cerebral cortex morphology trait precentral gyrus morphology trait primary motor cortex morphology trait 2025-10-14T19:20:16Z VT:0011231 Any measurable or observable characteristic related to the shape, structure, color, or pattern of the part of the cerebral cortex that receives projections from the motor thalamus and which projects to motor neurons in the brainstem and spinal cord; the primary motor cortex, or M1, is located on the precentral gyrus and on the anterior paracentral lobule on the medial surface of the brain. motor cortex morphology trait Trait.ontology