has part has part has_part characteristic of part of has modifier abnormal neural tube mantle layer morphology abnormal spinal cord alar plate morphology abnormal spinal cord alar column morphology MP:0009692 abnormal spinal cord alar lamina morphology any structural anomaly of the region of the mantle layer of the neural tube that lies dorsal to the sulcus limitans and contains primarily sensory neurons and interneurons involved in communication of sensory impulses; the alar plate develops into the dorsal horn in the grey matter of the spinal cord MPheno.ontology morphology abnormal spinal cord alar plate