Somatotopic projections of each maxillary molar tooth were defined by injecting individual teeth with True blue and plotting the location of fluorescent cells in sections of the trigeminal ganglia. Collateral branching was investigated by injecting True blue and Diamidino yellow into pairs of maxillary molar teeth and examining the ganglia for double labelled cells. Maxillary molar teeth project to the lateral ophthalmomaxillary region of the ipsilateral ganglion with extensive overlap of the projections from individual teeth. Double labelling with both dyes demonstrated considerable collateral branching from single trigeminal ganglion cells to the molar teeth.
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The corresponding record at NLM can be accessed at https://www.ncbi.nlm.nih.gov/pubmed/2306620