Functional Organization of the Human Gustatory Cortex
スポンサーリンク
概要
- 論文の詳細を見る
Neurological studies in patients with stroke or epilepsy have suggested that the human primary gustatory cortex is located in the insula and frontal operculum. Although electrophysiological studies in non-human primates have supported the above idea, these conventional approaches were inapplicable to systematically examine the human gustatory cortex. Recent non-invasive brain imaging techniques including positron emission tomography (PET) and functional magnetic resonance imaging (fMRI) have enabled us to explore the precise locations of gustation-related regions in the human brain. These non-invasive imaging studies have revealed the mechanism of not only "bottom-up" information processing, from the peripheral gustatory organs, taste buds, to the gustatory cortices, but also "top-down" processing in the gustatory system. Our group investigated the organization of neural systems for gustatory perception and gustatory imagery using fMRI. We found that gustatory imagery tasks activate the insula, showing predominant activation in the left hemisphere. Furthermore, gustatory imagery tasks activated the orbitofrontal, precentral, and middle/superior frontal gyri. On the other hand, gustatory imagery contrasted with visual imagery activated only the insula, orbitofrontal and precentral gyri. These results suggest the possibility that the source of "top-down" signals may be in the middle and superior frontal gyri, and that these signals may affect on neural activities in the insula, orbitofrontal, and precentral gyri.
- 歯科基礎医学会の論文
歯科基礎医学会 | 論文
- 口腔レンサ球菌のベータディフェンシン感受性の多様性とその機構の解析
- ココアによる歯周病関連菌に対する抗菌効果
- Candida albicansに対するDefensinの抗菌活性の検討
- 唾液腺腺様嚢胞癌の偽嚢胞腔内の免疫グロブリン
- 破骨細胞が産生するcathepsin KとMMP-9の局在について : 肺癌骨転移モデルを用いた検討