Suprafacial Triangle

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The suprafacial triangle is considered a surgical safe entry zone to the brainstem via the fourth ventricle.

Boundaries

The suprafacial triangle is bounded as follows[^1]:

  • Medial: Fasciculus longitudinalis medialis (MLF)

  • Caudal: Colliculus facialis

  • Lateral: Pedunculus cerebellaris superior & inferior

Figure

Schematic illustration of the suprafacial triangle
Schematic illustration of the boundaries of the suprafacial triangle. Figure adapted from Kyoshima et al. 1993.

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