Determination of human brain area activated following olfactory stimulation using near-infraied

最近，近红外光谱（NIRS）已被用于测量大脑皮层的激活。在嗅觉或三叉神经刺激的条件下，通过光学地形系统（ETG-4000，Hitachi Medical Corporation，Tokyo）测量氧合和脱氧血红蛋白浓度的变化。气味刺激使大脑额叶的氧合血红蛋白水平有升高的趋势，而刺激三叉神经则使颞顶叶的氧合血红蛋白水平升高。然而，受试者之间存在一些差异。

Recently, near-infrared spectroscopy (NIRS) has been used to measure activation of brain cortex. Change of both oxygenated and deoxiganated haemoglobin concentration were measured by optical topography systems (ETG-4000, Hitachi Medical Corporation, Tokyo) under the condition of olfactory or trigeminal stimulations. Although, the oxihemoglobin level with the frontal area of cerebrum accepted a tendency to be elevated by odor stimulation, but oxihemoglobin level from temporal to parietal area was elevated by trigeminal stimulation. However, there were some differences among the subjects.