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Afferents to the trigeminal and facial motor nuclei in pigeon ( Columba livia L.): Central connections of jaw motoneurons
Author(s) -
Berkhoudt Herman,
Klein Bradley G.,
Zeigler H. Philip
Publication year - 1982
Publication title -
journal of comparative neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.855
H-Index - 209
eISSN - 1096-9861
pISSN - 0021-9967
DOI - 10.1002/cne.902090308
Subject(s) - anatomy , reticular formation , neuroscience , microstimulation , pons , biology , spinal trigeminal nucleus , trigeminal nerve , facial muscles , medulla oblongata , sensory system , nucleus , central nervous system , stimulation , nociception , biochemistry , receptor
Trigeminal and facial motor nuclei innervating the pigeon's jaw muscles were identified using a combination of microstimulation and EMG recording and HRP injections were made iontophoretically. The trigeminal motor nucleus receives an ipsilateral projection from sensory neurons in the trigeminal mesencephalic nucleus which forms the afferent limb of the monosynaptic stretch reflex of the jaw‐closers. Both the trigeminal and facial motor nuclei receive bilateral projections from interneurons in the intertrigeminal area and the lateral (parvocellular) reticular formation of the pons and medulla. These neurons serve as premotor elements in the control of jaw movements, mediating ascending, descending and internuclear connections. The similarity of inputs to the trigeminal and facial nuclei may reflect their common function as jaw motoneurons in this species.