[1] The red nucleus is pale pink, which is believed to be due to the presence of iron in at least two different forms: hemoglobin and ferritin.

[2] The structure is located in the midbrain tegmentum next to the substantia nigra and comprises caudal magnocellular and rostral parvocellular components.

[5] The red nucleus may play an additional role in controlling muscles of the shoulder and upper arm via projections of its magnocellular part.

Fine control of the fingers is not modified by the functioning of the red nucleus but relies on the corticospinal tract.

[9] The red nucleus has two sets of efferents:[9] 2° (Spinomesencephalic tract → Superior colliculus of Midbrain tectum)