Abstract

This chapter discusses the results of the investigation of the uncinate fasciculus of rhesus monkey brains. It shows that the UF is a bidirectional pathway that preferentially links the anterior temporal lobe with the medial and orbital prefrontal cortex. Fibers from the rostral part of the superior temporal gyrus and the inferotemporal region ascend in the temporal stem, where they are positioned rostral to the most anteriorly situated fibers of the inferior longitudinal fasciculus. The uncinate fibers then aggregate lateral to the ventral part of the claustrum, situated medial to the insular cortex, and below and medial to the fibers of the extreme capsule. They then move medially through the limen insula into the white matter of the orbital cortex.