Kölliker-Fuse's core, one on hay. and one on the left. side, the rostral of the pons is located between the inner parabrachial nucleus and cell group A5 (norepinephrine).
The nucleus of Kölliker-Fuse, together with nerve cells of the inner parabrachial nucleus, forms the pneumotactic center of the brainstem, interrupting the inhalation phase and enabling the exhalation phase during the ventilation cycle. The area counts as a pattern generator.