THE MEDIAL FOREBRAIN-BUNDLE OF THE RAT .1. GENERAL INTRODUCTION
THE MEDIAL FOREBRAIN-BUNDLE OF THE RAT .1. GENERAL INTRODUCTION
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DOI:
10.1002/cne.902060106
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发表时间:
1982-01-01
影响因子:
2.5
通讯作者:
VEENING, JG
中科院分区:
文献类型:
--
作者:
NIEUWENHUYS, R;GEERAEDTS, LMG;VEENING, JG
This paper is the first of a projected series of studies on the structure and composition of the medial forebrain bundle (MFB) of the rat and the relations of this fiber system to its bed nucleus, the lateral hypothalamic area. The first part of the paper comprises an extensive review of literature on the MFB from its discovery by Ganser in 1882 to the present. This review serves as the basis for an evaluation of our present-day knowledge of the organization of the MFB, which is presented in the second part of this paper. Despite the wealth of information available on the origins and sites of termination of the axons that constitute the MFB, surprisingly little attention has been given to the bundle itself, to its topographic boundaries, its fiber composition, or to the spatial arrangement of its constituent components. These features of the MFB as it extends through the lateral preoptic and lateral hypothalamic areas have been analyzed in normal Kluver-Barrera-and Bodian-stained material. From this analysis, a detailed atlas of the MFB and some of the surrounding structures has been prepared. This atlas, which forms the third section of this paper, illustrates the appearance and organization of the MFB at ten equidistant levels through the lateral preoptic and lateral hypothalamic continuum.The fasciculus medialis telencephali or medial forebrain bundle (MFB) is an important fiber system in the forebrain of all groups of vertebrates. In mammals it represents the central longitudinal pathway of the limbic forebrain-midbrain continuum. Extending from the tuberculum olfactorium rostrally to the ventromedial part of the tegmentum mesencephali caudally, this mostly thin-fibered bundle is most clearly defined as it traverses the lateral preoptic and lateral hypothalamic areas. Although a wealth of information is available on the various origins and sites of termination of the axons that constitute the MFB, careful review of the literature reveals that relatively little attention has been paid to the organization of the bundle itself, to its boundaries, to its fiber composition, or to the spatial arrangement of its constituent components. The present paper is the first of a series of studies on the structure and composition of the MFB in the rat. In the first section the pertinent literature will be reviewed; in the second section current knowledge of the bundle is evaluated; and in the final section the main trajectory of the MFB, ie, the part extending through the lateral preopticohypothalamic continuum, will be described. This description is based on normal Kluver-Barrera-and Bodian-stained material. The accompanying illustrations together constitute an atlas, which will serve as the basis for the later studies.