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  2. Spinal muscular atrophy - Wikipedia

    en.wikipedia.org/wiki/Spinal_muscular_atrophy

    Spinal muscular atrophy (SMA) is a rare neuromuscular disorder that results in the loss of motor neurons and progressive muscle wasting. [3][4][5] It is usually diagnosed in infancy or early childhood and if left untreated it is the most common genetic cause of infant death. [6] It may also appear later in life and then have a milder course of ...

  3. Spinal muscular atrophies - Wikipedia

    en.wikipedia.org/wiki/Spinal_muscular_atrophies

    Spinal muscular atrophies. Spinal muscular atrophies (SMAs) are a genetically and clinically heterogeneous group of rare debilitating disorders characterised by the degeneration of lower motor neurons (neuronal cells situated in the anterior horn of the spinal cord) and subsequent atrophy (wasting) of various muscle groups in the body. [1]

  4. Progressive muscular atrophy - Wikipedia

    en.wikipedia.org/wiki/Progressive_muscular_atrophy

    Progressive muscular atrophy (PMA), also called Duchenne–Aran disease and Duchenne–Aran muscular atrophy, is a disorder characterised by the degeneration of lower motor neurons, resulting in generalised, progressive loss of muscle function. PMA is classified among motor neuron diseases (MND) where it is thought to account for around 4% of ...

  5. Motor neuron diseases - Wikipedia

    en.wikipedia.org/wiki/Motor_neuron_diseases

    (A) He needs assistance to stand. (B) Advanced atrophy of the tongue. (C) There is upper limb and truncal muscle atrophy with a positive Babinski sign. (D) Advanced thenar muscle atrophy. [8] Signs and symptoms depend on the specific disease, but motor neuron diseases typically manifest as a group of movement-related symptoms. [6]

  6. Distal spinal muscular atrophy type 1 - Wikipedia

    en.wikipedia.org/wiki/Distal_spinal_muscular...

    Neurology. Distal spinal muscular atrophy type 1 (DSMA1), also known as spinal muscular atrophy with respiratory distress type 1 (SMARD1), is a rare neuromuscular disorder involving death of motor neurons in the spinal cord which leads to a generalised progressive atrophy of body muscles. The condition is caused by a genetic mutation in the ...

  7. Spinal and bulbar muscular atrophy - Wikipedia

    en.wikipedia.org/wiki/Spinal_and_bulbar_muscular...

    A cramp is a sudden, involuntary, painful skeletal muscle contraction of skeletal muscle, and common in motor neuron disorders. Bulbar symptoms (weakness of the facial and tongue muscles) typically follow limb manifestations and may start with difficulty with speech articulation (dysarthria) before swallowing difficulty (dysphagia). [ 3 ][ 5 ...

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