• 作者： ?振源
• 作者服務機構： 國立台灣大學醫學院解剖學科
• 中文摘要： 以11隻猴（Macaca fascicularis）作高爾基氏（Golgi）法研究。猴楔狀神經核神經細胞之胞體與大小及樹突形態
  間，呈現高度異質結構。依據樹突形態之不同，神經細胞可區分為兩大類；第一類細胞，具有相當直行之樹突；第二類
  細胞之樹突則相當曲屈。
  第一類細胞，概為大型（約 28-66μm × 19-44μm），而有多角、三角或紡綞形之胞體，有約 3 至 8 根直行且長之
  主樹突。主樹突及其分枝，涵蓋一橢圓形（750-1300μm x 300-400μm），或圓形（直徑約500至900μm）之樹突
  區。第二類細胞，通常較小（約 14-55μm × 11-38μm），也有多角、三角、紡綞乃至圓形之胞體，有 2 至 5 根約 7 至
  9μm 粗之主樹突。有些主樹突之分枝可達 7 級之多，主枝及其分枝均呈曲折走向而涵蓋較小之樹突域。兩類細胞之樹
  突棘（dendritic spines）均不常見。
  兩類細胞都分佈於整個神經核內，可是神經核之中段，第二類細胞除少數在於邊緣處外，一般都集中於細胞聚集區
  “cell clusters”及“circular laminae”，而第一類細胞則大多分散在上述聚集區之周圍；而於尾段處，第二類細胞分佈於神
  經核之背部為主，第一類細胞則於腹部較多；在?段神經核內，兩類神經細胞則相互雜處。t
• 英文摘要： A total of 11 monkeys (Macaca fascicularis) was used for the Golgi study, i.e. using two variants ofthe Golgi-Kopscn method. The cuneate neurons displayed a high heterogeneity in this study. They varied in the shapes andsizes of their somata and in their dendritic morphology. They have been classified into at least two groups,based on their dendritic morphology. The first group includes the neurons with relatively straight or radiatedendrites, the iso-dendritic type; and the second group includes the neurons with relatively wavy dendrites,the allodendritic type. Group I neurons had mainly large somata (about 28-66 μm x 19-44 μm) which were polyangular,triangular or fusiform. These cells issued 3 to 8 rather thick primary dendrites which ran a long, straightdistance away from their somata and tended to be orientated in a given plane, either in the dorsoventral orin other directions. The mother and daughter dendrites of the large group I neurons covered a compara-tively large cuneate area, which was elliptical (about 750-1300 μm x 300-400 μm) or circular (about 500to 900 μm in diameter). Neurons of group Ⅱ (about 14-55 μm x 11-38 μm) were smaller than those of group Ⅰ. They alsohad polyangular, triangular, fusiform or round somata. The cells issued 2 to 5 primary dendrites of varyingdiameter from 1 to 9 μm. Some dendrites gave rise to as many as 7 generations. The dendrites ran arelatively wavy or zigzag course and covered a smaller dendritic field. The dendritic spines were not com-mon in the dendrites of both group Ⅰ and group Ⅱ neurons. Group Ⅰ and Ⅱ neurons were present at each level of the rostrocaudal extent of the cuneate nucleus.At the middle third of the cuneate nucleus, group Ⅱ neurons were concentrated mainly in the regions of'cell clusters' and 'circular laminae', although a few were also present in the ventral border region. At theselevels, group Ⅰ neurons were distributed in the periphery of the‘cell clusters' and border regions. At thecaudal third level group Ⅰ neurons were distributed more in the dorsal part of the nucleus, whereas group Ⅱneurons were more often found in the ventral part. Both groups of neurons intermingled at the rostralthird level of the nucleus.
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