Wilbrand Knee Revisited.

ABSTRACT:

Background

Over a century ago, German ophthalmologist Hermann Wilbrand reported inferonasal crossing fibers within the chiasm curve anteriorly into the contralateral optic nerve. This anatomic bend, "Wilbrand knee," is classically cited as the explanation for the "junctional scotoma," a contralateral superotemporal visual field defect associated with lesions affecting the optic nerve at its junction with the chiasm. More recent reports have called into question the existence of Wilbrand knee or suggested that it may simply be an artifact.

Methods

Four human optic chiasms (obtained from cadaver donors with no reported premortem visual pathology) and 2 monkey chiasms were fixed and thin sectioned (40 µm), then examined using anisotropic scattering imaging, a novel technique th

SUBMITTER: Shin RK 

PROVIDER: S-EPMC11567669 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature