<prompt> Brightons criteria is used for:Guillain Barre SyndromeMyasthenia GravisPolymyositisMuscular dystrophy  <response>: A GBS Brighton criteria also account for the level of diagnostic certainty based on the presenting findings at clinical and additional examinations, ranging from level 1 highest level of diagnostic certainty to level 4 reported as Guillain-Barre syndrome, possibly due to insufficient data for further classification as shown in below table.KEY BRIGHTON DIAGNOSTIC CRITERIA FOR GUILLAIN-BARRE SYNDROMEDiagnostic criteriaLevel of diagnostic certainty I1234Bilateral and flaccid weakness of limbs-Decreased or absent deep tendon reflexes in weak limbs-Monophasic course and time between onset-nadir 12 h to 28 days-CSF cell count 50ml--CSF protein concentration normal value---Nerve conduction studies findings consistent with subtypes of GBS---Absence of alternative diagnosis for weakness Present; - Absent; - present or absent;When CSF is not available, nerve electrophysiology results must be consistent with the diagnosis of Guillain-Barre syndrome. Level 1 is the highest level of diagnostic certainty, whereas Level 4 is the lowest level of diagnostic certainty 