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Voluntary Movements

開催日 2014/9/11
時間 11:00 - 12:00
会場 Poster / Exhibition(Event Hall B)

Architecture of whisker movement related neurons in rat primary motor cortex

  • P1-157
  • 柴田 憲一 / Ken-ichi Shibata:1 古田 貴寛 / Takahiro Furuta:1 平井 大地 / Daichi Hirai:1 金子 武嗣 / Takeshi Kaneko:1 
  • 1:京都大院医高次脳形態 / Dept Morphol Brain Sci, Grad Sch of Med, Kyoto Univ, Koyto, Japan 

The purposeful movement of biological sensors, such as the motion of the eyes or hands, is an essential part of perception. We don't know what algorithms incorporate movement as part of perception at the level of cortex. Rats move their whiskers to locate and identify objects in their environment. The whiskers provide important tactile information to rats, and therefore have an extended representation in somatosensory and motor cortex. Vibrissa area in primary motor cortex (vM1) controls whisking movements directly via Facial Nucleus (FN) and indirectly via the whisking central pattern generator (CPG) in the brainstem and so on. The facial motor neurons drive the muscles involved in whisking movement. However, what kinds of information from vM1 are sent and where they are sent have not been understood completely. To characterize the motor cortex representation of whisking movements, here we recorded single neuronal activity of vM1 in head-fixed rats performing a behavioral task with juxtacellulary recording method. After recording, we labeled the recorded neuron by injecting plasmid encoding palmitoylation green fluorescent protein (pal-GFP). We reconstructed and quantitatively analyzed the differences of dendrites and axonal arborization of single vM1 neurons among their firing properties related to whisking movements.

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