Sagittal Perspective of Nasal Contents, Cerebellum, Brainstem, and Cerebrum. The cerebrum has been dissected to permit demonstration of the internal capsule and deep brain nuclei. The lentiform nucleus is composed of the putamen and globus pallidus. The brainstem has been dissected to demonstrate the corticospinal tract descending within the basis pons. The endoscope in the image is positioned transnasally, illuminating the anterior wall of the sphenoid sinus. (Image courtesy of M Nunez)