Superior geniculocalcarine tract

The superior optic radiation or superior geniculocalcarine tract, also known by its eponymous name Baum’s loop, is the posterior/superior fibres of the optic radiation. These superior fibres pass dorsally and posteriorly from the lateral geniculate nucleus through the retrolentiform internal capsule and parietal lobe to the superior margin of the calcarine sulcus (lingual gyrus, occipital lobe). This region forms part of the primary visual cortex.

Related pathology

Damage of this pathway on the left can result in a homonymous lower right visual field quadrantanopia, a.k.a. "pie-in-the-floor defect".

Share article

Article information

rID: 53054
Section: Anatomy
Tags: cases, snippet
Synonyms or Alternate Spellings:
  • Superior optic radiation
  • Baum's loop

Support Radiopaedia and see fewer ads

Updating… Please wait.
Loadinganimation

Alert accept

Error Unable to process the form. Check for errors and try again.

Alert accept Thank you for updating your details.