In the medulla oblongata, the<unk> is a group of neurons located on the anterior surface of the medullary pyramids. These nuclei are the extension of the pontine nuclei. They receive fibers from the corticospinal tract and send their axons through the anterior external<unk>  fibers and medullary striae to the cerebellum via the inferior cerebellar peduncle.<unk>  nuclei are capable of chemosensitivity and have a proven role in the respiratory center controlling the breathing rate.
Arcuate nucleus 
Reticulotegmental nucleus
Lentiform nucleus
Periventricular nucleus
Gigantocellular reticular nucleus
Medial pulvinar nucleus
Inferior colliculus
Paramedian reticular nucleus