Velayos J L, Ojeda P, Picó J M
Departamento de Morfología, Facultad de Medicina, UAM, Madrid, España.
Rev Esp Fisiol. 1989;45 Suppl:151-60.
In order to study the HRP retrograde axonal transport, injections of horseradish peroxidase (HRP) were made in the centromedian and parafascicular nuclei of the cat. The centromedian nucleus receives more cortical projections than the parafascicular nucleus. After centromedian and parafascicular nuclei injections, retrograde labeling was more abundant in the ventral bank of the cruciate sulcus than in its dorsal bank. Area 4 projects preferentially to the centromedian nucleus. These projections arise mainly in sector gamma of area 4. Projections from area 6 a beta to the centromedian and parafascicular nuclei are slightly more numerous than those arising in 6 a alpha. Projections from the sectors of motor and premotor areas located in the depth of the cruciate sulcus are scanty. These projections, however, are mainly directed to the centromedian nucleus and the lateral portions of the parafascicular nucleus. Cortical neurons projecting to centromedian and parafascicular nuclei are mainly situated in the superficial and intermediate sublayers of layer V. Only scarce projections arise from neurons located in layer VI.
为了研究辣根过氧化物酶（HRP）逆行轴突运输，将辣根过氧化物酶注射到猫的中央中核和束旁核。中央中核比束旁核接受更多的皮质投射。在中央中核和束旁核注射后，十字沟腹侧缘的逆行标记比背侧缘更丰富。4区优先投射到中央中核。这些投射主要起源于4区的γ扇形区。从6aβ区到中央中核和束旁核的投射比6aα区的投射略多。位于十字沟深处的运动区和运动前区各扇形区的投射很少。然而，这些投射主要指向中央中核和束旁核的外侧部分。投射到中央中核和束旁核的皮质神经元主要位于V层的浅部和中部亚层。只有位于VI层的神经元产生稀少的投射。
