<prompt> Answer this question truthfullyWhat other diagnostic studies can be done for Guillain-Barré syndrome?  <response>: <reason> Nerve conduction studies and needle electromyography may be helpful in the diagnosis of Guillain Barre syndrome and differentiating various sub types.Findings diagnostic of Guillain Barre syndrome include: In demyelinating forms: Reduced conduction velocity of motor nerves. Increased distal motor latency. Increased latency of F wave. conduction block Temporal scattering In axonal forms: Reduced amplitude of distal motor andor sensory nerve impulses. Conduction block of motor nerves. 