Scattered catecholaminergic cells in the dorsolateral tegmentum caudal to locus coeruleus in cat.

In the cat brain stem, extending from the caudal locus coeruleus, scattered catecholaminergic (CA) cells are distributed over a large area. This includes a periventricular region dorsolateral to the fourth ventricle corresponding to the A4 group, the white matter separating vestibular and intracerebellar nuclei, and lateral to the vestibular complex in relation to the restiform body. In all, these CA cells were found to number 122 +/- 54 (mean +/- S.D.), unilaterally.