Understanding White Matter and Commissural Fibers

What is the primary role of projection fibers in the brain?

• Connecting the same cortical areas in opposite hemispheres

• Connecting the two temporal lobes

• Connecting different regions within the same hemisphere

• Connecting the cortex with the brainstem and spinal cord

Which structure is the largest white matter structure in the brain?

• Posterior commissure

• Corpus callosum

• Habenular commissure

• Anterior commissure

What is the function of the anterior commissure?

• Involved in the pupillary light reflex

• Connecting the habenula nuclei

• Connecting the two hippocampi

• Connecting the two temporal lobes

Which commissure is involved in the bilateral pupillary light reflex?

• Anterior commissure

• Posterior commissure

• Habenular commissure

• Hippocampal commissure

What is the role of the habenular commissure?

• Connecting the two hippocampi

• Involved in the pupillary light reflex

• Involved in sleep-wake cycles and stress responses

• Connecting the two temporal lobes