BRAIN and NERVE Shinkei Kenkyu no Shinpo Volume 67, Issue 2 (February 2015)

  • Abstract
  • Look Inside
  • Reference


Comminution of food by mastication contributes to an increase in the efficiency of energy intake from food, which supports the high metabolic rate of mammals. The central pattern-generating circuit for mastication produces motor commands for mastication by using sensory information from periodontal mechanoreceptors and muscle spindles in the jaw-closing muscles. The motor commands that are glutamatergic, glycinergic, and GABAergic are transmitted to motoneurons for the jaw, tongue, etc., through premotor neurons that are located in the supratrigeminal region, reticular formation dorsal to the facial nucleus, etc. Our previous studies of N-methyl-D-aspartate-induced fictive suckling using isolated brainstem-spinal cord preparations obtained from neonatal mice revealed that the neuronal network that contributes to the synchronized activity of the jaw and tongue muscles is located in both the right and left sides. The network of either side sends its command to the trigeminal motoneurons mainly via the commissural pathway, while the command is sent to the hypoglossal motoneurons on the same side.

Copyright © 2015, Igaku-Shoin Ltd. All rights reserved.


BRAIN and NERVE-神経研究の進歩
67巻2号 (2015年2月)
電子版ISSN 1344-8129 印刷版ISSN 1881-6096 医学書院