myasthenia (redirected from myasthenic)

myasthenia /my·as·the·nia/ (mi?as-the´ne-ah) muscular debility or weakness.myasthen´ic

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familial infantile myasthenia gravis  an inherited disorder of infants, characterized by feeding difficulties, episodes of apnea, ophthalmoparesis, and weakness or fatigue, often improving with age.

myasthenia gas´trica  weakness and loss of tone in the muscular coats of the stomach; atony of the stomach.

myasthenia gra´vis  an autoimmune disease of neuromuscular function, possibly due to presence of antibodies to acetylcholine receptors at the neuromuscular junction, marked by fatigue and exhaustion of the muscular system, often with fluctuating severity, without sensory disturbance or atrophy.

neonatal myasthenia  a transient myasthenia affecting offspring of myasthenic women.

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my·as·the·ni·a (ms-thn-)

n.

1. Abnormal muscular weakness or fatigue.

2. Myasthenia gravis.

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myas·thenic (-thnk) adj.

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myasthenia (mīˈ·s·thēˑ·nē·),

n a condition distinguished by weakness in a muscle or a group of muscles due to a systemic myoneural disturbance.

Myasthenia.

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myasthenia

primary skeletal muscle weakness in the absence of nervous system lesions or myositis or myodystrophy. For the most part the weakness is reversible or temporary. Examples amongst animal diseases are myasthenia gravis, hypocalcemia, hypopotassemia, hypoglycemia, and many plant toxins that cause the so-called staggers syndromes in food animals.

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angiosclerotic myasthenia

excessive muscular fatigue due to vascular changes; intermittent claudication.

myasthenia gastrica

weakness and loss of tone in the muscular coats of the stomach; atony of the stomach.

myasthenia gravis

a syndrome of muscular weakness that is aggravated by activity and relieved by rest. There is no muscular atrophy or loss of sensation. Affected dogs and cats show predominantly episodic weakness, but various other manifestations, such as laryngeal paralysis, dysphagia and megaesophagus, may also be seen. Clinical signs are rapidly reversed by anticholinesterase drugs and this is used as a diagnostic test for the disease. It may be congenital or acquired as an autoimmune disease, inherited in some breeds.

paraneoplastic myasthenia gravis

seen in association with neoplasms and other lesions of the thymus.