Word Origin and History for mesopotamian. ancient name for the land that lies between the Tigris and Euphrates rivers (in modern Iraq), from Greek mesopotamia (khora), literally a country between two rivers, from fem. of mesopotamos, from mesos middle (see medial (adj.)) + potamos river (see potamo-).
Monogenic forms, caused by a single mutation in a dominantly or recessively inherited gene, are well-established, albeit relatively rare types of PD. They collectively account for about 30% of the familial and 3%â5% of the sporadic cases.
In agreement with recessive inheritance of X-linked myotubular myopathy, heterozygous carriers of MTM1 gene mutations are usually asymptomatic, although mild facial weakness has been reported (Heckmatt et al., 1985; Wallgren-Pettersson et al., 1995). Tanner et al.