کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4327740 | 1614141 | 2009 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Unmyelinated fibers of the anterior ethmoidal nerve in the rat co-localize with neurons in the medullary dorsal horn and ventrolateral medulla activated by nasal stimulation
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کلمات کلیدی
CTB-HRPanterior ethmoidal nerveSp5IAENParatrigeminal nucleusMe5WGA-HRPWGATMBIB4MDHNTSRVLMSDHHRPCTBBSA - BSASp5 - sp5rostral ventrolateral medulla - آرام آرامbovine serum albumin - آلبومین سرم گاوtetramethylbenzidine - تترامتیل بنزیدینSpinal trigeminal tract - تریژمنیال ستون فقراتmedullary dorsal horn - شاخ پشتی مدولارSpinal dorsal horn - شاخ پشتی نخاعیHeart rate - ضربان قلبmean arterial blood pressure - فشار خون شریانیBötzinger complex - مجموعه بوستینگرrespiratory rate - نرخ تنفسmap - نقشهnucleus ambiguus - هسته ابهامnucleus tractus solitarius - هسته دستگاه انفرادیMesencephalic trigeminal nucleus - هسته سه هسته ای Mesencephalicfacial nucleus - هسته چهرهDiving response - پاسخ غواصیHorseradish peroxidase - پراکسیداز هوررادیشWheat germ agglutinin - گیاه گندم آگلوتیینین
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Unmyelinated fibers of the anterior ethmoidal nerve in the rat co-localize with neurons in the medullary dorsal horn and ventrolateral medulla activated by nasal stimulation Unmyelinated fibers of the anterior ethmoidal nerve in the rat co-localize with neurons in the medullary dorsal horn and ventrolateral medulla activated by nasal stimulation](/preview/png/4327740.png)
چکیده انگلیسی
The anterior ethmoidal nerve (AEN) innervates the nasal passages and external nares, and serves as the afferent limb of the nasopharyngeal and diving responses. However, although 65% of the AEN is composed of unmyelinated fibers, it has not been determined whether this afferent signal is carried by unmyelinated or myelinated fibers. We used the transganglionic tracers WGA-HRP, IB4-HRP, and CTB-HRP to trace the central projections of the AEN of the rat. Interpretation of the labeling patterns suggests that AEN unmyelinated fibers project primarily to the ventral tip of the ipsilateral medullary dorsal horn (MDH) at the level of the area postrema. Other unmyelinated projections were to the ventral paratrigeminal nucleus and ventrolateral medulla, specifically the Bötzinger and RVLM/C1 regions. Myelinated AEN fibers projected to the ventral paratrigeminal and mesencephalic trigeminal nuclei. Stimulating the nasal passages of urethane-anesthetized rats with ammonia vapors produced the nasopharyngeal response that included apnea, bradycardia and an increase in arterial blood pressure. Central projections of the AEN co-localized with neurons within both MDH and RVLM/C1 that were activated by nasal stimulation. Within the ventral MDH the density of AEN terminal projections positively correlated with the rostral-caudal location of activated neurons, especially at and just caudal to the obex. We conclude that unmyelinated AEN terminal projections are involved in the activation of neurons in the MDH and ventrolateral medulla that participate in the nasopharyngeal response in the rat. We also found that IB4-HRP was a much less robust tracer than WGA-HRP.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Brain Research - Volume 1298, 28 October 2009, Pages 131-144
Journal: Brain Research - Volume 1298, 28 October 2009, Pages 131-144
نویسندگان
Michael P. Hollandsworth, Karyn M. DiNovo, Paul F. McCulloch,