Question

White matter in cerebellum is arranged in the form of patches called

• A. arbor vitae
• B. Purkinje cells
• C. aqueduct of Sylvius
• D. substantia nigra

Answer 1

The correct option is A arbor vitae

White matter in cerebellum is arranged in the form of patches, giving the appearance of a tree-like structure called arbor vitae or tree of life (it has white matter, gray matter and neuroglial cells).
Cerebellum contains the most complex neurons of the brain known as Purkinje cells.
Aqueduct of sylvius, also known as Iter, serves to connect the III${}^{\mathrm{rd}}$ ventricle with the IV${}^{\mathrm{th}}$ ventricle.
Midbrain also contains various other nuclei such as the left and the right substantia nigra which are largely and densely pigmented. Neurons that release dopamine, extending from the substantia nigra to the basal ganglia, help control subconscious muscle activities.