Winer J A
J Comp Neurol. 1985 Aug 1;238(1):10-37. doi: 10.1002/cne.902380103.
The cytoarchitecture, myeloarchitecture, neuronal architecture, and intrinsic and laminar organization of layer II were studied in the primary auditory cortex (AI) of adult cats. The chief goal was to describe the different types of cells and axons to provide a framework for experimental studies of corticocortical connections or of neurons accumulating putative neurotransmitters. A further goal was to differentiate layer II from layer III. Layer II extends from 150-200 micron to about 400 micron beneath the pia and has two subparts. The superficial stratum, layer IIa, has many small, chiefly non-pyramidal neurons, primarily with round or oval perikarya, and a sparse, fine, and irregularly arranged axonal plexus. Layer IIb somata are larger and more densely packed and there is a more developed vertical and lateral axonal plexus. The border with layer III was marked by numerous large pyramidal cells with a thicker apical dendrite with more developed basal dendritic arbors than those of layer II pyramidal cells. Eight varieties of neurons were recognized in Golgi-impregnated material. These included small and medium-sized pyramidal cells, whose apical dendrites often ramified in layer I; bipolar and bitufted cells with polarized, sparse dendritic arbors; small smooth or sparsely spinous multipolar cells with radiating dendrites and small dendritic fields; spinous multipolar cells, whose large dendritic fields had more extensive apical than basal arbors; large sparsely spinous multipolar cells with smooth, robust apical dendrites; tufted multipolar cells with highly developed apical dendrites and some dendritic appendages; and extraverted multipolar cells with a broad, candelabra-shaped dendritic configuration, and with most dendrites oriented at right angles to the pia. The axons of the different cell types had the following general dispositions: those arising from the pyramidal cells could often be traced into the white matter but had many local branches as well; those of the other neurons had more or less extensive local axonal collateral systems and fewer branches which appeared to be corticofugal. However, the complete trajectory of the axons was not always impregnated in the adult material.(ABSTRACT TRUNCATED AT 400 WORDS)
对成年猫初级听觉皮层（AI）的细胞结构、髓质结构、神经元结构以及II层的内在和分层组织进行了研究。主要目标是描述不同类型的细胞和轴突，为皮层间连接或积累假定神经递质的神经元的实验研究提供一个框架。另一个目标是区分II层和III层。II层从软膜下150 - 200微米延伸至约400微米，有两个亚层。浅表层，即IIa层，有许多小的、主要是非锥体神经元，其胞体主要呈圆形或椭圆形，还有稀疏、纤细且排列不规则的轴突丛。IIb层的胞体更大且排列更密集，有更发达的垂直和横向轴突丛。与III层的边界以众多大型锥体细胞为标志，这些细胞的顶树突更粗，其基底树突分支比II层锥体细胞的更发达。在高尔基染色材料中识别出了八种神经元。其中包括中小型锥体细胞，其顶树突常在I层分支；双极和双簇状细胞，具有极化、稀疏的树突分支；小的光滑或稀疏棘状多极细胞，有放射状树突和小的树突野；棘状多极细胞，其大的树突野顶树突分支比基底树突分支更广泛；大的稀疏棘状多极细胞，有光滑、粗壮的顶树突；簇状多极细胞，具有高度发达的顶树突和一些树突附属物；外向型多极细胞，具有宽阔的、烛台状的树突结构，且大多数树突与软膜成直角排列。不同类型细胞的轴突有以下一般走向：来自锥体细胞的轴突通常可追踪到白质，但也有许多局部分支；其他神经元的轴突有或多或少广泛的局部轴突侧支系统，且分支较少，这些分支似乎是离皮层的。然而，在成年材料中轴突的完整轨迹并不总是被染色。（摘要截断于400字）
