**4.2 Secondary order neurons: the medial stilling-Clarke's (***nucleus dorsalis***) and lateral Bechterew's columns**

The secondary order neurons of the proprioceptive pathways are localized at the base of the dorsal horn of the spinal cord, in correspondence with the VII Rexed's lamina, also known as the intermediate zone of the spinal cord. In this place two nuclear columns were classically considered: the nucleus dorsalis of Clarke (also known as Clarke's column, dorsal nucleus, posterior thoracic nucleus) and the medial nucleus (also known as Bechterew's nucleus). The axons of the neurons localized at these places form the spinocerebellar tracts.
