Decreased functionality of the muscle tissue.
http://purl.obolibrary.org/obo/UPHENO_0066916
http://purl.obolibrary.org/obo/UPHENO_0066921
http://purl.obolibrary.org/obo/UPHENO_0002356
http://purl.obolibrary.org/obo/UPHENO_0066908