Fig 3.

Cross-sectional MR images of the uncinate fasciculus.

A, Coronal reformatted image of the specimen shows the uncinate fasciculus (red) passing from the temporal lobe lateral to the amygdala (A), through the temporal stem (green), and into the lower segment of the extreme capsule lateral to the claustrum (arrow). Coronal Talairach coordinate = −3.

B, Axial reformatted image shows segments of the uncinate fasciculus in the inferior frontal (F) and temporal (T) lobes at the level of the sylvian fissure pedicle (arrowhead). The temporal lobe segment is passing through the temporal stem. Axial Talairach coordinate = −9.

C, Oblique (+17°) axial reformatted image superior to the sylvian fissure pedicle shows the uncinate fasciculus passing from the temporal lobe through the temporal stem and into the lower region of the frontal lobe. This image is at the level of the inferior edge of the claustrum (thin arrow), putamen (P), head of the caudate nucleus (C), and anterior commissure (thick arrow). The oblique axial plane was generated at +17° to the bicommissural plane and used to better demonstrate the relationship of the dissected tracts to the anterior commissure. This oblique axial image is not in Talairach coordinates.

D, Axial image shows the most superior level at which the uncinate fasciculus (red) is present in the extreme capsule lateral to the claustrum (arrow). At its most superior level, the uncinate fasciculus is below the level of the frontal horns of the lateral ventricles. Axial Talairach coordinate = −1.