| A | B |
|---|
| Vestibulocerebellum | Anatomical Location: Flocculonodular lobe |
| Spinocerebellum- medial part | Anatomical Location: Vermis |
| Spinocerebellum- lateral part | Anatomical Location: Intermediate part of hemisphere |
| Cerebrocerebellum | Anatomical Location: Lateral part of hemisphere |
| Vestibulocerebellum | Principal input:Vestibular labyrinth |
| Spinocerebellum- medial part | Principal input:Vestibular labyrinth, proximal body parts, facial, visual, and auditory inputs to posterior lobe only |
| Spinocerebellum- lateral part | Principal input: Spinal afferents (distal muscles of limbs) |
| Cerebrocerebellum | Principal input: Cortical afferents |
| Vestibulocerebellum | Deep Nuclei - output: Lateral vestibular |
| Spinocerebellum- medial part | Deep Nuclei - output: Fastigial |
| Spinocerebellum- lateral part | Deep Nuclei - output: Interposed (Globose and Embeliform) |
| Cerebrocerebellum | Deep Nuclei - output: Dentate (Largest nucleus) |
| Vestibulocerebellum | Principal destination:Medial systems: axial motor neurons and control of eye muscles |
| Spinocerebellum- medial part | Principal destination:Medial systems: vestibular nucleus, reticular formation, and motor cortex |
| Spinocerebellum- lateral part | Principal destination: Lateral systems: red nucleus (magnocellular part) and motor cortex for distal limb muscles. |
| Cerebrocerebellum | Principal destination: Integration areas: red nucleus (parvocellular part) and premotor cortex (area 6) |
| Vestibulocerebellum | Function:Axial control and vestibular reflexes. Stability of eye movements. |
| Spinocerebellum- medial part | Function: Axial and proximal limb motor control; regulation of ongoing execution of movement |
| Spinocerebellum- lateral part | Function: Distal motor control; regulation of ongoing execution |
| Cerebrocerebellum | Function:Motor learning, initiation, planning, and timing |
| Consequences of lesions: Vestibulocerebellum | Loss/reduction of postural stability. Ataxic gait (improves on lying down), wide-based posture, nystagmus. |
| Consequences of lesions: Spinocerebellum- medial part | Ataxic gait (does not improve on lying down). Titubation – truncal tremors during standing or sitting. Truncal ataxia |
| Consequences of lesions: Spinocerebellum- lateral part | Action tremors. Ataxia of limb movements. |
| Consequences of lesions:Cerebrocerebellum | Dysdiadocho-kinesia – inability to perform rapidly alternating movements. Decomposition of movement. |
| Vestibulocerebellum | (Phylogenetically oldest) |
| Cerebrocerebellum | (Phylogenetically most recent) |
