Neuromuscular

Home, Search, Index, Links, Pathology, Molecules, Syndromes,
Muscle, NMJ, Nerve, Spinal, Ataxia, Antibody & Biopsy, Patient Info


MYASTHENIA GRAVIS: DIAGNOSTIC TESTS

Antibodies
  Anti-AChR
  MuSK
  Striational
  Other
General principles
Other diagnostic tests
Repetitive nerve stimulation
Single fiber EMG
Tensilon testing
Decrement of CMAP at 3 Hertz RNS
Decremental response to RNS in Myasthenia Gravis


General Principles of Diagnostic Testing for MG


Edrophonium (Tensilon) Testing

General Method Positive test Utility of Tensilon test

Serum antibodies vs Acetylcholine Receptors


Muscle AChR
(Adult)

Repetitive Nerve Stimulation (RNS): 2 to 3 Hz


RNS: General

Repetitive Nerve Stimulation


From: M Al-Lozi
RNS in Myasthenia Gravis Also see: Rapid RNS


Single fiber electromyography (SFEMG)


Normal SFEMG

Increased jitter: MG patient
From: M Al-Lozi




Return to Myasthenia gravis
Return to Myasthenic Syndromes

References
1. Autoimmunity 2003;36:151154
2. JNNP 2012; Online July
3. Arch Neurol 2012; Online June

7/17/2012