Slice B/W shows which structures?

Slice B/W shows which structures?

• A. Third ventricle, Quadrigeminal cistern, Sylvian fissure; Pars opercularis; Wernicke area (swallowing)
• B. Lateral ventricle body; Supramarginal gyrus
• C. Choroid plexus; Atrium
• D. Fourth ventricle; Cerebellum

Answer: (A)

The key idea is mapping what you see on a cross‑section to major landmarks that span midline and cortex. On a single brain slice you can orient yourself by locating the midline ventricles and cisterns, then the lateral boundary marked by the Sylvian fissure, and finally the cortical areas around that fissure. Seeing the third ventricle in the midline between the thalami, plus the quadrigeminal cistern tucked behind the midbrain, places you at a level that can also reveal the Sylvian fissure as the major lateral boundary. Along and just above this fissure lie the opercular part of the inferior frontal gyrus (pars opercularis) and, posteriorly along the superior temporal gyrus near the fissure, Wernicke’s area. This combination—midline ventricular/cistern landmarks with lateral frontal and temporal language-related cortex around the Sylvian fissure—best matches the structures listed. The other options describe structures that either belong to different levels or regions (for example, posterior fossa features like the fourth ventricle and cerebellum) or focus on ventricle contents or parietal cortex without tying in the Sylvian fissure and the surrounding language cortex seen on the same slice.

The key idea is mapping what you see on a cross‑section to major landmarks that span midline and cortex. On a single brain slice you can orient yourself by locating the midline ventricles and cisterns, then the lateral boundary marked by the Sylvian fissure, and finally the cortical areas around that fissure.

Seeing the third ventricle in the midline between the thalami, plus the quadrigeminal cistern tucked behind the midbrain, places you at a level that can also reveal the Sylvian fissure as the major lateral boundary. Along and just above this fissure lie the opercular part of the inferior frontal gyrus (pars opercularis) and, posteriorly along the superior temporal gyrus near the fissure, Wernicke’s area. This combination—midline ventricular/cistern landmarks with lateral frontal and temporal language-related cortex around the Sylvian fissure—best matches the structures listed.

The other options describe structures that either belong to different levels or regions (for example, posterior fossa features like the fourth ventricle and cerebellum) or focus on ventricle contents or parietal cortex without tying in the Sylvian fissure and the surrounding language cortex seen on the same slice.