Topographic representation of lower and upper teeth within the trigeminal sensory nuclei of adult cat as demonstrated by the transganglionic transport of horseradish peroxidase

The Journal of Comparative Neurology
Y ShigenagaY Dateoka

Abstract

Transganglionic transport of horseradish peroxidase-wheat germ agglutinin conjugate (HRP-WGA) entrapped in hypoallergenic polyacrylamide gel was used to study the patterns of termination of primary afferents that innervate the lower and upper tooth pulps within the trigeminal sensory nuclear complex (TSNC). HRP injections were made into the inferior and superior alveolar nerves in order to compare the central projections of the whole nerve with those from tooth pulps. In addition, the relationship between the distribution of the trigeminothalamic tract cells and the projection sites of the tooth pulp afferents was investigated by injecting HRP into the posterior ventral thalamus. HRP-labeled tooth pulp afferent fibers innervating the lower and upper teeth projected to the subnucleus dorsalis (Vpd) of pars principalis, the rostrodorsomedial part (Vo.r) and nucleus dorsomedialis (Vo.dm) of pars oralis, the medial regions of pars interpolaris, and laminae I, II, and V of pars caudalis. Terminal fields of the lower tooth pulp afferents formed a rostrocaudally running, uninterrupted column from the midlevel of Vpd to the caudal tip of caudalis. In contrast, the column of termination of upper tooth pulp afferents was discontinuous at...Continue Reading

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Citations

Nov 21, 2000·Archives of Oral Biology·J Paphangkorakit, J W Osborn
Dec 14, 2006·The American Journal of Chinese Medicine·Ji-Yeon JungWon-Jae Kim
Apr 12, 2005·Brain, Behavior and Evolution·Christopher D MarshallSusan W Herring
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Jun 18, 2003·The Journal of Comparative Neurology·Yong Chul BaeYoshio Shigenaga
May 10, 2005·The Journal of Comparative Neurology·Fawzia Zerari-MaillyAnne Nosjean

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