Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Multifocal motor neuropathy ?
    ### Response:
    What are the signs and symptoms of multifocal motor neuropathy? Signs and symptoms of multifocal motor neuropathy (MMN) may include weakness; cramping; involuntary contractions or twitching; and wasting (atrophy) of affected muscles. Atrophy occurs late in the course of the condition.
    