Trigeminal substrates of intracranial self-stimulation in the brainstem

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Science  22 Apr 1977:
Vol. 196, Issue 4288, pp. 447-449
DOI: 10.1126/science.850789


Intracranial self-stimulation was elicited by electrodes located in the trigeminal motor nucleus of the rat. Rebound jaw movements were also elicited at postiive self-stimulation placements, but control experiments revealed that the lever pressing was not a motor artifact. It is suggested the modulation of trigeminal motoneurons may serve as an important reinforcement mechanism in the brainstem.