Question

central sulcus
septum pellucidum
selle turcica
corpus callosum

Explanation:

Identify the highlighted structure

Using the Brain Anatomy knowledge point, we observe a sagittal view of the human brain inside the skull. A prominent, C-shaped nerve fiber bundle is highlighted in bright pink/magenta. This structure sits superior to the lateral ventricles and connects the left and right cerebral hemispheres.

Match with the options

The highlighted C-shaped structure is the corpus callosum, which is the primary commissural pathway of the brain. Let's evaluate the given choices:

• central sulcus: A groove on the lateral surface of the cerebral cortex, not a deep medial C-shaped structure.
• septum pellucidum: A thin, vertical membrane separating the anterior horns of the left and right lateral ventricles, located inferior to the corpus callosum.
• sella turcica: A saddle-shaped depression in the sphenoid bone hosting the pituitary gland, located at the skull base.
• corpus callosum: The large, C-shaped nerve fiber bundle highlighted in pink.

Answer:

• central sulcus
• septum pellucidum
• sella turcica
• corpus callosum (Correct answer)