Hard Spin FUN w/LIFEAGENTEX: BPM Pedal, RPM Breath, and Frequency Focus: Reprogramming Neural Rhythms via Chemoreceptor Cycling. ExBiked or unbiked, the medulla oblongata links the brainstem to the spinal cord. The corticospinal and corticobulbar tracts, essential for movement, form triangular bundles called medullary pyramids, due to the ridges on the brainstem's surface. ... EXBIKE PE MUSIC on www.GAZEBOZEN.store