caa a22 4500 477095941 CHVBK 20180405111527.0 cr unu---uuuuu 170330e19960901xx s 000 0 eng 10.1007/BF00187131 doi (NATIONALLICENCE)springer-10.1007/BF00187131 Developmental pattern of axonal pathways in the house shrew maxillary nerve [Elektronische Daten] [Kinya Yasui, Rieko Arakaki, Masanori Uemura, Shigenori Tanaka] The topographic patterns of peripheral receptors and effectors seem to contribute to the construction of the neuronal circuit in the central nervous system (CNS) in mammals. Many patterns replicating those of the periphery have been found in the CNS, and fasciculation has been regarded as having a central role in the pattern replication. The house shrew, Suncus murinus, is an excellent species in which to study this topic because it has a vibrissae system arranged in a single ordered fashion and extraordinarily well-developed trigeminal spinal tracts. Using immunostaining and retrograde-tracing techniques, we examined the developmental pattern of the maxillary nervous system in the house shrew. The results indicate that the basic pattern of axonal extension reiterates with a parallel arrangement throughout the course of development except at a site in the brainstem where the central processes bifurcate into ascending and descending branches. Dorsoventral inversion of the peripheral pattern in the spinal tract occurs with this dualleveled bifurcation in association with the mediolaterally ordered entry of the central processes into the brainstem. The basic pattern of the central processes is established prior to the appearance of the vibrissae, indicating that the basic topographic pattern of the maxillary nerve is not related to the vibrissae system. The fasciculation pattern does not correspond to the overall layout of the arrays of vibrissae, and there are frequent exchanges of axons between fascicles both in the periphery and centrally. The parallel organization of the majority of the processes, together with the free exchange of processes between fascicles, suggests that these processes have an important role in the formation of the fasciculation and somatotopic patterns. Springer-Verlag, 1996 Suncus murinus nationallicence Somatotopy nationallicence Vibrissae nationallicence Fasciculation nationallicence Sensory system nationallicence Yasui Kinya Department of Oral Anatomy, 1, Kagoshima University Dental School, 8-35-1 Sakuragoaka, 890, Kagoshima, Japan aut Arakaki Rieko Department of Microbiology and Immunology, Kagoshima University Dental School, 8-35-1 Sakuragoaka, 890, Kagoshima, Japan aut Uemura Masanori Department of Oral Anatomy, 1, Kagoshima University Dental School, 8-35-1 Sakuragoaka, 890, Kagoshima, Japan aut Tanaka Shigenori Department of Anatomy, University of Kanazawa, 13-1 Takaramachi, 290, Kanazawa, Japan aut Anatomy and Embryology Springer-Verlag 194/3(1996-09-01), 205-213 0340-2061 194:3<205 1996 194 429 https://doi.org/10.1007/BF00187131 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00187131 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yasui Kinya Department of Oral Anatomy, 1, Kagoshima University Dental School, 8-35-1 Sakuragoaka, 890, Kagoshima, Japan aut NATIONALLICENCE 700 1- Arakaki Rieko Department of Microbiology and Immunology, Kagoshima University Dental School, 8-35-1 Sakuragoaka, 890, Kagoshima, Japan aut NATIONALLICENCE 700 1- Uemura Masanori Department of Oral Anatomy, 1, Kagoshima University Dental School, 8-35-1 Sakuragoaka, 890, Kagoshima, Japan aut NATIONALLICENCE 700 1- Tanaka Shigenori Department of Anatomy, University of Kanazawa, 13-1 Takaramachi, 290, Kanazawa, Japan aut NATIONALLICENCE 773 0- Anatomy and Embryology Springer-Verlag 194/3(1996-09-01), 205-213 0340-2061 194:3<205 1996 194 429 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer