Three‐dimensional structure of the mammalian suprachiasmatic nuclei: A comparative study of five species

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Abstract
The suprachiasmatic nuclei from five mammalian species (rat, hamster, cat, rhesus, and squirrel monkey) were reconstructed in three‐dimensions by use of computer graphics and conventional histological techniques. The gross nuclear structures of the suprachiasmatic nuclei have complex threedimensional geometries in every plane of orientation, and between the five species there are marked differences in the three‐dimensional morphology of the suprachiasmatic nuclei. These dimensionally accurate reconstructions are discussed in relation to previous data suggesting morphological and/or functional specialization within specific regions of the suprachiasmatic nuclei.