Abstract
The termination in the dorsal mesencephalon of fibres from the lateral cervical nucleus (LCN), recently discovered with the retrograde tracing technique, was investigated by both the degeneration method and anterograde transport of lectin-conjugated horseradish peroxidase. Both strategies gave similar results. The termination area was found to be situated at the level of transition between the superior and inferior colliculi and comprises mainly the intercollicular nucleus and the deep and intermediate layers of the posterolateral pole of the superior colliculus. The functional implication of the demonstrated projection from LCN is discussed in relation to somatosensory activity in the mesencephalic tectum.
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