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ALS is the most common form of the motor neuron diseases. [8] ALS often presents in its early stages with gradual muscle stiffness, twitches, weakness, and wasting. [3] Motor neuron loss typically continues until the abilities to eat, speak, move, and, lastly, breathe are all lost. [3]
In ALS the main type of onset is bulbar followed by limb-onset ALS which describes the region of motor neurons first affected. [3] Individuals may also present with respiratory-onset ALS, [7] but this occurs very rarely. Since there are three different types of ALS, ALSFRS-R scores are often grouped in categories depending on type of onset. [7]
Weakness can be symmetric or asymmetric, and it can occur in body parts that are distal, proximal, or both. According to Statland et al., there are three main weakness patterns that are seen in motor neuron diseases, which are: [6] [9] Asymmetric distal weakness without sensory loss (e.g. ALS, PLS, PMA, MMA)
Multifocal motor neuropathy (MMN) is a progressively worsening condition where muscles in the extremities gradually weaken.The disorder, a pure motor neuropathy syndrome, is sometimes mistaken for amyotrophic lateral sclerosis (ALS) because of the similarity in the clinical picture, especially if muscle fasciculations are present.
Articles relating to amyotrophic lateral sclerosis (ALS), also known as motor neurone disease (MND) or Lou Gehrig's disease. It is a specific disease which causes the death of neurons controlling voluntary muscles. ALS is characterized by stiff muscles, muscle twitching, and gradually worsening weakness due to muscles decreasing in size.
There is no proven treatment for fasciculations in people with ALS. Among patients with ALS, fasciculation frequency is not associated with the duration of ALS and is independent of the degree of limb weakness and limb atrophy. No prediction of ALS disease duration can be made based on fasciculation frequency alone. [2]
Muscle fatigue is when muscles that were initially generating a normal amount of force, then experience a declining ability to generate force. It can be a result of vigorous exercise , but abnormal fatigue may be caused by barriers to or interference with the different stages of muscle contraction .
Muscle weakness is a lack of muscle strength. Its causes are many and can be divided into conditions that have either true or perceived muscle weakness. True muscle weakness is a primary symptom of a variety of skeletal muscle diseases, including muscular dystrophy and inflammatory myopathy.