Zuccolilli G O, Mori Y
Department of Veterinary Medical Science, University of Tokyo, Japan.
J Vet Med Sci. 1995 Jun;57(3):453-7. doi: 10.1292/jvms.57.453.
This paper describes a new stereotaxic coordinate system for the goat brain based on cranial landmarks. An osseous triangle (a-b-c) formed by the point of junction of the crista galli with the caudal ventral part of the frontal sinus septum (a), the external occipital protuberance (b), and the midsagittal projection of the external acoustic meatus (c), was measured using lateral radiographs and ventriculographs and showed a constant mathematical relation. The rostral angle was 20.3 +/- 1.0 (mean +/- SD) degree in 23 goats studied regardless of their cranial size which varied considerably from one animal to another. The hypotenuse length (a-b distance) was found to be a good predictor of the rostral nuchal position of the anterior commissure (AC) and the infundibular recess of the third ventricle (INF), by which the individual variance of the stereotaxic coordinates for a given hypothalamic structure could be compensated. The anterior-posterior distances from the external acoustic meatus was highly correlated with the a-b distance for AC (r = 0.88) and INF (r = 0.90). Using these cranial landmarks and the method outlined in this paper, uncertainty in coordinate values for AC and INF in the goat brain was reduced considerably in comparison to deviation observed when the ordinary Horsley-Clarke axis (Reid's plane) was employed.
本文描述了一种基于颅骨标志的山羊脑新立体定向坐标系。使用侧位X线片和脑室造影测量了由鸡冠与额窦隔尾侧腹侧部分的交界处（a）、枕外隆凸（b）和外耳道矢状中线投影（c）形成的骨三角形（a - b - c），并显示出恒定的数学关系。在所研究的23只山羊中，无论其颅骨大小在不同动物之间差异很大，喙角均为20.3±1.0（平均值±标准差）度。发现斜边长度（a - b距离）是前连合（AC）和第三脑室漏斗隐窝（INF）喙侧项部位置的良好预测指标，通过该指标可以补偿给定下丘脑结构立体定向坐标的个体差异。从外耳道到AC（r = 0.88）和INF（r = 0.90）与a - b距离高度相关。与使用普通霍斯利 - 克拉克轴（里德平面）时观察到的偏差相比，使用这些颅骨标志和本文概述的方法，山羊脑AC和INF坐标值的不确定性显著降低。
