The superior longitudinal fasciculus (SLF) is an association tract in the brain that is composed of three separate components.

[1][2] It is present in both hemispheres and can be found lateral to the centrum semiovale and connects the frontal, occipital, parietal, and temporal lobes.

SLF II connects to the caudal inferior parietal cortex which controls spatial attention and visual and oculomotor functions.

Some research suggests a larger SLE II volumes in the "right hemisphere corresponded to faster detection times in the left hemifield".

SLF III connects the rostral inferior parietal cortex which receives information from the ventral precentral gyrus.