Marker. 1  Noun. A line of credit extended by a casino or cardroom. 2  Noun. A small object placed on top of a player's hand for the purpose of preventing it from being mucked or fouled. 3  Noun. A plastic device used to denote who is in the dealer's position.
Myasthenia gravis is caused by a defect in the transmission of nerve impulses to muscles. It occurs when normal communication between the nerve and muscle is interrupted at the neuromuscular junction -- the place where nerve cells connect with the muscles they control.
Myasthenia Gravis Article. 1  Myasthenia gravis facts*. 2  What is myasthenia gravis? 3  What causes myasthenia gravis? 4  What is the role of the thymus gland in myasthenia gravis? 5  What are myasthenia gravis symptoms and signs? 6  Who gets myasthenia gravis? 7  How is myasthenia gravis diagnosed? 8  What is the treatment for myasthenia gravis? 9  What are myasthenic ...