Distribution of nociceptive neurons in the ventrobasal complex of macaque thalamus. 1998

N Koyama, and Y Nishikawa, and T Yokota
Department of Physiology, Shiga University of Medical Science, Seta, Otsu, Japan. koyama@belle.shiga-med.ac.jp

In urethane-chloralose anesthetized Japanese macaques, the distribution of nociceptive neurons within the thalamic ventrobasal (VB) complex was studied. Nociceptive specific (NS) and wide dynamic range (WDR) neurons were found in the periphery of the contralateral integument compartment of the VB complex. Thus, they formed a shell at the perimeter of this compartment with a somatotopic organization. The compartment consisted of large parts of nucleus ventralis posteromedialis (VPM) and nucleus ventralis posterolateralis, pars caudalis (VPLc). NS neurons were located more caudally than WDR neurons. In the NS zone of VPM, the forehead was represented caudally, and oral structures rostrally. In the ventral NS zone of VPM, there was a sequential representation of the tongue, gum and mandibular skin from the medial to the lateral edge. The hand was represented medially in the NS zone of VPLc, and its representation dominated in the rostral NS zone. There was a sequential representation of the cervical, thoracic, lumbar, sacral and caudal segments mediolaterally along the dorsal VPLc. In the medial half of ventral NS zone of VPLc, the upper body half was represented, and in the lateral half, the lower body half. The foot was represented at or near the medial edge of lateral half. In the rostral WDR zone, the trunk and peripheral face were represented.

UI MeSH Term Description Entries
D008251 Macaca A genus of the subfamily CERCOPITHECINAE, family CERCOPITHECIDAE, consisting of 16 species inhabiting forests of Africa, Asia, and the islands of Borneo, Philippines, and Celebes. Ape, Barbary,Ape, Black,Ape, Celebes,Barbary Ape,Black Ape,Celebes Ape,Macaque,Apes, Barbary,Apes, Black,Apes, Celebes,Barbary Apes,Black Apes,Celebes Apes,Macacas,Macaques
D008839 Microelectrodes Electrodes with an extremely small tip, used in a voltage clamp or other apparatus to stimulate or record bioelectric potentials of single cells intracellularly or extracellularly. (Dorland, 28th ed) Electrodes, Miniaturized,Electrode, Miniaturized,Microelectrode,Miniaturized Electrode,Miniaturized Electrodes
D009474 Neurons The basic cellular units of nervous tissue. Each neuron consists of a body, an axon, and dendrites. Their purpose is to receive, conduct, and transmit impulses in the NERVOUS SYSTEM. Nerve Cells,Cell, Nerve,Cells, Nerve,Nerve Cell,Neuron
D010146 Pain An unpleasant sensation induced by noxious stimuli which are detected by NERVE ENDINGS of NOCICEPTIVE NEURONS. Suffering, Physical,Ache,Pain, Burning,Pain, Crushing,Pain, Migratory,Pain, Radiating,Pain, Splitting,Aches,Burning Pain,Burning Pains,Crushing Pain,Crushing Pains,Migratory Pain,Migratory Pains,Pains, Burning,Pains, Crushing,Pains, Migratory,Pains, Radiating,Pains, Splitting,Physical Suffering,Physical Sufferings,Radiating Pain,Radiating Pains,Splitting Pain,Splitting Pains,Sufferings, Physical
D004594 Electrophysiology The study of the generation and behavior of electrical charges in living organisms particularly the nervous system and the effects of electricity on living organisms.
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D013788 Thalamus Paired bodies containing mostly GRAY MATTER and forming part of the lateral wall of the THIRD VENTRICLE of the brain. Thalamencephalon,Thalamencephalons
D014276 Trigeminal Nerve The 5th and largest cranial nerve. The trigeminal nerve is a mixed motor and sensory nerve. The larger sensory part forms the ophthalmic, mandibular, and maxillary nerves which carry afferents sensitive to external or internal stimuli from the skin, muscles, and joints of the face and mouth and from the teeth. Most of these fibers originate from cells of the TRIGEMINAL GANGLION and project to the TRIGEMINAL NUCLEUS of the brain stem. The smaller motor part arises from the brain stem trigeminal motor nucleus and innervates the muscles of mastication. Cranial Nerve V,Fifth Cranial Nerve,Nerve V,Nervus Trigeminus,Cranial Nerve, Fifth,Fifth Cranial Nerves,Nerve V, Cranial,Nerve Vs,Nerve, Fifth Cranial,Nerve, Trigeminal,Trigeminal Nerves,Trigeminus, Nervus
D014278 Trigeminal Nuclei Nuclei of the trigeminal nerve situated in the brain stem. They include the nucleus of the spinal trigeminal tract (TRIGEMINAL NUCLEUS, SPINAL), the principal sensory nucleus, the mesencephalic nucleus, and the motor nucleus. Trigeminal Nuclear Complex,Nuclear Complex, Trigeminal,Nuclear Complices, Trigeminal,Nuclei, Trigeminal,Nucleus, Trigeminal,Trigeminal Nuclear Complices,Trigeminal Nucleus

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