substance p and neurokinin alpha were found to be distributed in a very similar manner with fairly constant molar ratios i.e . ratios of substance p to neurokinin alpha were 3.69 in the dorsal root ganglia , 3.49 in the dorsal root and 3.09 in the dorsal horn of the cervical spinal cord .
C0017070
dorsal root
C0228564
the dorsal horn of