Journal of Oral Medicine and Pain

Korean Academy of Orofacial Pain and Oral Medicine (대한안면통증구강내과학회)
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The Relationship of Two-Point Discrimination Threshold and the Number of Fungiform Papilla According to Anatomical Location of Tongue

해부학적 위치에 따른 혀의 촉각식별능의 차이와 심상유두 개수의 관계

  • Kim, Kyun-Yo (Department of Oral Medicine, School of Dentistry, Kyungpook National University) ;
  • Hur, Yun-Kyung (Department of Oral Medicine, School of Dentistry, Kyungpook National University) ;
  • Choi, Jae-Kap (Department of Oral Medicine, School of Dentistry, Kyungpook National University)
  • 김균요 (경북대학교 치의학전문대학원 구강내과학교실) ;
  • 허윤경 (경북대학교 치의학전문대학원 구강내과학교실) ;
  • 최재갑 (경북대학교 치의학전문대학원 구강내과학교실)
  • Published : 2008.12.30
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Abstract

The lingual branch of the trigeminal nerve transmitts general sensation from anterior two thirds of the tongue, also bearing within sheath fibers of chordal tympani branch of the facial nerve. Chorda tympani nerve carries special taste sensations from the anterior two thirds of the tongue and sub-serves the existing trigeminal pathway. Chorda tympani nerve and the lingual nerve innervate to fungiform papilla and distribution of fungiform papilla on tongue dorsum is variable according to anatomical location. The purpose of this report is to assess that the relationship of the number of fungiform papilla and the ability of two-point discrimination of tongu dorsum. Twenty-six healthy students(male:female=13:13) whose mean age was $30{\pm}3$ participated in our study. Two-point discrimination thresholds were measured to evaluate the spatial acuity of touch sensation. The measurement was carried out at the tip and posterolateral region of dorsal tongue. After two-point discrimination test, we took the pictures of their dorsal tongue dyed with methylene blue with digital camera. There were no significant differences between the number of fungiform papilla and the two-point discrimination threshold. But, we found that there were the intraregional and intersubject variations of spatial acuity of the tongue. During the test on the posterolateral region of the dorsal tongue, students appealed the difficulty of discrimination of one point and two point.

목적: 혀의 해부학적 위치에 따른 촉각식별능의 차이를 조사하고 이것과 심상유두의 개수 사이에 관련성이 있는지의 여부를 확인하기 위해서 본 연구를 시행하였다. 방법: 현재 복용 중인 약물이 없고, 과거 장기간 약물을 복용한 경험이 없었으며, 전신질환이 없는 건강한 남녀 13명(평균 연령 $30{\pm}3$세)을 대상으로 혀의 수초성 $A{\delta}$ 섬유와 무수초성 C 섬유와 관련한 촉각식별능을 알아보기 위해서 Castroviezo $caliper^{(R)}$를 이용한 두점식별검사를 실시하였다. 심상유두의 개수는 methylene blue로 혀를 염색해서 심상유두를 확인하여 개수를 세었다. 결과: 1. 혀의 전방부와 후측방부위의 심상유두개수를 세어 본 결과, 남자는 전방과 후측방이 각각$51.69{\pm}14.15$개, $12.92{\pm}6.13$개였으며, 여자는 $58.85{\pm}13.56$개, $16.23{\pm}6.38$개였다. 남녀 모두 후측방에 비해 전방부에서 유두의 개수가 3배 이상 많은 것을 관찰할 수가 있다. 2. 두 점으로 식별해내는 최소한의 거리는 전방에서 평균 $1.91{\pm}0.74mm$였으며, 성별에 따라 나눠 다시 분류했을 때, 남자의 인식 역치가 높은 것으로 관찰되었으나, 성별에 따른 통계적 유의성은 나타나지 않았다. 3. 두점식별거리를 기준으로 네 개의 그룹으로 나누었을 때, 거리가 증가할수록 심상유두의 개수가 감소하는 경향을 보였다. 그러나, 두점인지역치와 심상유두의 개수 간에 통계적 유의성은 없었다.

Keywords

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