Quantitative analysis of tooth pulp afferent terminals in the rat brain stem

Quantitative analysis of tooth pulp afferent terminals in the rat brain stem

This study analyzed quantitatively the ultrastructural features of tooth pulp afferent terminals and their presynaptic axonal endings (p-endings) in the trigeminal principal (Vp), dorsomedial oral (Vdm), and caudal nuclei (Vc). Mitochondrial volume, active zone area, apposed surface area, and vesicl...

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Bibliographic Details
Published in:Neuroreport Vol. 15; no. 16; pp. 2485 - 2489
Main Authors: BaeCA, Yong Chul, Paik, Sang Kyoo, Park, Kuk Pil, Ma, Su Kyung, Jin, Jong Gil, Ahn, Dong Kuk, Kim, Sung Kyo, Moritani, Masayuki, Yoshida, Atsushi
Format: Journal Article
Language:English
Published: Hagerstown, MD Lippincott Williams & Wilkins, Inc 15-11-2004
Lippincott Williams and Wilkins
Subjects:
Afferent Pathways - ultrastructure
Animals
Biological and medical sciences
Brain Stem - ultrastructure
Cell Count
Dental Pulp - innervation
Fundamental and applied biological sciences. Psychology
Male
Microscopy, Electron, Transmission - methods
Mitochondria - genetics
Mitochondria - ultrastructure
Mouth. Exocrine and endocrine salivary glands. Teeth. Esophagus
Presynaptic Terminals - metabolism
Presynaptic Terminals - ultrastructure
Rats
Vertebrates: digestive system
Wheat Germ Agglutinin-Horseradish Peroxidase Conjugate - metabolism
Rat
Brain stem
Rodentia
Central nervous system
Encephalon
Vertebrata
Mammalia
Ultrastructure
Afferent projection
Trigeminal nucleus
Tooth
Quantitative analysis
Dental pulp
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Summary:This study analyzed quantitatively the ultrastructural features of tooth pulp afferent terminals and their presynaptic axonal endings (p-endings) in the trigeminal principal (Vp), dorsomedial oral (Vdm), and caudal nuclei (Vc). Mitochondrial volume, active zone area, apposed surface area, and vesicle number were highly correlated with afferent bouton volume. The afferent bouton volume varied widely in Vp, compared to that in Vdm and Vc. The values of all parameters of p-endings were within a narrow range, and were smaller than those of afferent boutons. The afferent bouton volume correlated with the number of postsynaptic dendrites and p-endings. These results suggest that pulpal afferent information is regulated in a unique manner in the each trigeminal sensory nucleus.
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ISSN:0959-4965
1473-558X
DOI:10.1097/00001756-200411150-00011