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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
REVIEW
Anatomy of the human hypothalamus (chiasmatic and tuberal region).
The hypothalamus sensu stricto consists of the chiasmatic, the tuberal and the mamillary region. The present study is confined to the poorly myelinated chiasmatic and tuberal region. Both regions harbor many nuclear grays with relatively clear-cut boundaries embedded in an ill-defined nerve cell assembly referred to as the hypothalamic gray. Prominent components of the chiasmatic region are the magnocellular neurosecretory complex (supraoptic nucleus, paraventricular nucleus, accessory neurosecretory nucleus), the sexually dimorphic intermediate nucleus, the suprachiasmatic and retrochiasmatic nuclei. The dominating structure of the tuberal region is the complex of the ventromedial, posteromedial and dorsomedial nuclei supplemented by the periventricular and infundibular nuclei. Lateral portions of the tuber cinereum harbor the lateral tuberal nucleus and the tuberomamillary nucleus. The lateral tuberal nucleus exhibits pronounced cell loss in Huntington's chorea and is also severely involved in cases of dementia with argyrophilic grains. The large nerve cells of the tuberomamillary nucleus show particularly severe affection in both Alzheimer's (intraneuronal neurofibrillary changes) and Parkinson's disease (Lewy bodies).
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