Guillain-Barré (ghee-yan bah-ray) syndrome (GBS) is a rare inflammatory disorder in which the body’s immune system attacks the protective covering of the peripheral nerves (myelin sheath), preventing the nerves from sending signals to the muscles.
MMN (Multifocal Motor Neuropathy) is a rare disorder in which focal areas of multiple motor nerves are attacked by one’s own immune system.
Typically, MMN is slowly progressive, resulting in asymmetrical weakness of a patient’s limbs.
Patients frequently develop weakness in their hand(s), resulting in dropping of objects or sometimes inability to turn a key in a lock.The weakness associated with MMN can be recognized as fitting a specific nerve territory.
There is essentially no numbness, tingling, or pain. Patients with MMN can have other symptoms, including twitching, or small random dimpling of the muscle under the skin which neurologists call fasciculations.