Rostrocaudal and laminar distribution of spinothalamic neurons in the high cervical spinal cord of the cat

In the cat, retrogradely labelled spinothalamic tract cells were found in contralateral medial laminae VI and lateral laminae VII-VIII and ipsilateral lateral laminae VII-VIII and medial laminae VI of the C1, C2, C3 and C4 segments. The proportion of cells in each ipsilateral laminae was similar in each segment but the proportion in contralateral medial laminae VI decreased while the proportion in contralateral laminae VII-VIII increased caudally.