Jolly's test
Encyclopedia
Jolly's test is a medical test
Medical test
A diagnostic test is any kind of medical test performed to aid in the diagnosis or detection of disease. For example:* to diagnose diseases, and preferably sub-classify it regarding, for example, severity and treatability...

 used to distinguish the muscle weakness found in myasthenia gravis
Myasthenia gravis
Myasthenia gravis is an autoimmune neuromuscular disease leading to fluctuating muscle weakness and fatiguability...

 and Eaton-Lambert syndrome. Jolly's test is a type of electromyography
Electromyography
Electromyography is a technique for evaluating and recording the electrical activity produced by skeletal muscles. EMG is performed using an instrument called an electromyograph, to produce a record called an electromyogram. An electromyograph detects the electrical potential generated by muscle...

 which uses repeated stimulation of motor nerves to demonstrate the fatiguability found with repeated muscle contraction
Muscle contraction
Muscle fiber generates tension through the action of actin and myosin cross-bridge cycling. While under tension, the muscle may lengthen, shorten, or remain the same...

 which is seen in myasthenia but not Eaton-Lambert syndrome.

The test is named after Friedrich Jolly
Friedrich Jolly
Friedrich Jolly was a German neurologist and psychiatrist who was a native of Heidelberg, and the son of physicist Philipp von Jolly ....

.
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