--have certainly been associated with neuropathy, especially in those areas where nerves pass through narrow channels, such as the carpal and tarsal tunnels (this seems to be related to fluid swelling and depositing of metabolic waste products not eliminated properly when metabolism slows).

http://emedicine.medscape.com/article/1171051-overview

http://neuromuscular.wustl.edu/msys/mend.htm#thyroid