A branch of the Group III afferent synapse an excitatory interneuron, which extends its axon across the midline into the contralateral spinal cord. At that location, the interneuron excites the alpha motor neurons that innervate the extensor muscles of the opposite leg.
The name of the land between two rivers is called Doab. It has 3 districts called Upper or Meerut, Middle or Agra, and Lower or Allahabad Doab.
Geography of Mesopotamia. The word Mesopotamia means the Land between the Rivers--in this case, the rivers are the Tigris (Tie-grus) River and the Euphrates (You-fray-teez) River. It was about 300 miles long and about 150 miles wide. You could look on a map of the world ALL day long for Mesopotamia, and you'd probably never find it.