A histological atlas of the macaque (Macaca, mulatta) substantia nigra in ventricular coordinates

摘要: An atlas of the macaque substantia nigra was established in ventricular coordinates. Having verified that nigral contours are stable both Macaca mulatta and speciosa, antero-posterior sequence four subdivisions described on eight vertico-transverse levels after a comparison between histological histochemical data. The pars reticulata constitutes anterior pole containing pale, small cell-bodies scattered among numerous endings striato-pallido-nigral fibres. Anteriorly, compacta forms dorsal border nigra, but more posteriorly, it leaves develops ventral fringes. Its large cell-bodies, most often pigmented, rich Nissl bodies acetylcholinesterase, closely spaced few axonal fascicles. lateralis contains low density corresponds to hilum entrance fibres gives rise nigro-tectal projection. mixta, dorsally located, neurons varying considerably size. It represents exit axons which project various targets.