THE SPINO-BRAINSTEM PROJECTIONS IN THE CAT. AN ANTEROGRADE HRP STUDY
- VernacularTitle:猫脊髓脑干投射.HRP顺行法研究
- Author:
Gong JU
- Publication Type:Journal Article
- From:
Acta Anatomica Sinica
1957;0(04):-
- CountryChina
- Language:Chinese
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Abstract:
HRP was injected into the cervical or lumbar spinal cord in 8 cats and the spinobrainstem projections were traced with the anterograde HRP technique. The labeled terminal branches were found most densely concentrated in the ipsilateral dorsal column nuclei and lateral reticular nucleus, the contralateral medial and dorsal accessory olivary nuclei and the bilateral pontobulbar bodies and dorsolateral part of pontine nuclei. In the reticular formation and a number of brainstem nuclei labeled terminals were also found to varying degrees. The most remote site found labeled was the hypothalamus.It was also found that the dorsal accessory olivary nucleus could be further subdivided into a caudal and an oral part, cells in the caudal part being smaller than that in the oral one.In the accessory olivary nuclei labeled terminal branches were more numerous in lumbar injection cases. Clearcut somatotopical localization was demonstrated in the oral part of the dorsal accessory olivary nucleus.In the lateral reticular nucleus the subnucleus magonocellularis and the lateral wing of the subnucleus parvocellularis were the major sites of labeling and the labeling in cervical injection cases greatly out numbered that in lumbar injections.The cervical and lumbar injections were equal in their amount of projection to the pontobulbar bodies and the dorso-lateral part of the pontine nuclei.The distribution of spinal afferents in the inferior olivary nucleus, the lateral reticular nucleus, the pontobulbar body and the pontine nucleus was discussed.
