The central cervical nucleus - A source of spinocerebellar fibres, demonstrated by retrograde transport of horseradish peroxidase.
Injections of horseradish peroxidase in the cerebellum of kittens resulted in labelling of cells in the central cervical nucleus (CCN) in the upper cervical spinal cord. The largest number of labelled CCN neurones was found after injections including the anterior part of the anterior lobe of the cerebellum. In this neuronal system horseradish peroxidase was transported at a maximal velocity of about 150 mm/day.
Wiksten
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Department of Anatomy, Karolinska Institutet, 104 01 Stockholm 60, Sweden.