Journal ArticleDOI
Somatosensory nuclei in the brainstem of the rat: independent projections to the thalamus and cerebellum.
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TLDR
The dorsal column nuclei and the sensory trigeminal nuclei project not only to the ventrobasal thalamus but also to the cerebellum, and the numbers and distribution of neurones projecting to these two regions were examined.Abstract:
The dorsal column nuclei and the sensory trigeminal nuclei project not only to the ventrobasal thalamus but also to the cerebellum. In this study the numbers and distribution of neurones projecting to these two regions were examined for the following nuclei: the rostral part of the main cuneate nucleus, the external cuneate nucleus, nucleus x, the principal sensory nucleus of the trigeminal nerve, and the oral, interpolar, and caudal subnuclei of the spinal nucleus of the trigeminal nerve. A thalamic projection from nucleus x and from the external cuneate nucleus was confirmed, and a distinct group of neurones projecting to the ventroposteromedial thalamus was distinguished near the ventromedial aspect of the principal sensory nucleus. Of the 165,000 neurones examined, only one was found to be double labelled. It was concluded that the populations of neurones that project to the ventrobasal thalamus and to the cerebellum are separate, and that somatosensory neurones in the brainstem do not send axon collaterals to both regions.read more
Citations
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Journal ArticleDOI
Central distribution of trigeminal and upper cervical primary afferents in the rat studied by anterograde transport of horseradish peroxidase conjugated to wheat germ agglutinin.
Kristian Pfaller,Jan Arvidsson +1 more
TL;DR: Comparisons of the central projection fields of trigeminal and upper cervical primary afferents indicated a somatotopic organization but with a certain degree of overlap.
Journal ArticleDOI
Trigeminal primary afferent projections to “non-trigeminal” areas of the rat central nervous system
TL;DR: It is demonstrated that somatosensory information from the head and face may be transmitted directly to widespread and functionally heterogeneous areas of the rat central nervous system, including the spinal cord dorsal horn, numerous brainstem nuclei, and the cerebellum.
Journal ArticleDOI
Invited Review Anatomical loops and their electrical dynamics in relation to whisking by rat
TL;DR: The evidence implies that there is fast signaling from the facial nucleus, through the mystacial pad and the vibrissae and up through sensory cortex, but only slow signaling at the level of the motor cortex and down through the superior colliculus to the Facial nucleus.
Journal ArticleDOI
Activity of deep cerebellar nuclear cells during classical conditioning of nictitating membrane extension in rabbits.
Neil E. Berthier,John W. Moore +1 more
TL;DR: The activity of neurons in the interposed and dentate nuclei of the cerebellum was investigated during differential classical conditioning of the rabbit eye blink/ nictitating membrane response, finding cells whose responses paralleled the CR may be involved in the initiation or modulation of the CR, while those whose responses were time-locked to the CS may be involvement in sensory processing underlying the initiation of the movement.
Journal ArticleDOI
Trigeminal projections to the nucleus submedius of the thalamus in the rat.
TL;DR: Results suggest that the Sm of the rat receives its orofacial afferent inputs from brainstem neurons that are localized to the caudal interpolaris and rostral caudalis in the central processing of pain.
References
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The Rat Brain in Stereotaxic Coordinates
George Paxinos,Charles Watson +1 more
TL;DR: This paper presents a meta-analyses of the determinants of earthquake-triggered landsliding in the Czech Republic over a period of 18 months in order to establish a probabilistic framework for estimating the intensity of the earthquake.
Journal ArticleDOI
Tetramethyl benzidine for horseradish peroxidase neurohistochemistry: a non-carcinogenic blue reaction product with superior sensitivity for visualizing neural afferents and efferents.:
TL;DR: The sensitivity of this new method in demonstrating retrograde transport is markedly superior to that of the previously described benzidine dihydrochloride method and, as a consequence, many efferent connections of the injection site are also visualized.
Journal ArticleDOI
Double retrograde neuronal labeling through divergent axon collaterals, using two fluorescent tracers with the same excitation wavelength which label different features of the cell
TL;DR: Neurons which are retrogradely double-labeled with these tracer combinations can be successfully used to demonstrate the existence of divergent axon collaterals in the brain.
Journal ArticleDOI
Additional Factors Influencing Sensitivity in the Tetramethyl Benzidine Method for Horseradish Peroxidase Neurohistochemistry
M.-Marsel Mesulam,E Hegarty,Helen Barbas,K A Carson,E C Gower,A G Knapp,Mark B. Moss,E J Mufson +7 more
TL;DR: In experiments that use horseradish peroxidase (HRP) and tetramethyl benzidine (TMB) for tracing neural connections, the activity of tissue-bound enzyme as well as the stability of the resultant reaction product are influenced by the duration of storage, the composition of the storage medium, the type of counterstaining and even the details of histological dehydration.