Quick Answer
Parkinson's disease is diagnosed clinically from slowness of movement combined with tremor, stiffness or balance change, not by a scan. Essential tremor is a separate and commoner condition frequently mistaken for it. CNS evaluates and manages adult movement disorders across Las Vegas and Henderson, including follow-up for implanted stimulators.
Key Takeaways
- The distinction that matters most is between essential tremor and Parkinson's disease. Essential tremor appears when the hands are doing something; the Parkinson's tremor appears when they are at rest, and that single observation separates them more reliably than any test.
- Parkinson's is a clinical diagnosis. There is no blood test and no scan that establishes it, which means the examination and the response to treatment carry the weight, and a confident diagnosis sometimes takes more than one appointment.
- Slowness rather than tremor is the defining feature. Around a fifth of people with Parkinson's never develop a prominent tremor at all, and expecting one delays diagnosis in exactly those patients.
- The non-movement symptoms often precede the movement ones by years. Loss of smell, constipation, acting out dreams during sleep, and mood change are recognised early features and are frequently the ones that most affect daily life later.
- Where medication no longer controls symptoms adequately, some patients have a deep brain stimulation device implanted at a surgical centre. CNS manages and adjusts those devices afterwards but does not implant them.
01 — OverviewTremor first, because that is where most confusion sits
Most patients arriving with a movement concern arrive because of a tremor, and most of them are worried it means Parkinson’s. Frequently it does not. Separating the two conditions is the first job and it is usually achievable at the bedside. This page sits within the wider neurological conditions library at Clinical Neurology Specialists.
When the tremor happens is the key observation
Essential tremor appears when the hands are doing something: holding a cup, writing, bringing a spoon to the mouth. It settles when the hands rest in the lap. The Parkinson’s tremor does the opposite, appearing at rest and often easing when the hand is used. Patients frequently notice this themselves once asked directly, and it separates the two conditions more reliably than any investigation. Essential tremor is also considerably more common than Parkinson’s disease, which is worth saying because the assumption usually runs the other way.
The other distinguishing features
Essential tremor is typically symmetrical, often affects the head or voice, frequently runs in families, and improves temporarily with a small amount of alcohol. The Parkinson’s tremor usually begins on one side and stays asymmetrical, does not affect the voice in the same way, and is accompanied by slowness. Neither pattern is absolute, and where the picture is genuinely unclear the response to treatment over time frequently settles it.
| Feature | Essential tremor | Parkinson’s tremor |
|---|---|---|
| When it appears | When the hands are in use | At rest, often easing with use |
| Symmetry | Usually both sides | Usually begins on one side |
| Head or voice involved | Frequently | Not in the same way |
| Family history | Common | Less often relevant |
| Accompanied by slowness | No | Yes, and slowness is required for diagnosis |
| Relative frequency | More common | Less common |
The tremors that are neither
An overactive thyroid produces tremor. So do several common medications, caffeine in quantity, alcohol withdrawal, and anxiety. Those are worth excluding early, because they are correctable and because a patient carrying a diagnosis of essential tremor for years while taking a medication that caused it has been failed by an incomplete assessment. The National Institute of Neurological Disorders and Stroke catalogues these as distinct entities.
Parkinson’s disease is a progressive condition in which cells producing dopamine in a specific region of the brain are lost, producing slowness of movement together with tremor, stiffness or impaired balance, and it is diagnosed by examination rather than by any single test.
02How Parkinson's is actually diagnosed
There is no test. That surprises people, and it changes what a diagnostic appointment consists of: examination, history and time, rather than an investigation with a result.
Slowness of movement
Bradykinesia, meaning movements that are slower and smaller than they should be, and which decrease further with repetition. This must be present; the diagnosis cannot be made without it.
Tremor, stiffness or balance change
At least one of a rest tremor, muscular rigidity, or impaired postural stability alongside the slowness.
Asymmetry and treatment response
Beginning on one side, and a clear response to dopaminergic treatment, both strongly support the diagnosis where present.
Why a fifth of patients are diagnosed late
Because tremor is the feature everyone expects and a substantial minority never develop a prominent one. Those patients present instead with a dragging leg, reduced arm swing, smaller handwriting, a quieter voice, reduced facial expression, or a vague sense of slowing that gets attributed to age. Any of those, particularly if asymmetrical, deserves an examination rather than reassurance.
What imaging does and does not contribute
A standard scan cannot diagnose Parkinson’s. Imaging is used to exclude other explanations, particularly small-vessel disease that can produce a similar gait, and it is coordinated with an outside facility since the practice operates no imaging suite. Specialised dopamine-transporter imaging exists and can help in genuinely ambiguous cases, where it is arranged externally, but it is not a routine step and is not needed in most patients.
The conditions that mimic it
Several conditions produce slowness and stiffness without being Parkinson’s disease, including medication-induced parkinsonism from certain antipsychotics and anti-nausea drugs, small-vessel disease, and a group of less common degenerative conditions with a different course. Distinguishing them matters because treatment response differs substantially, and a poor response to standard treatment is itself diagnostic information rather than a treatment failure.
Worried a tremor means Parkinson's?
When the tremor happens, at rest or in use, separates the two commonest causes more reliably than any test.
03The symptoms nobody expects, and which often come first
Parkinson’s is treated as a movement disorder and experienced as considerably more than one. Several non-movement features precede the motor symptoms by years, and several matter more to daily life than the tremor ever does.
The early ones
Loss of smell, often for years beforehand and usually unnoticed until asked. Constipation, which is common and easy to attribute to something else. Acting out dreams during sleep, sometimes vigorously enough to injure a bed partner, which is a recognised early feature worth mentioning to a clinician rather than tolerating. And mood change, particularly anxiety and depression, which can precede any motor sign.
The ones that matter later
Fatigue. Sleep fragmentation. Bladder urgency. Reduced blood pressure on standing, which causes light-headedness and falls and is directly treatable. Pain and stiffness. Cognitive change in some patients, described on the cognitive assessment page. Speech becoming quiet and difficult to follow. Swallowing difficulty. Each of these has its own management, and none of them is addressed simply by adjusting dopaminergic medication.
Why raising them is the patient’s job and should not be
Appointments naturally centre on the visible symptoms, which means the invisible ones go unmentioned unless someone asks. A patient whose tremor is well controlled and who has stopped leaving the house because of urgency and light-headedness is not well managed, however good the movement examination looks. Asking about the whole list is part of a competent review, and the Michael J. Fox Foundation publishes patient material covering the full picture.
Falls, which is the risk that changes lives fastest
Impaired balance, freezing of gait, and low blood pressure on standing combine to make falls the single most consequential complication for many patients. Addressing them involves medication review, physiotherapy directed specifically at gait and balance, home hazard assessment, and treating the blood pressure component. It is more productive than it sounds and it is frequently left until after the first serious fall.
04Treatment, and what this practice provides
Treatment addresses symptoms rather than the underlying process, and it is genuinely effective for many years in most patients. Being clear about both halves of that is more useful than either alone.
Medication, and the timing question
Dopaminergic treatment replaces or mimics the dopamine that is lost, and the response is often substantial. When to start is a real decision rather than automatic, weighed against symptoms, function, work and individual preference. Over years the pattern of response changes, with periods of good control alternating with periods where symptoms return, and managing that pattern is much of what long-term care consists of. Adjusting timing and combinations is normal rather than evidence of decline.
What else contributes as much as medication
Exercise, which is one of the few interventions with meaningful evidence in this condition and is not a lifestyle suggestion offered in place of treatment. Physiotherapy directed at gait, balance and freezing. Speech and language therapy for voice and swallowing, which is under-used. Occupational therapy for daily function. Treating sleep, mood and blood pressure. A plan consisting only of tablets is an incomplete plan.
Device therapy, and precisely what CNS does
Where medication no longer provides adequate control, some patients have a deep brain stimulation device implanted. Implantation is neurosurgical and performed at a surgical centre. CNS manages and follows up those devices afterwards, including programming adjustments, in coordination with the implanting centre. The practice does not perform the surgery and says so rather than implying otherwise. The same arrangement applies to vagus nerve stimulators, described on the epilepsy page.
What is not promised
No reversal of the condition, no halting of progression, and no timeline. Treatment controls symptoms, often well and often for a long time, and it does not change the underlying process. A practice suggesting otherwise is describing hope rather than medicine. What is offered is accurate diagnosis, treatment adjusted as the condition changes, attention to the non-movement symptoms, and follow-up over years. Options the practice manages are on the treatments hub.
05Living with it, and the decisions that arrive
The questions that follow a diagnosis are mostly practical, and answering them properly is part of the clinical work rather than adjacent to it.
Driving
Many people continue driving for years after diagnosis. The relevant factors are reaction time, movement control, vision, and cognition rather than the diagnosis itself, and where there is doubt formal assessment is available. Raising it early while the answer is straightforward is easier than raising it after an incident, and it is a conversation the practice will start.
Work and disclosure
A personal decision in most circumstances rather than an obligation. Many roles are unaffected for a long period, and where symptoms do affect performance, adjustments are often less drastic than people fear. As with other chronic neurological conditions, deciding in the first weeks after a diagnosis is rarely the best timing.
Exercise, treated as treatment
Worth restating because it is so often heard as generic advice. Regular vigorous exercise has better evidence in Parkinson’s disease than in most neurological conditions, and it is prescribed here in the same spirit as medication rather than mentioned in passing. Boxing-style programmes, dance, cycling and treadmill work all appear in the evidence, and the useful principle is intensity and consistency rather than any particular activity.
Family, and what they carry
Partners frequently notice changes before patients do and frequently carry consequences the appointment does not address: sleep disrupted by dream enactment, anxiety about falls, and the gradual redistribution of household tasks. Their observations are clinically valuable and their strain is a clinical issue. Bringing someone to appointments improves the information available and is encouraged rather than merely permitted.
06Parkinson's care across Southern Nevada
Both CNS offices manage movement disorders, so appointments happen at whichever address is the shorter drive. For a condition needing review several times a year across many years, that difference compounds substantially.
Parkinsons Henderson NV and Green Valley
Patients seeking parkinsons Henderson NV care attend the West Horizon Ridge Parkway office, just off the 215 Beltway. Parkinsons Green Valley Henderson residents almost always find that address closest, and the local guide is the movement disorder specialist guide.
Parkinsons Las Vegas and Summerlin
Parkinsons Las Vegas and parkinsons Summerlin patients generally attend West Flamingo Road, which the 215 and Summerlin Parkway feed toward. Consultation, medication management and device follow-up are all handled there.
Parkinsons Southern Nevada: mobility and the appointment itself
Parkinsons Southern Nevada patients face a practical consideration specific to this condition. Freezing of gait, fatigue and low blood pressure on standing make a long journey and a long walk from a car park genuinely difficult, and a patient who arrives exhausted examines worse than they actually are. Choosing the closer office is therefore clinically relevant rather than merely convenient, and telling us about mobility needs at booking lets the appointment be arranged around them.
Why continuity matters here specifically
Parkinson’s changes slowly, which means the useful comparison is against your own examination a year ago rather than against a textbook. Medication adjustments make sense against a record of what has already been tried and at what dose. A device setting is adjusted against its own history. And the non-movement symptoms only get tracked if someone is asking about them consistently. None of that survives repeatedly changing practices, and it is the strongest argument for choosing somewhere you can stay. Coverage is verified before appointments, with detail on the insurance page, and specialist supply across the valley is thin relative to population, consistent with what the American Academy of Neurology has documented nationally.
Movement Disorder Guides
7 in-depth guidesThis hub covers Parkinson's disease and tremor at CNS. The guides below cover the specialist pathway at each office, the conditions movement symptoms overlap with, and the assessments that address the non-movement features. Start with the guide matching what has already been said to you.
Start Here — Cornerstone Guides
Movement disorder specialist care
What a specialist assessment establishes that a general one may not.
Read the guide → OverlapRestless legs syndrome
A movement symptom that occurs more often alongside Parkinson’s than by chance.
Read more → Non-movementCognitive assessment
Cognitive change in movement disorders, assessed properly rather than assumed.
Read more →Browse by Category
The specialist pathway
Overlapping conditions
The non-movement features
Treatment and devices
Five board-certified physicians
Leo Germin, M.D., FAANEM, founder and medical director, triple board-certified in Neurology and Vascular Neurology through the ABPN and Neuromuscular Medicine through the ABEM, with subspecialty certification in Neurosonology and Neuroimaging. Anup Panduranga, M.D., fellowship-trained in epilepsy. Eric Gutglueck, M.D., neuromuscular medicine and neuromuscular ultrasound. Jessica A. Knirk, M.D., general adult neurology with Botox for chronic migraine. William Lujan, M.D., broad general adult neurology.
Four advanced practice providers
Fara Tan, APRN, MSCN, a Multiple Sclerosis Certified Nurse through the Multiple Sclerosis Nurses International Certification Board. Lindsey Evans, PA-C, general neurology and electromyography. Terra Fonseca, PA-C, a surgical and vascular background applied to general adult neurology. Alissa Nakamura, PA-C, board-certified through the NCCPA, with three years in pain management that transfer directly to nerve-injury and neuropathy questions.
Spread, not headcount
A referral that lands somewhere without neuromuscular or epilepsy depth often becomes a second referral, and each handoff adds weeks. Here an ambiguous nerve study can be reviewed by a neuromuscular specialist and an ambiguous EEG by a fellowship-trained epileptologist without the patient leaving the practice. Full biographies are on the providers page.
The Bottom Line
Ask when the tremor happens, not just whether you have one. Essential tremor appears in use and the Parkinson's tremor appears at rest, and that single distinction separates the two commonest causes before any investigation.
Frequently Asked Questions
How do I know whether my tremor is Parkinson's or essential tremor?
Largely from when it happens. Essential tremor appears when the hands are doing something and settles at rest; the Parkinson's tremor appears at rest and often eases with use. Essential tremor is also considerably more common, is often symmetrical, may affect the head or voice, and frequently runs in families.
Is there a test for Parkinson's disease?
No single test establishes it. The diagnosis is clinical, requiring slowness of movement plus at least one of rest tremor, stiffness or impaired balance. Imaging is used to exclude other explanations rather than to confirm it, and specialised dopamine-transporter imaging is reserved for genuinely ambiguous cases.
Can you have Parkinson's without a tremor?
Yes, and around a fifth of patients never develop a prominent one. Those patients present instead with a dragging leg, reduced arm swing, smaller handwriting, a quieter voice, reduced facial expression or unexplained slowing. Expecting a tremor is a common reason diagnosis is delayed.
What are the earliest signs?
Several non-movement features often precede the motor symptoms by years: loss of smell, constipation, acting out dreams during sleep, and mood change including anxiety and depression. Acting out dreams vigorously enough to disturb or injure a bed partner is worth mentioning to a clinician rather than tolerating.
Does CNS implant deep brain stimulation devices?
No. Implantation is neurosurgical and performed at a surgical centre. CNS manages and follows up those devices afterwards, including programming adjustments, in coordination with the centre that implanted them.
Is exercise actually treatment or just general advice?
It is treatment. Regular vigorous exercise has better evidence in Parkinson’s disease than in most neurological conditions, and it is prescribed here in the same spirit as medication. Intensity and consistency matter more than the particular activity.
Can I keep driving?
Many people do, for years. The relevant factors are reaction time, movement control, vision and cognition rather than the diagnosis itself, and formal assessment is available where there is doubt. Raising it early, while the answer is straightforward, is easier than after an incident.
My tremor is controlled but I feel worse overall. Why?
Because the symptoms affecting daily life most are frequently the non-movement ones: fatigue, sleep fragmentation, bladder urgency, low blood pressure on standing, pain and mood. None of those is addressed by adjusting dopaminergic medication, and each has its own management.
How this page was sourced
Practice facts here come from Clinical Neurology Specialists directly: that both offices manage movement disorders, that implanted stimulator follow-up and programming are provided in coordination with the implanting centre while the surgery is not performed here, and that no imaging suite is operated on site. Clinical context is sourced to the organisations below.
No prevalence figures, progression timelines or treatment response rates appear on this page, because they vary substantially between individuals. The statement that around a fifth of patients never develop a prominent tremor reflects established clinical teaching and is included because expecting a tremor delays diagnosis in exactly those patients. Scope is adults 18 and older, medical rather than surgical.
References
- The Michael J. Fox Foundation — patient information and research resources on Parkinson's disease.
- National Institute of Neurological Disorders and Stroke — the reference catalogue of nervous-system disorders.
- American Academy of Neurology — clinical practice guidance and specialist supply.
This page is for general education about adult neurological care and is not medical advice, a diagnosis, or a treatment recommendation. It does not create a physician-patient relationship. Adults 18 and older. For an active stroke, a first-time or prolonged seizure, sudden severe headache, sudden weakness, sudden vision loss, or a head injury with loss of consciousness, call 911 or go to the nearest emergency department. Speak with a qualified clinician about your own circumstances.