23, Table 1); stalks glossy brown, broad apical parts blackish pruinose posteriorly, funiculus
uniformly brown, clothed in whitish pruinosity, IVB small, almost equal to diameter of eye stalk, base of IVB a minuscule elevation of about 0.
For example, Yamashita et al suggested that the extent of vacuolation of the dorsal funiculus
was in the order of lignocaine=tetracaine >bupivacaine >ropivacaine (2).
Sasaki et al (45) observed that the dorsal funiculus
of the spinal cord was demyelinated with X-irradiation treatment, followed by microinjection of ehidium bromide.
Tissue sparing at the site of SCI could possibly have the secondary effect of providing a descending pain inhibitory system with greater integrity as a result of neuroprotection; more specifically, the sparing of descending fibers such as the serotonergic medullary raphespinal tract that travels in the dorsolateral funiculus
 and/or the catecholaminergic coerulospinal pathway originating in A5 and other nuclei could have this effect .
Moriyasu and Lanteigne (1998) described 14 developmental stages that roughly correspond to the 12 identified for BKC, plus two earlier stages prior to, and during, funiculus
formation; analysis of morphometry did not distinguish such stages in BKC embryos.