L sign (brain)

Last revised by Bahman Rasuli on 26 Feb 2021

The L sign is one of the features useful in identifying the central sulcus on cross-sectional imaging.

On axial images, the superior frontal gyrus at its posterior aspect meets the precentral gyrus in an "L" configuration (forwards on the left, backward on the right). The central sulcus is the next posterior sulcus 1.

See also

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