First-order neurons of the anterior spinocerebellar tract:

First-order neurons of the anterior spinocerebellar tract provide the afferent limb for muscle stretch reflexes. found in the spinal ganglia from L1 to S2 and synapse on spinal border cells. First-order neurons of the anterior spinothalamic and posterior spinocerebellar tracts project axons into the medial root entry zone first-order neurons of the posterior column-medial lemniscus pathway gives rise to the fasciculus gracilis and cuneatus first-order neurons of the lateral spinothalamic tract project axons the posterolateral tract (of Lissauer).