Hemispheres 3.0 – Level I Brain Anatomy and Physiology Practice Test 2026: Your All-in-One Study Resource for Exam Success!

The main idea here is that different parts of the cerebellum specialize in coordinating different body regions. The midline structure, the vermis, is the region that handles trunk and axial muscle control, integrating sensory input from proprioceptors and the vestibular system to produce smooth, coordinated movement of the trunk from the neck down to the hips. That axial control is essential for posture, balance, and gait, which is why the vermis is the best fit for coordinating trunk movements.

The other regions have different primary roles: the flocculonodular lobe focuses on balance and eye movements; the anterior lobe is more involved with coordinating limb movements as part of the spinocerebellum; and the posterior lobe is linked to planning and refining voluntary movements of the limbs.