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.
The name of the region is a compound of two Persian words Panj (five) and Äb (water) and was introduced to the region by the Turko-Persian conquerors of India and more formally popularised during the Mughal Empire. Punjab literally means (The Land of) Five Waters referring to the rivers: Jhelum, Chenab, Ravi, Sutlej, and Beas.