کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4328977 1614195 2008 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Posterior lateral hypothalamic axon terminals are in contact with trigeminal premotor neurons in the parvicellular reticular formation of the rat medulla oblongata
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
Posterior lateral hypothalamic axon terminals are in contact with trigeminal premotor neurons in the parvicellular reticular formation of the rat medulla oblongata
چکیده انگلیسی
This study was performed to understand the anatomical substrates of hypothalamic modulation of jaw movements. After cholera toxin B subunit (CTb) injection into the parvicellular reticular formation (RFp) of the rat medulla oblongata, where many trigeminal premotor neurons have been known to exist, numerous CTb-labeled neurons were found in the posterior lateral hypothalamus (PLH) bilaterally with a clear-cut ipsilateral dominance. After ipsilateral injections of biotinylated dextran amine (BDA) into the PLH and CTb into the motor trigeminal nucleus (Vm), the prominent distribution of BDA-labeled axon terminals around CTb-labeled neurons was found in the RFp region just ventral to the nucleus of the solitary tract and medial to the spinal trigeminal nucleus ipsilateral to the injection sites. Within the neuropil of the RFp, BDA-labeled axon terminals made an asymmetrical synaptic contact predominantly with dendrites and additionally with somata of the RFp neurons, some of which were labeled with CTb. It was further revealed that these BDA-labeled axon terminals were immunoreactive for vesicular glutamate transporter 2. The present data suggest that the PLH plays an important role in the control of jaw movements by exerting its glutamatergic excitatory action upon RFp neurons presynaptic to trigeminal motoneurons.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Brain Research - Volume 1244, 9 December 2008, Pages 71-81
نویسندگان
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