Of 22 rabbits sensitized with GD1b, 12 developed experimental sensory ataxi
c neuropathy. The affected rabbits had a higher level of serum IgG monospec
ific to GD1b than the unaffected ones. The GD1b-positiue neuronal cyoplasms
of rabbit dorsal root ganglia had larger diameters than the negative ones.
IgG antibody monospecific to GD1b may preferentially bind to large primary
sensory neurons, causing sensory ataxic neuropathy.