:1980-07-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
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更新日期:1978-05-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
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journal_title:Journal of morphology
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更新日期:2009-03-01 00:00:00
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journal_title:Journal of morphology
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更新日期:1999-10-01 00:00:00
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journal_title:Journal of morphology
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更新日期:1997-08-01 00:00:00
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journal_title:Journal of morphology
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更新日期:2010-09-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10319
更新日期:2005-04-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051930208
更新日期:1987-08-01 00:00:00