- The AITA is demonstrated using our 3D virtual model in the lateral (A), superior (B), and oblique posterolateral (C) views, highlighting the thalamic surface immediately exposed.
- D: Anterosuperior view of a cadaveric white matter dissection showing the relevant surrounding structures.
- E and F: Photographs demonstrating the U-shaped incision made in a cadaver to cross the midline and expose sufficient space anterior to the coronal suture. In real-life surgery, a slightly curved coronal incision behind the hairline usually offers good exposure.
- G and H: Anatomical dissection showing exposure of a right lateral ventricle after a callosotomy (G) and choroidal fissure dissection (H), with identification of the relevant anatomical structures. I: Anatomical dissection showing the superior view of the right lateral ventricle. The green dashed line marks the safest and thus preferred location to open into the third ventricle medial to the choroid plexus through the tenia fornicis. The yellow dashed line (indicating caution) marks an alternative option to open into the third ventricle through the thalamus, but it risks injuring the thalamostriate vein. The red dashed line marks the column of the fornix, which should never be violated.
- CN = cranial nerve.
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