Triangle of Guillain and Mollaret
The triangle of Guillain and Mollaret, also known as dentatorubro-olivary pathway, has three corners 1:
Connecting fibres are only identified between the red nucleus and inferior olivary nucleus (central tegmental tract) and between the red nucleus and the to the contralateral dentate nucleus via the superior cerebellar peduncle (rubrodentate fibers) 1.
No connecting tract is present between the inferior olivary nucleus and contralateral dentate nucleus 1.
Depending on the location of interruption, cerebellar atrophy or hypertrophic olivary degeneration can ensue.