Neuromuscular Junction Diseases — MCQs

The diagnosis of myasthenia gravis is made by a positive edrophonium test, repetitive nerve stimulation test of a weak muscle, and anti-acetylcholine receptor antibody assay. MRI of the mediastinum is now indicated to:

Sequence the events in neuromuscular action potential conduction: 1. Sodium channels open in the end plate 2. Calcium enters at the nerve terminal 3. Release of acetylcholine

Lambert-Eaton Myasthenic Syndrome is associated with?

Which of the following is the MOST characteristic feature of Eaton-Lambert syndrome?

The electromyogram (EMG) is least useful for the diagnosis of:

A person was given a muscle relaxant that competitively blocks nicotinic receptors. Which of the following drugs is used for reversal of muscle relaxation after surgery?

What is the mechanism of action of Curare drugs as muscle relaxants?

Diffuse axonal injury is characterized by lesion at:

A middle-aged woman suffers from weakness of her ocular and facial muscles, which worsens with repeated use. She has antibodies to acetylcholine receptors in her serum. The likely diagnosis is:

What is the histological appearance of the brain in Creutzfeldt-Jakob disease?