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Which brain structure sends major input to the ventral lateral nucleus?

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Diagram of a human brain showing a median sagittal section, highlighting the fourth ventricle and cerebellum in the hindbrain, with labeled anatomical structures including the pons, medulla oblongata, and central canal of the spinal cord. — thalamus Sagittal section of the human brain, showing structures of the cerebellum, brainstem, and cerebral ventricles.

The ventral lateral (VL) nucleus of the thalamus receives its major input from the cerebellum. In addition to this primary cerebellar input, the VL nucleus also receives supplementary afferents from the red nucleus and the vestibular nuclei. This structure plays a critical role in balance and fine motor control.1