Does ARSACS Cause Swallowing, Speech, or Breathing Issues?

As ARSACS progresses over the years and decades, it can eventually cause problems with swallowing, speech, and—by extension—breathing. While the disease is well known for causing clumsiness and stiffness in the arms and legs, the same gradual loss of muscle coordination and nerve function can slowly begin to affect the muscles in your throat, mouth, and chest ^[1][2]. Although life expectancy with ARSACS is often near-normal and these complications typically appear in the later stages of the disease, understanding them now allows you to seek proactive care to protect your health and quality of life.

Changes to Speech (Dysarthria)

Many people with ARSACS eventually develop a condition called dysarthria, which means difficulty coordinating the muscles used for speaking. Research shows that speech in ARSACS often becomes slower, with longer pauses between words ^[3]. You might also notice that your voice cracks or breaks in pitch, and words may sound slurred or less crisp than they used to ^[3]. These changes happen because the nerves gradually struggle to send precise signals to the lips, tongue, and vocal cords.

Swallowing Difficulties (Dysphagia)

Just as speech requires precise muscle timing, so does swallowing. ARSACS can cause dysphagia, or difficulty swallowing safely. Studies have found that the swallowing reflex in ARSACS can be delayed, meaning the safety flap that protects your airway (the epiglottis) closes too late ^[3].

Because of this delayed reflex, many patients report regular coughing or choking during mealtimes, especially when drinking thin liquids like water or juice ^[3]. In fact, one study using special X-ray imaging found that about 40% of people with ARSACS accidentally inhale thin liquids into their airway ^[3].

Note: You do not need to rush out for an imaging study if you are newly diagnosed. Doctors typically order these tests later on, only if you start noticing early warning signs like frequent throat clearing, coughing while drinking, or taking much longer to finish a meal.

The Risk of Aspiration Pneumonia

When food, liquid, or saliva slips past the vocal cords and into the lungs, it is called aspiration ^[4]. This is a major concern because it can lead to aspiration pneumonia, a serious and potentially life-threatening lung infection ^[5]. While ARSACS primarily targets the nervous system and muscles rather than the lung tissue itself, the combination of swallowing difficulties and generalized motor impairment makes aspiration pneumonia one of the most significant respiratory complications to watch for ^[6][7].

Warning Signs of Aspiration Pneumonia

Seek immediate emergency medical attention if you experience:

• Unexplained fever or chills
• Sudden shortness of breath or difficulty breathing
• Chest pain, especially when taking a deep breath
• A new, productive cough with foul-smelling or discolored mucus

Protecting Your Airway: The Role of an SLP

Because swallowing problems develop gradually, they often go unnoticed. Working with a Speech-Language Pathologist (SLP) is one of the most important steps you can take to prevent respiratory complications ^[4].

An SLP can regularly screen your swallowing function and recommend practical strategies to keep your airway safe. These strategies may include:

• Tucking your chin while swallowing to help close the airway
• Thickening thin liquids (using over-the-counter thickeners available at most pharmacies) so they move more slowly and give your body time to react ^[8][5]
• Practicing specific exercises to strengthen the muscles of the mouth and throat
• Adjusting the texture of your food to make it easier to swallow safely

Important Safety Warning: Never attempt these strategies—such as using thickeners or changing your head position—on your own without a personalized evaluation by an SLP. Doing them incorrectly or for the wrong type of swallowing problem can actually increase your risk of aspiration and make pneumonia more severe.

Consider inviting a family member or caregiver to your SLP appointments. Since they often help prepare meals, it is vital they understand safe feeding techniques and emergency choking procedures. Even if you aren’t currently experiencing choking or coughing, establishing a relationship with an SLP early on ensures you have a baseline and can monitor for any slow changes over time.