Somatotopic Organization of Primary Afferent Perikarya of the Guinea-pig Extraocular Muscles in the Trigeminal Ganglion: a Post-mortem DiI-tracing Study
Experimental Eye Research, ISSN: 0014-4835, Vol: 70, Issue: 4, Page: 411-418
2000
- 12Citations
- 8Captures
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Metrics Details
- Citations12
- Citation Indexes12
- 12
- CrossRef11
- Captures8
- Readers8
Article Description
Apart from the somatotopic organization of the trigeminal ganglion (TG) into the ophthalmic, maxillary and mandibular divisions along the mediolateral axis, there exist further somatotopic organizations within these three divisions. According to literature, the cell organization in the TG and the somatotopy in the brainstem develop together, formed by naturally occurring cell death in the TG. Thus, the somatotopy of the primary afferent trigeminal perikarya is of special interest. The aim of this study was to investigate the location of the primary afferent perikarya of the extraocular muscles (EOMs) in the TG of guinea-pig. The primary afferent perikarya were labeled by post-mortem application of the carbocyanine DiI on the oculomotor nerve branches near their entrance into the single EOMs. The DiI-positive perikarya were found musculo-somatically organized in the ipsilateral ophthalmic part of the TG at a wide range along the dorsoventral axis, expressing an overlap of the representation areas. The primary afferent perikarya of the superior rectus and the superior oblique muscles were mainly localized in the dorsal part of the ganglion while those of the inferior rectus and the inferior oblique muscle mainly in ventral part. The lateral and the medial rectus were predominantly represented in between. An organization along the mediolateral axis of the TG was not observed.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S001448359990828X; http://dx.doi.org/10.1006/exer.1999.0828; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0033836779&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/10865989; https://linkinghub.elsevier.com/retrieve/pii/S001448359990828X; https://dx.doi.org/10.1006/exer.1999.0828
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