Question

multiple choice 2 points

in which structure is the arbor vitae found?
tegmentum in the midbrain
left cerebral hemisphere
reticular formation
diencephalon
cerebellum

Explanation:

Identify the target anatomical structure

The question asks for the location of the "arbor vitae". The term "arbor vitae" is Latin for "tree of life," which refers to the branching, tree-like appearance of the white matter in a specific brain structure.

Connect the structure to brain anatomy

Using our knowledge of Brain Anatomy, we recall that the cerebellum consists of an outer cortex of gray matter and an inner core of white matter. When cut in a sagittal section, this inner white matter exhibits a highly branched, tree-like pattern that brings sensory and motor information to and from the cerebellar cortex.

Evaluate the given options

• Tegmentum in the midbrain: Contains multi-synaptic networks, nuclei, and pathways, but does not contain the arbor vitae.
• Left cerebral hemisphere: The white matter here forms the corona radiata and internal capsule, not the arbor vitae.
• Reticular formation: A diffuse network of nerve pathways in the brainstem.
• Diencephalon: Comprises structures like the thalamus and hypothalamus.
• Cerebellum: This is the correct anatomical site containing the arbor vitae.

Answer:

• Tegmentum in the midbrain
• Left cerebral hemisphere
• Reticular formation
• Diencephalon
• Cerebellum (Correct answer)