Transverse Myelitis (TM) is a disorder caused by inflammation of the spinal cord. It is characterized by symptoms and signs of neurologic dysfunction in motor and sensory tracts on both sides of the spinal cord.The involvement of motor and sensory control pathways frequently produce altered sensation, weakness and sometimes urinary or bowel dysfunction.There are four classic symptoms of transverse myelitis: 1  weakness in the arms/legs. 2  sensory symptoms such as numbness or tingling. 3  pain and discomfort.4  bladder dysfunction and/or bowel motility problems.he involvement of motor and sensory control pathways frequently produce altered sensation, weakness and sometimes urinary or bowel dysfunction. There are four classic symptoms of transverse myelitis: 1  weakness in the arms/legs. 2  sensory symptoms such as numbness or tingling. 3  pain and discomfort.