Cerebellar cortical afferents from the periaqueductal grey in the cat

A cerebellar afferent connection from the periaqueductal grey has been demonstrated in the cat by means of retrograde transport of the wheat germ agglutinin-horseradish peroxidase complex. The projection is bilateral. Its main origin is the ventrocaudal part of the periaqueductal grey, and the fibres reach different cerebellar cortical regions.