近赤外線分光法の咬筋への応用

抄録

The masseter muscle circulation and oxygen metabolism during clenching and mastication were evaluated non-invasively in 3 male adult subjects using near-infrared spectrophotometry.
During clenching, oxygenated hemoglobin (oxy-Hb) decreased, while deoxygenated hemoglobin (deoxy-Hb) increased in all subjects. These changes may reflect increased oxygen extraction in them asseter muscle. On the other hand, during gumi-mastication, both the oxy-Hb and the total-Hb (oxy-Hb + deoxy-Hb, which indicates the blood volume in the muscle) increased, while deoxy-Hb decreased in all subjects. These changes may reflect an increase in the arterialblood flow to the muscle, and may also reflect an increase in the venous return from the muscle during mastication .
These results suggest that the possible use of the near-infrared spectrophotometry for the noninvasive measurement of the masticatory muscle circulation and oxygen metabolism.