Below, you’ll find must-know information about spinal muscular atrophy (SMA).
Spinal muscular atrophy or SMA is a rare, hereditary condition that affects nerves and muscles and causes gradual muscle wasting.
This debilitating condition primarily affects infants and children. However, adults can get it as well.
Spinal muscular atrophy affects between 10,000 and 25,000 children and adults in the United States. Approximately one in every 10,000 children is affected by this rare illness.
Depending on the type of spinal muscular atrophy, the prognosis may vary. Multiple types of spinal muscular atrophy are dangerous and fatal if left untreated.
People with spinal muscular atrophy may appear stable for a lengthy period of time, but progression should not be expected without treatment.
A person with spinal muscular atrophy may have difficulty regulating head movement, walking, and standing. In severe cases, the person experiences difficulty breathing and swallowing.
Some types of spinal muscular atrophy are present at birth, while others appear later in adulthood. Certain characteristics affect life expectancy.
Spinal muscular atrophy is classified as type 1, type 2, type 3, or type 4, depending on the age of onset. Type 1 is the most common and severe form of SMA. Type 2 is an intermediate form while type 3 is a milder form. Type 4 is very rare.
The vast majority of SMA cases are progressive, meaning that symptoms worsen as opposed to improving.
The later the symptoms show up, the better the prognosis for motor function. The symptoms of spinal muscular atrophy resemble those of several other muscle diseases.
To determine if a patient’s muscle wasting is due to spinal muscular atrophy, the physician may perform genetic testing, electromyography, or a muscle biopsy.
Here are the various critical SMA symptoms and signs you should be aware about.
7. Difficulty In Swallowing Food
Dysphagia is a symptom of spinal muscular atrophy caused by muscle weakness in the throat and mouth. It is defined as difficulty or discomfort swallowing beverages, meals, or saliva. Hence, consuming sufficient calories and water makes it hard for the patient.
Since spinal muscular atrophy damages bulbar motor neurons, it affects eating, speaking, and swallowing. It also causes fasciculations, also known as tongue quivering.
6. Numbness In The Arms And Legs
Another symptom of spinal muscular atrophy is numbness or tingling in the arms and legs. This is brought about by the thinning and wasting of muscle mass, which is caused by either neurogenic disorders or a lack of muscle activity.
The muscles are unable to receive signals from the brain due to spinal muscular atrophy. The muscles deteriorate and weaken with time. It affects the muscles in the arms and legs, which explains why there is numbness in the said areas.
5. Inability To Walk Or Stand
Another symptom of spinal muscular atrophy is the inability to walk or stand. This occurs when the muscles get weakened.
The motor neurons, which are the nerve cells that control voluntary muscle movement, are affected.
Since the muscles cannot respond to nerve impulses, the person ends up inactive, causing the muscles to weaken and contract.
4. Hypotonia-Diminished Muscle Tone
A common symptom of spinal muscular atrophy in children is hypotonia-diminished muscle tone. The affected child has a weak muscle tone.
Muscle tone allows the body to respond to force. It enables the child to sit upright and move his or her arms and legs. Muscle tone also assists in controlling how the body’s organs work.
With weak muscle tone, the arms and legs lack strength and appear as if they are drooping.
3. Involuntary Contractions Or Twitching Of Muscles
Another symptom of spinal muscular atrophy is a condition known as spasticity. This is characterized by uncontrolled muscle spasms or contractions. Spasticity may be excruciatingly painful, and it can be challenging to get a muscle that is spasming to relax.
Spinal muscular atrophy can lower motor neurons in the spinal cord. The spasticity that a person with spinal muscular atrophy experiences is the result of muscles that are not being controlled by motor neurons.
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