What Is Parkinson's Disease?

Parkinson's disease is a progressive nervous system condition in which the brain becomes gradually damaged over time. Early symptoms are often mild and barely noticeable, but as the disease progresses it can start to interfere with basic daily tasks. Common motor symptoms include muscle stiffness and slowed movement, and over time non-motor symptoms often appear as well, including sleep problems, depression, anxiety, and fatigue.

An older couple walks in a park in the autumn

Parkinson's affects movement, including the muscles for speech and swallowing.

Symptoms of Parkinson's Disease

Symptoms vary quite a bit from person to person. Early signs can go unnoticed, and symptoms often start on one side of the body before eventually affecting both sides, though usually remaining more severe on the side where they began. Here are a few of the most common signs:

Tremors — often one of the earliest signs, typically starting in the fingers or hand, sometimes with an urge to rub the thumb and forefinger together, or trembling even while the hand is at rest
Slowed movement — basic tasks start taking noticeably longer, walking strides shorten, and getting out of a chair or starting to walk can become difficult, sometimes with a shuffling gait
Impaired balance and posture — balance problems are common, and posture can become stooped in more advanced cases
Rigid muscles — stiffness in various parts of the body, which can cause painful muscle pulls and limit range of motion
Speech difficulties — reduced muscle activity can lead to quick, soft, slurred, or hesitant speech, often flattening into a more monotone quality
Difficulty swallowing — chewing, eating, and swallowing can all become harder, carrying a real choking risk that swallowing therapy can help address
Loss of automatic movement — reduced ability to perform unconscious movements like smiling, blinking, or swinging the arms while walking
Difficulty writing — handwriting can shrink and become hard to read, even with reading glasses on

Why Parkinson's Affects Speech and Swallowing

Parkinson's affects the muscles and nerves that control speech, touching the throat, larynx, facial muscles, respiratory muscles, tongue, lips, and the parts of the brain that handle speech processing and hearing — much the same way it affects mobility elsewhere in the body. It can also produce a "masked" or frozen facial expression, which sometimes gets misread by others as aloofness or disinterest, even though that's not what's happening. Some patients struggle to find the right words or speak very slowly, while others speak faster than usual, which can come across as a stammer.

Parkinson's can also affect safe eating and drinking. Dysphagia is a common symptom, and signs like difficulty with solid textures, choking during meals, or coughing while eating or drinking are worth bringing to a medical professional's attention, since swallowing problems carry real risks including aspiration pneumonia.

A doctor talks with an older woman in a friendly exam room

Speech and swallowing changes are part of the picture.

Speech and Voice Difficulties You May Experience

Parkinson's can affect speech in a number of ways, and it's common not to notice the change yourself at first — it often starts as a shift in voice quality that gradually worsens.

Speaking in a monotone, with little pitch variation
A softened voice, often at a noticeably lower volume
A strained or hoarse voice quality
Running out of breath while speaking, sometimes noticeable to listeners as breathiness
Slurring or stammering
A tremor in the voice
Reduced facial expression while speaking

Treatment for These Symptoms

While medication can help stimulate dopamine production, speech therapy remains the primary treatment for Parkinson's-related speech changes. We teach exercises and techniques to improve volume and clarity, along with memory-building exercises for patients experiencing cognitive changes alongside their motor symptoms.

Medication can also help with swallowing difficulties, but swallowing therapy remains the leading treatment. We recommend exercises that strengthen the muscles used in swallowing, along with behavioral adjustments like tucking the chin toward the chest while swallowing, avoiding straws, and taking smaller bites. In more severe cases where adequate nutrition becomes hard to maintain, a feeding tube may be raised as an option — understandably a difficult conversation for a family, but sometimes the best way to ensure a patient gets enough calories.

A speech-language pathologist coaches an older man to tuck his chin while sipping water

Swallowing therapy builds safe, comfortable habits.

How Speech Therapy Can Help

Therapy generally looks different at different stages of Parkinson's. Early on, we focus on strategies for voice volume, breathing, speaking pace, clear pronunciation, and facial expression. As the disease progresses and communication becomes more difficult, we help patients adapt — sometimes recommending assistive devices like voice amplifiers or computer-based tools, and building non-verbal communication skills using expressions and gestures. That non-verbal training in particular can take real pressure off patients, making conversations with friends and family feel more relaxed rather than like a constant effort to be understood.

A man practices speaking loudly while a therapist holds a tablet showing his volume

Big, loud speech practice trains the voice.

Our Approach to Treatment

If you or a loved one is experiencing speech or swallowing difficulty related to Parkinson's disease, it's worth reaching out sooner rather than later. Our therapists provide the support and strategies needed to keep communication as clear and comfortable as possible, for as long as possible.

A woman laughs as she does a big-voice exercise with her therapist

Therapy built around what you want to do.

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Parkinson's Disease