Muhammad Saeed.
Nissl study of lower motor neurons of mylohyoid muscle.
Pak J Med Sci Jan ;19(2):114-7.

Objective: To determine the somatotopic organization of lower motor neurons of the mylohyoid muscle in the motor trigeminal nucleus. Design: Histological study of the rat hind-brain by fluorescence microscopy and Nissl staining. Setting: Neuro-histological laboratory, College of Medicine, King Saud University, Riyadh, Kingdom of Saudi Arabia. Materials: The mylohyoid muscle in twenty albino rats were injected with retrogradely transported fluorescent material DAPI-Pr. Fluorescence microscopy was performed, followed by subsequent staining of these sections with the Nissl stain, thionine. Results: The fluorescent cells were found to occupy the rostro-medial part of the ipsilateral motor trigeminal nucleus. Subsequent staining of the sections with the Nissl stain thionine confirmed the rostro-medial location of the labeled cells. The entire lot of cells in this `rostro-medial subgroup` was found labeled, representing the domain area of the lower motor neurons of the mylohyoid muscle. Conclusion: The rostro-medial subgroup of the trigeminal motor nucleus is the only one to supply the mylohyoid muscle.

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