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Influence of Human Jaw Movement on Cerebral Blood Flow

Y. Hasegawa, T. Ono*, K. Hori, and T. Nokubi

Division of Oromaxillofacial Regeneration, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita City, Osaka, 565-0871, Japan


Figure 1
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  		Figure 1. Simultaneous recording system of bilateral middle cerebral artery blood flow velocities, heart rate, transcutaneous partial pressure of arterial carbon dioxide, and bilateral electromyography of the masseter muscles (A). Magnetic resonance angiographic images in the coronal section (left) and frontal section (right) show the three-dimensional relationship between the probes (P) and the middle cerebral blood artery (arrows) (B).

 

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  		Figure 2. Analysis of area under effect curve (AUEC), maximum values (Emax), and time of maximum values (Tmax) for pre-task, on-task, and post-task periods. The area surrounding the wave of the experimental and baseline data (set by the median in the pre-task period) was calculated as AUEC in the on-task and post-task periods. In this Fig., AUEC in the post-task period was calculated as the difference in area between data above and below the baseline.

 

Figure 3
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  		Figure 3. A representative recording of left and right middle cerebral artery blood flow velocities (MCAVs), heart rates, left and right EMG activities (EMGs), and transcutaneous partial pressures of arterial carbon dioxide (PaCO2) in which baseline (median in pre-task period) data are shown as a dashed line.

 




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