Jun 18, 2017 · Vertical smile in a patient with congenital myasthenia gravis, the "myasthenic snarl." The diagnosis of congenital myasthenia was made by Dr. Robert T. Leshner after she had carried a diagnosis of muscular dystrophy for many years.

A "myasthenic snarl" may be observed when the patient attempts to smile. The snarl follows contraction of the middle portion of the upper lip while the upper mouth corners fail to contract. On examination, many patients exhibit weak forced eye closure …

Jun 22, 2023 · Myasthenia gravis (my-us-THEE-nee-uh GRAY-vis) causes muscles under your voluntary control to feel weak and get tired quickly. This happens when the communication between nerves and muscles breaks down. There's no cure for myasthenia gravis. Treatment can help with symptoms.

Feb 28, 2025 · Myasthenic crisis is a complication of myasthenia gravis (MG) that can cause a breathing emergency. Prevention can involve avoiding known triggers, such as infection, trauma, surgery, or...

Myasthenia gravis is a potentially fatal neuromuscular disorder, but myasthenic patients typically lead normal lives when properly diagnosed and managed. In this article, the author reviews the immunopathogenesis, clinical features, diagnostic evaluation, and treatment of myasthenia gravis.

The myasthenic facies and snarl J Clin Neuromuscul Dis. 2000 Jun;1(4):214-5. doi: 10.1097/00131402-200006000-00010. Author J F Howard 1 Affiliation 1 From the Department of Neurology and the Laboratory for myasthenia Gravis Research, The University North Carolina at Chapel Hill. PMID: 19078590 DOI: 10.1097 ...

Mar 3, 2025 · Common symptoms of myasthenia gravis include double vision, eyelid drooping, facial weakness, and sometimes breathing difficulty. Myasthenia gravis can flare up due to infection, stress, certain medications, or anesthesia for surgery. Myasthenia gravis is an autoimmune condition.

Dec 5, 2023 · Attempts to smile result in contraction of the medial portion of the upper lip and horizontal contraction of the corners of the mouth with loss of the natural upward curling, giving the patient's...

or laugh. A classical feature is the myasthenic sneer (“snarl” or the “rire verticale,” Fig. 6.1a). Since weakness of the upper part of the face is also present, laughing makes the eyelids droop, even if ptosis is not noticeable at rest. Orbicularis oris weakness is first noticed by the inability to whistle or kiss, in sneezing force-

Myasthenia gravis is a chronic autoimmune disorder in which the body attacks its own neuromuscular connections. This causes problems with communication between nerves and muscle, resulting in weakness. Myasthenia gravis affects the voluntary muscles of the body, especially the eyes, mouth, throat, and limbs.