Amygdaloid axon terminals are in contact with trigeminal premotor neurons in the parvicellular reticular formation of the rat medulla oblongata

Brain Research
Yukihiko YasuiShigefumi Yokota

Abstract

After ipsilateral injections of biotinylated dextran amine (BDA) into the central nucleus of the amygdala (ACe) and cholera toxin B subunit (CTb) into the motor trigeminal nucleus (Vm) in the rat, numerous BDA-labeled axons with bouton-like varicosities were distributed bilaterally with a clear-cut ipsilateral dominance in the parvicellular reticular formation (RFp), where many CTb-labeled neurons existed bilaterally with slightly ipsilateral dominance. The prominent overlapping distribution of these labeled axons and neurons was found in the RFp region just ventral to the nucleus of the solitary tract and medial to the spinal trigeminal nucleus throughout the caudalmost part of the pons and the rostral half of the medulla oblongata. Within the neuropil of the RFp region in the rostral half of the medulla oblongata, BDA-labeled axons made symmetrical synaptic contacts predominantly with the dendrites and additionally with the somata of RFp neurons, some of which were labeled with CTb. These data suggest that output signals from the ACe may be transmitted disynaptically to the Vm via the RFp neurons in the medulla oblongata for the control of jaw movements.

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Citations

Jul 11, 2006·Neuropsychopharmacology : Official Publication of the American College of Neuropsychopharmacology·Marco CecchiHuda Akil
Sep 24, 2011·Pain Medicine : the Official Journal of the American Academy of Pain Medicine·Volker BuschPeter Eichhammer
Nov 6, 2007·Experimental Physiology·Joel C Geerling, Arthur D Loewy
Feb 4, 2010·European Journal of Oral Sciences·Marcelo B MascaroCarol F Elias
Feb 22, 2011·Annals of Anatomy = Anatomischer Anzeiger : Official Organ of the Anatomische Gesellschaft·Nikolai E LazarovAndreas Wree
Dec 8, 2009·Brain Research·Tomoko IshizukaKiyoshi Ohura
May 20, 2008·Experimental Physiology·Ikuo Homma, Yuri Masaoka
Jan 25, 2011·Journal of Neuroscience Research·Simon J FungMichael H Chase
Jul 10, 2012·Journal of Dental Research·M NonakaT Inoue
Jun 13, 2021·Neuroscience and Biobehavioral Reviews·Dominik A EttlinJuliana Trindade Clemente-Napimoga

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