Hemisphere with Hedgehog Spikes (2 pieces) with Pump. This hemisphere is designed for sensorimotor therapy exercises and is an integral part of movement therapy and rehabilitation. Hedgehog exercises help stretch tight muscles and increase joint mobility. The hemisphere’s surface is covered with spikes that massage the skin of the feet, stimulate sensory receptors, and improve blood circulation. Performed correctly, these exercises stimulate proprioception, which is crucial for proper movement.