Nakahara H, Nakasato N, Kanno A, Murayama S, Hatanaka K, Itoh H, Yoshimoto T
Dental Division, Miyagi National Hospital, Miyagi, Japan.
J Dent Res. 2004 Apr;83(4):307-11. doi: 10.1177/154405910408300407.
To localize the oral primary somatosensory cortex, we measured somatosensory-evoked fields for the lip, gingiva, and tongue in six healthy subjects. The latency of the first peak of the posterior-oriented current in the contralateral hemisphere was 50.9 +/- 8.3 ms for the gingiva, significantly shorter than those for the lip and tongue peaks. The equivalent current dipole was localized on the central sulcus. The gingival dipole was localized significantly inferior to the lip dipole but not different from the tongue dipole. The moment of the gingival dipole was significantly smaller than that of the lip dipole but not different from that of the tongue dipole. Differences in the above parameters were negligible between the left and right, anterior and posterior, and upper and lower locations within the same organ, except that the dipole location for the anterior upper tongue was significantly inferior to that for the lower tongue.
为了定位口腔初级体感皮层，我们在6名健康受试者中测量了嘴唇、牙龈和舌头的体感诱发电场。对侧半球向后定向电流第一个峰值的潜伏期，牙龈为50.9±8.3毫秒，明显短于嘴唇和舌头峰值的潜伏期。等效电流偶极子定位于中央沟。牙龈偶极子的定位明显低于嘴唇偶极子，但与舌头偶极子无差异。牙龈偶极子的矩明显小于嘴唇偶极子，但与舌头偶极子无差异。除了上舌前部的偶极子位置明显低于下舌的偶极子位置外，同一器官内左右、前后以及上下位置之间上述参数的差异可忽略不计。
