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  • Title: Sexual dimorphism in the trigeminal motor neurons innervating the mouse masseter muscle.
    Author: Maeda N, Sugiyama H, Suemune S, Wakisaka H, Niida S, Ogata K, Miyata K.
    Journal: Brain Res; 1993 Nov 05; 627(1):177-80. PubMed ID: 8293300.
    Abstract:
    The extrafusal and intrafusal muscle fibers in the masseter muscle are innervated by motoneurons in the trigeminal motor nucleus (Mo 5). In the present study, we found that the number of trigeminal motor neurons in the male mouse was significantly larger than that in the female. However, we could not detect any significant difference between male and female mice in the number of sensory neurons in the trigeminal mesencephalic nucleus (Me 5). This is the first report on sexual dimorphism in masticatory motoneurons of mammals.
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