The interthalamic adhesion is formed by which thalamic region?

The interthalamic adhesion is formed by which thalamic region?

• A. Lateral Posterior Nucleus
• B. Interthalamic adhesion
• C. Midline Nuclei
• D. Corpus callosum

Answer: (C)

This question tests understanding of what forms the massa intermedia, the bridge that links the two thalami across the third ventricle. That bridge is made by the midline nuclei of the thalamus—the group of nuclei along the midline that cross from one thalamus to the other. So the interthalamic adhesion is formed by these midline nuclei. The lateral posterior nucleus is a distinct thalamic nucleus involved in sensory processing, not the source of the adhesion. The corpus callosum is a white matter tract between hemispheres and does not form the thalamic bridge.

This question tests understanding of what forms the massa intermedia, the bridge that links the two thalami across the third ventricle. That bridge is made by the midline nuclei of the thalamus—the group of nuclei along the midline that cross from one thalamus to the other. So the interthalamic adhesion is formed by these midline nuclei. The lateral posterior nucleus is a distinct thalamic nucleus involved in sensory processing, not the source of the adhesion. The corpus callosum is a white matter tract between hemispheres and does not form the thalamic bridge.