primary motor cortex morphology trait primary motor cortex ribonucleic acid amount 2025-10-14T19:27:40Z CMO:0004113 The proportion, quantity, or volume of ribonucleic acid in 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. Ribonucleic acid is a high molecular weight, linear polymer composed of nucleotides containing ribose and linked by phosphodiester bonds. Trait.ontology VT:0011232 motor cortex RNA amount motor cortex ribonucleic acid amount primary motor cortex RNA amount cerebral cortex ribonucleic acid amount