Tragion

Japanese: Tragion

…When the human head and face are viewed from the side, this is the angle that indicates the inclination of the facial contour. The angle is calculated by the intersection of the contour with the auricular plane (the plane determined by the upper edge of the external auditory canal on both sides, Porion, and in living organisms, the upper edge of the ear cartilage, Tragion, and the lowest point of the left orbital entrance, Orbitale). The angle that the straight line connecting the boundary point between the frontal bone and the nasal bone, Nasion, and the most anterior point of the upper alveolus, Prosthion, makes with the auricular plane is called the total lateral angle. …

From [Anthropometry]

…Height is the vertical distance from the floor to the highest point (vertex) of the median plane of the head. From the floor, the following are measured using a height chart: tragus height (to the tragion at the upper edge of the tragus), sternum height, pubic symphysis height, acromion height (to the outermost edge of the acromion of the scapula), middle finger tip height (to the tip of the middle finger when the arm is naturally hanging down), anterior iliac spine height (to the anterior superior iliac spine of the hipbone), etc. From these measurements, the upper limb length (acromion height - middle finger tip height) and trunk length (sternum upper edge height - anterior iliac spine height) are calculated. …

*Some of the terminology explanations that mention "Tragion" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…ヒトの頭顔部を側面からみて，顔面の輪郭の傾きを示す角度である。輪郭が耳眼平面(左右の外耳孔上縁点Porion，生体では耳軟骨の上縁Tragionと左側の眼窩入口の最低点Orbitaleによって決定される面)と交差してなす角を求める。この時に前頭骨と鼻骨の境界点Nasionと上側歯槽の最前点Prosthionとを結ぶ直線が耳眼平面となす角を全側面角という。…

【人体測定法】より

…身長は床面より頭部正中面の最高点(ベルテックスVertex)までの垂直距離である。床面からは耳珠高(耳珠上縁のトラギオンTragionまで)，胸骨上縁高，恥骨結合上縁高，肩峰高(肩甲骨の肩峰の最外側縁の点まで)，中指端高(手腕を自然に下垂した時の中指端まで)，前腸骨棘高(寛骨の上前腸骨棘まで)等を身長計を用いて計測する。これらの計測値から上肢長(肩峰高－中指端高)，軀幹長(胸骨上縁高－前腸骨棘高)を求める。…

※「Tragion」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典第２版について | 情報

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