Disease Description (Causes and Symptoms)
- Definition summary: Progressive Supranuclear Palsy (PSP) is a type of atypical parkinsonian syndrome caused by degenerative changes in the brainstem, including the midbrain and basal ganglia, and in the subcortex.
- Causes and pathophysiology: The accumulation of abnormal tau protein and neurofibrillary degeneration are known to be primarily involved, but no definite single cause has been identified. Characteristic findings include damage to the upper midbrain (the nuclei that control vertical eye movements), the basal ganglia, substantia nigra, and hypothalamus.
- Main symptoms
- Gaze abnormalities: Particularly vertical gaze palsy (difficulty looking down or up) and reduced blinking
- Gait disturbance and postural instability: Frequent falls from the early stages (including backward falls), and a drunken-looking, centrally unstable gait
- Axial rigidity (centered on the neck and trunk): Such as a posture in which the head is tilted backward (retrocollis)
- Speech and swallowing disorders: Slurred or unclear speech (dysarthria) and difficulty swallowing (dysphagia)
- Cognitive and behavioral changes: Impaired executive function, apathy and depression, personality changes, and a tendency toward dementia
- Sleep disorders, blurred vision, and other associated symptoms
Treatment Methods
- Definitive treatment: To date, there is no established treatment that can fundamentally stop or reverse disease progression (tau-targeted treatments are under investigation).
- Drug treatment
- Dopaminergic drugs (such as levodopa): Some patients may experience temporary and partial improvement, but the response rate is low and sustained effects are limited.
- Symptomatic medications: Antidepressants and other medications may be used if symptoms of depression or anxiety are present. Medications may be adjusted according to accompanying symptoms such as orthostatic hypotension and sleep disorders.
- Non-pharmacological and conservative treatment
- Physical therapy (balance and gait training), occupational therapy, and walking aids (canes, walkers, etc.)
- Speech therapy (speech and swallowing correction) and swallowing rehabilitation (swallowing exercises and dietary adjustment)
- Botulinum toxin: May be used to relieve symptoms of eyelid spasms (blepharospasm) or stiffness in specific muscles
- Nutritional management: In cases of severe dysphagia, a videofluoroscopic swallowing study (VFSS) should be performed, followed by consideration of gastrostomy (PEG) if necessary
- Surgical treatment
- Deep brain stimulation (DBS) is generally ineffective in PSP (not recommended).
- Complication management and considerations
- Attention should be paid to complications such as falls and fractures, aspiration pneumonia, malnutrition, and obstructive infections.
- In the terminal stage, respiratory, nutritional, and infection management, as well as palliative care (hospice and decisions regarding life-sustaining treatment), should be considered.
- Self-management and precautions
- Prevent falls (organize the home, use non-slip measures and assistive devices), and take care when swallowing food (eat slowly and swallowing exercises are recommended).
- Consult a doctor when taking prescription or OTC medications (for orthostatic hypotension, drug interactions, etc.).
- Regular reassessment is recommended (imaging, neurocognitive, and swallowing function tests).
Checklist Before an Outpatient Visit (Including Example Questions)
- Items and information to prepare
- A list of all medications currently being taken (including prescription, nonprescription, and supplements)
- Previous test results (recent MRI, SPECT/PET, swallowing test results, etc.) and imaging CDs or reports
- The timing and course of symptom onset (when and which symptoms began), and records of the frequency and circumstances of falls
- Specific examples of swallowing problems, weight changes, and changes in speech or voice
- Records of observed cognitive and behavioral changes (including opinions from family members or caregivers)
- Living environment (whether living alone, whether driving, home layout, etc.)
- Items to show the medical staff during the outpatient visit
- Recent imaging tests (the original images or radiology report, if possible)
- Photos or notes related to falls (including details of injuries)
- Includes useful example questions for the outpatient visit
- "How might this medication (or combination of medications) affect my symptoms?"
- "What improvements to my indoor environment are needed to reduce the risk of falls?"
Examples of General Questions to Ask the Doctor
- What is the current rate of progression and the long-term prognosis of this disease?
- What are the main side effects of the medication I am currently taking (or will be prescribed)?
- How often and for how long should I receive rehabilitation treatments such as physical, speech, and occupational therapy?
- If difficulty swallowing worsens, when should gastrostomy (PEG) be considered?
- I have a high risk of falling; what safety measures are needed at home?
- When is a good time to begin discussions about end-of-life care or hospice?
Examples of Disease-Specific Questions
- Is a trial of levodopa (or another dopaminergic drug) recommended? What are the criteria for deciding to stop it if it is ineffective?
- My recent MRI report states that there is "midbrain atrophy" (or a hummingbird sign). What does this finding mean for my diagnosis and prognosis?
- My vertical gaze palsy, particularly difficulty looking down, is severe. What conservative or procedural options related to eye function (for example, botulinum toxin) are available, and what degree of benefit can be expected?
If needed, you can upload the test results currently available (MRI, SPECT/PET, swallowing tests, etc.), and we can provide more specific explanations and help prepare an outpatient visit checklist.