Question

what structure is highlighted?

a. optic chiasm
b. lens
c. anterior chamber
d. optic n. (cn ii)
e. optic tract

Explanation:

Identify the view of the brain

The image shows an inferior (ventral) view of the human brain, with the anterior frontal lobes at the top and the posterior cerebellum and brainstem at the bottom.

Locate the highlighted structure

Using the Optic Chiasm Anatomy knowledge point
The highlighted green structure is located at the midline, anterior to the pituitary stalk region and hypothalamus, where the two optic nerves meet and cross.

Differentiate from surrounding structures

Using the Optic Chiasm Anatomy knowledge point

• The structures extending anteriorly from this junction are the optic nerves (CN II).
• The structures extending posteriorly and laterally from this junction are the optic tracts.
• The highlighted green region is the central crossing point, which is the optic chiasm.

Answer:

• A. Optic chiasm (Correct answer)
• B. Lens
• C. Anterior chamber
• D. Optic n. (CN II)
• E. Optic tract