The vermispart of the spinocerebellum controls (via proxy) and, in conjunction with the vestibulocerebellum, the axial (trunk, neck, shoulder and hip) muscles by means of signal outflow from the nucleus fastigii and is responsible for the upright posture and for various gaits.
The intermediate hemisphere portion of the spinocerebellum controls (via proxy) the limb muscles by means of signal outflow from the nucleus globosus and nucleus emboliformis (i.e. from the nucleus interpositus).
The spinocerebellum is considered above all to control the interaction between synergists and antagonists in individual joints, rather than coordinating a succession of movements in several joints. Here, the supreme position of the spinocerebellum in tuning the activity of the gamma-motor neuron, and thus modifying the stretch reflex, probably plays a major role.
Damage to the spinocerebellum causes balance difficulties in standing, sitting and while moving (ataxia) as well as intentional strokes of varying severity.