α-Syn One Test
Plain-English: A skin biopsy test that looks for abnormal Parkinson’s protein.
Clinical Note: Detects phosphorylated alpha-synuclein in cutaneous nerve fibers.
Why It Matters: Provides biological confirmation of Parkinson’s and related disorders. Amantadine
Amantadine
Plain-English: A medication that helps calm dyskinesias and sometimes improves slowness.
Clinical Note: Works through glutamate modulation and dopaminergic effects.
Why It Matters: Main non-surgical treatment for levodopa-induced dyskinesias.
Apathy (Parkinson’s Related)
Plain-English: “I know what I should do, I just can’t get myself to start.”
Clinical Note: A motivational deficit linked to dopamine and frontal-striatal circuitry.
Why It Matters: Often mistaken for depression but treated differently.
Ataxia
Plain-English: Coordination problems — movements become shaky, inaccurate, or unstable.
Clinical Note: Indicates cerebellar dysfunction; not typical of PD.
Why It Matters: Prominent ataxia should prompt evaluation for MSA-C, stroke, POLG-related disease, or cerebellar disorders.
Autonomic Dysfunction
Plain-English: Problems with automatic body functions like blood pressure, digestion, sweating, and heart rate.
Clinical Note: Caused by degeneration of autonomic nervous system pathways in Parkinson’s.
Why It Matters: A major driver of non-motor symptoms and quality-of-life decline.
Autonomic Testing
Plain-English: Tests that measure how well the body controls blood pressure, heart rate, and sweating.
Clinical Note: Evaluates autonomic nervous system function, which can be impaired in Parkinson’s and atypical syndromes.
Why It Matters: Helps distinguish PD from disorders like MSA and explains symptoms like dizziness and fainting.
Atypical Parkinsonism
Plain-English: Conditions that resemble Parkinson’s but follow a different pattern and progression.
Clinical Note: Includes disorders like MSA, PSP, and corticobasal syndrome; often respond less well to levodopa.
Why It Matters: Recognizing atypical features early improves planning and prevents misdiagnosis.
Basal Ganglia
Plain-English: The brain’s movement-control network.
Clinical Note: Dopamine depletion here disrupts motor planning and execution.
Why It Matters: Where PD’s motor symptoms originate.
Biomarker
Plain-English: A measurable sign in the body that gives information about a disease and how it behaves.
Clinical Note: Biomarkers can include proteins, genes, imaging findings, or physiologic measurements reflecting disease biology.
Why It Matters: Improves diagnosis, tracks progression, guides treatment decisions, and accelerates clinical trials.
Blepharospasm
Plain-English: Involuntary squeezing or closing of the eyes.
Clinical Note: A focal dystonia affecting orbicularis oculi muscles.
Why It Matters: Can interfere with reading, driving, and quality of life.
Bradykinesia
Plain-English: Slowed, small, effortful movement.
Clinical Note: Required for diagnosis; reflects dopamine loss in basal ganglia circuits.
Why It Matters: The most universal motor symptom in PD.
Bradyphrenia
Plain-English: Slowed thinking or mental processing.
Clinical Note: Linked to cortical-subcortical disconnection and dopaminergic deficits.
Why It Matters: Affects multitasking, planning, and decision-making.
Camptocormia
Plain-English: A strong forward bend at the waist when standing or walking.
Clinical Note: Axial dystonia or myopathy; straightens when lying down.
Why It Matters: Can be disabling and is not always medication-responsive.
Carbidopa-Levodopa
Plain-English: The gold-standard PD medication combination.
Clinical Note: Levodopa converts to dopamine; carbidopa prevents premature breakdown.
Why It Matters: Most effective treatment for slowness, stiffness, and tremor.
Clinical Trials
Plain-English: Research studies that test treatments or approaches in people to see if they are safe and effective.
Clinical Note: Trials follow phases that move from safety testing to effectiveness and long-term monitoring.
Why It Matters: Clinical trials are how new Parkinson’s therapies are discovered, tested, and approved.
Clinical Trial Phases
Plain-English: The step-by-step stages researchers use to test a treatment safely.
Clinical Note: Phase I: Safety, dosing, side-effect identification. Phase II: Early effectiveness and dose refinement. Phase III: Large, controlled trials for approval. Phase IV: Post-FDA approval safety and real-world use.
Why It Matters: Explains why treatments take time and why results may change between phases.
Cognitive Impairment
Plain-English: Trouble with memory, planning, attention, or multitasking.
Clinical Note: Often begins with executive dysfunction; may progress to Parkinson’s disease dementia.
Why It Matters: One of the biggest quality-of-life impacts for families.
COMT Inhibitors
Plain-English: Medications that help levodopa last longer in the body.
Clinical Note: Used to reduce wearing-off by slowing levodopa breakdown (e.g., entacapone, opicapone).
Why It Matters: Can increase “on” time and smooth out daily symptom swings.
Constipation
Plain-English: Slow or difficult bowel movements that don’t match normal patterns.
Clinical Note: Caused by autonomic dysfunction and slowed GI motility.
Why It Matters: Can worsen medication absorption and overall symptoms.
Corticobasal Syndrome (CBS)
Plain-English: A rare disorder that can cause stiffness, slowness, and coordination problems—often more on one side.
Clinical Note: Often includes apraxia and cortical signs; levodopa response is limited.
Why It Matters: Can look like Parkinson’s early but behaves differently and requires different planning.
CSF Dopamine Metabolites
Plain-English: Dopamine breakdown products measured in spinal fluid.
Clinical Note: Reflect dopamine neuron function and neurodegeneration.
Why It Matters: Helps confirm dopaminergic deficit and track disease biology.
Cueing Strategies
Plain-English: External prompts (beats, lines, tapping) that help movement work better.
Clinical Note: Engages alternate neural pathways to bypass impaired basal ganglia circuits.
Why It Matters: One of the best tools for freezing of gait.
DaTscan Imaging
Plain-English: A scan that shows dopamine activity in the brain.
Clinical Note: Measures dopamine transporter density in the striatum.
Why It Matters: Supports diagnosis when clinical findings are unclear.
Deep Brain Stimulation (DBS)
Plain-English: A surgically implanted “pacemaker for the brain” that reduces symptoms.
Clinical Note: Targets STN or GPi to modulate abnormal neuronal firing.
Why It Matters: Very effective for tremor, dyskinesia, and motor fluctuations.
Delusions
Plain-English: Strong false beliefs (often paranoia or spousal infidelity themes).
Clinical Note: Associated with PD dementia, medication effects, and Lewy pathology.
Why It Matters: A major safety and caregiver-burden issue.
Depression & Anxiety
Plain-English: Changes in mood that may arrive before motor symptoms.
Clinical Note: Partially driven by loss of dopamine, serotonin, and norepinephrine pathways.
Why It Matters: Highly treatable; not a personal weakness.
Dopamine Agonists
Plain-English: Parkinson’s medications that mimic dopamine in the brain.
Clinical Note: Includes pramipexole, ropinirole, and rotigotine; helpful but can cause notable side effects.
Why It Matters: Strongly linked to impulse control disorders and sleepiness, so monitoring is critical.
Dyskinesia
Plain-English: Uncontrolled, flowing, “wiggly” movements.
Clinical Note: Caused by long-term levodopa use and pulsatile dopamine stimulation.
Why It Matters: Not disease progression — a medication effect that can be managed.
Dysphagia
Plain-English: Difficulty swallowing food, liquids, or pills.
Clinical Note: Impaired coordination of swallowing muscles due to bradykinesia and rigidity.
Why It Matters: Increases choking and aspiration pneumonia risk.
Dystonia
Plain-English: Muscle contractions that twist a body part into an uncomfortable position.
Clinical Note: Often foot/toe dystonia in young-onset PD.
Why It Matters: Can be painful, disabling, and targetable with meds or botox.
Executive Dysfunction
Plain-English: Difficulty organizing, planning, or switching tasks.
Clinical Note: Frontostriatal circuitry involvement.
Why It Matters: Drives many daily-life frustrations.
Falls / Fall Risk
Plain-English: Increased chance of falling due to balance changes, freezing, or dizziness.
Clinical Note: Driven by postural instability, orthostatic hypotension, and gait impairment.
Why It Matters: Falls are a major preventable cause of injury and loss of independence.
Fatigue
Plain-English: Crushing low energy that isn’t the same as sleepiness.
Clinical Note: Multifactorial — dopamine loss, inflammation, sleep issues, autonomic changes.
Why It Matters: One of the least recognized but most disabling symptoms.
Freezing of Gait
Plain-English: Feet suddenly feel “superglued” to the floor.
Clinical Note: A motor block related to impaired gait initiation circuits.
Why It Matters: Major fall risk; responds well to cueing.
Freezing Triggers
Plain-English: Situations that make freezing more likely, such as doorways or crowds.
Clinical Note: Cognitive load and environmental factors worsen gait initiation failure.
Why It Matters: Identifying triggers helps prevent falls.
Gait Festination
Plain-English: Steps become shorter and faster, as if chasing balance.
Clinical Note: A gait abnormality caused by impaired postural control.
Why It Matters: Increases fall risk during walking.
Genetic Variants (LRRK2, GBA)
Plain-English: Genes that can increase the risk of PD.
Clinical Note: GBA variants often predict faster progression; LRRK2 is a common inherited cause.
Why It Matters: Critical for clinical trials and personalized medicine.
GPi (Globus Pallidus Internus)
Plain-English: A deep brain target sometimes used for DBS.
Clinical Note: GPi stimulation often helps dyskinesias and motor fluctuations.
Why It Matters: Helps patients understand DBS options and goals.
Hallucinations (Parkinson’s Related)
Plain-English: Seeing people, animals, or shadows that aren’t actually there.
Clinical Note: Visual hallucinations are more common than auditory in PD.
Why It Matters: Early recognition helps prevent crises.
Hoehn & Yahr Staging
Plain-English: A simple 1–5 scale for describing Parkinson’s severity.
Clinical Note: Based primarily on motor symptoms and balance.
Why It Matters: Useful for clinical tracking and communication.
Hyposmia / Anosmia
Plain-English: Reduced sense of smell (hyposmia) or loss of smell (anosmia).
Clinical Note: A common early non-motor symptom that can appear years before motor signs.
Why It Matters: Often overlooked, but one of the most frequent early clues of PD biology.
Hypomimia
Plain-English: Reduced facial expression — “masked” appearance.
Clinical Note: Caused by bradykinesia of facial musculature.
Why It Matters: May affect social perception and emotional communication.
Hypophonia
Plain-English: Soft, quiet, or monotone speech.
Clinical Note: Related to reduced respiratory drive and vocal intensity.
Why It Matters: Responds well to LSVT LOUD and speech therapy.
Impulse Control Disorders (ICDs)
Plain-English: Compulsive gambling, shopping, eating, or sexual behavior.
Clinical Note: Strongly associated with dopamine agonists.
Why It Matters: Important to identify early to prevent financial and social harm.
Inflammatory Markers
Plain-English: Blood markers associated with immune activation.
Clinical Note: Neuroinflammation is increasingly recognized as part of PD progression biology.
Why It Matters: Emerging targets for disease-modifying and neuroprotective therapies.
Levodopa
Plain-English: The backbone medication for PD symptoms.
Clinical Note: Crosses the blood–brain barrier and converts to dopamine.
Why It Matters: Most patients rely on it long-term.
Levodopa-Induced Dyskinesia (LID)
Plain-English: Involuntary movements caused by levodopa treatment over time.
Clinical Note: Related to pulsatile dopamine stimulation and disease stage.
Why It Matters: Manageable with timing changes, meds, or advanced therapies.
Lewy Bodies
Plain-English: Abnormal protein clumps inside neurons.
Clinical Note: Composed mainly of alpha-synuclein.
Why It Matters: Their distribution defines PD, PDD, and DLB.
MAO-B Inhibitors
Plain-English: Medications that help the brain keep dopamine active longer.
Clinical Note: Includes rasagiline, selegiline, and safinamide; used early or as add-on therapy.
Why It Matters: Can reduce wearing-off and support smoother symptom control.
Medication Wearing-Off
Plain-English: When Parkinson’s symptoms return before the next dose is due.
Clinical Note: Occurs as dopamine buffering capacity decreases over time.
Why It Matters: Signals need for medication adjustment or advanced therapies.
Micrographia
Plain-English: Very small or progressively shrinking handwriting.
Clinical Note: A manifestation of bradykinesia affecting fine motor control.
Why It Matters: Often an early and visible sign of Parkinson’s.
Mild Cognitive Impairment (PD-MCI)
Plain-English: Subtle thinking changes that are noticeable but not dementia.
Clinical Note: Often affects processing speed and executive function early.
Why It Matters: Helps families plan and supports early strategies for independence.
Motor Fluctuations
Plain-English: Ups and downs in symptom control across the day.
Clinical Note: Result from short levodopa half-life and loss of buffering capacity.
Why It Matters: Leads to “on,” “off,” and dyskinesia cycles.
Motor Symptoms
Plain-English: The movement-related symptoms of Parkinson’s—slowness, stiffness, tremor, and balance issues.
Clinical Note: Driven mainly by dopamine circuit dysfunction in the basal ganglia.
Why It Matters: The most visible symptoms, but not the whole disease.
Multidisciplinary Care
Plain-English: Care from a coordinated team of specialists.
Clinical Note: May include neurology, PT, OT, speech therapy, and more.
Why It Matters: Strongly associated with better outcomes and quality of life.
Multiple System Atrophy (MSA)
Plain-English: A Parkinson’s-like condition that strongly affects blood pressure, balance, and body functions.
Clinical Note: Often has prominent autonomic dysfunction and limited levodopa response.
Why It Matters: Early recognition changes prognosis, safety planning, and symptom priorities.
Neurofilament Light Chain (NfL)
Plain-English: A marker of nerve cell damage measured in blood or spinal fluid.
Clinical Note: Elevated levels may suggest faster neurodegeneration.
Why It Matters: Helps distinguish typical PD from atypical parkinsonism.
Neurogenic Orthostatic Hypotension (NOH)
Plain-English: Blood pressure drops when standing, causing dizziness.
Clinical Note: Caused by autonomic failure in PD.
Why It Matters: Treatable — and a major fall risk.
Neuroplasticity
Plain-English: The brain’s ability to adapt and rewire.
Clinical Note: Exercise and therapy leverage neuroplastic mechanisms in PD.
Why It Matters: Supports movement and learning as powerful tools for function.
Nocturia
Plain-English: Waking up multiple times at night to urinate.
Clinical Note: Common in PD due to autonomic dysfunction and sleep disruption.
Why It Matters: Drives fatigue, sleep fragmentation, and fall risk at night.
Non-Motor Symptoms
Plain-English: Everything PD affects besides movement.
Clinical Note: Includes autonomic, mood, sleep, sensory, GI, pain, and cognitive symptoms.
Why It Matters: Often more disabling than motor symptoms.
“Off” Time
Plain-English: When meds aren’t working and symptoms return.
Clinical Note: Pharmacokinetic and neurophysiologic wearing-off.
Why It Matters: Key driver of medication changes and DBS decisions.
Olfactory Testing
Plain-English: Smell testing.
Clinical Note: Reduced smell (hyposmia) is common early in PD.
Why It Matters: Helps identify risk before motor symptoms appear.
“On” Time
Plain-English: When medication is fully working and movement improves.
Clinical Note: Depends on absorption, dose, and disease stage.
Why It Matters: The goal is to maximize safe, comfortable “on” time.
On-Demand Therapy
Plain-English: Fast-acting treatments used during sudden “off” periods.
Clinical Note: Includes apomorphine and inhaled levodopa.
Why It Matters: Restores function during unpredictable off time.
Orthostatic Hypotension (OH)
Plain-English: A blood pressure drop when standing that causes dizziness or weakness.
Clinical Note: Can be neurogenic or worsened by dehydration and medications.
Why It Matters: Treatable and a major contributor to falls.
Orthostatic Intolerance
Plain-English: Feeling unwell when standing for long periods.
Clinical Note: Related to autonomic dysfunction and blood pressure instability.
Why It Matters: Limits stamina and daily activity.
Pain (Parkinson’s-Related)
Plain-English: Aches, cramps, stiffness pain, or nerve-like burning discomfort linked to Parkinson’s.
Clinical Note: Can be musculoskeletal, dystonic, neuropathic, or central pain.
Why It Matters: Common in PD and often treatable with the right plan.
Parkinsonism
Plain-English: A set of symptoms that look like Parkinson’s, such as slowness, stiffness, tremor, and balance trouble.
Clinical Note: Can be caused by Parkinson’s disease or other conditions like MSA, PSP, medications, or vascular disease.
Why It Matters: Describes a symptom pattern—not a single diagnosis—so evaluation and treatment change.
Parkinson’s Disease (PD)
Plain-English: A progressive condition affecting movement, mood, thinking, and many body systems.
Clinical Note: Characterized by dopamine neuron loss in the substantia nigra and Lewy body pathology.
Why It Matters: Requires a whole-person, multidisciplinary approach.
Parkinson’s Disease Dementia (PDD)
Plain-English: Cognitive decline that develops after years of Parkinson’s disease.
Clinical Note: Associated with widespread Lewy body pathology.
Why It Matters: Impacts independence, caregiving, and long-term planning.
Parkinson’s Psychosis
Plain-English: Parkinson’s-related hallucinations, delusions, or confusion.
Clinical Note: Often medication-influenced and linked to Lewy pathology progression.
Why It Matters: Early recognition reduces safety risk and caregiver strain.
Postural Hypotension
Plain-English: Feeling dizzy or lightheaded when standing up.
Clinical Note: Often due to autonomic dysfunction or Parkinson’s medications.
Why It Matters: A common and treatable cause of falls.
Postural Instability
Plain-English: Trouble maintaining balance, especially when turning.
Clinical Note: Reflects axial motor system dysfunction.
Why It Matters: Strong predictor of falls.
Postural Tremor
Plain-English: Tremor that appears while holding a position—like holding arms out or holding a cup.
Clinical Note: May overlap with essential tremor or occur alongside Parkinson’s tremor patterns.
Why It Matters: Explains tremor that doesn’t match “resting tremor only.”
Progressive Supranuclear Palsy (PSP)
Plain-English: A condition that can resemble Parkinson’s but often causes early falls and eye movement problems.
Clinical Note: Features gaze palsy, axial rigidity, early falls, and limited levodopa response.
Why It Matters: Frequently misdiagnosed early; planning priorities differ from PD.
REM Atonia
Plain-English: Normal muscle paralysis during dream sleep.
Clinical Note: Loss of REM atonia causes REM Sleep Behavior Disorder.
Why It Matters: A key marker of synuclein-related disease.
REM Sleep Behavior Disorder (RBD)
Plain-English: Acting out dreams—talking, yelling, punching, or kicking.
Clinical Note: Loss of REM atonia due to brainstem dysfunction.
Why It Matters: One of the strongest early markers of synucleinopathy.
Rigidity
Plain-English: Muscle stiffness that makes movement feel tight, resistant, or uncomfortable.
Clinical Note: A core motor feature caused by increased muscle tone from basal ganglia dysfunction.
Why It Matters: Contributes to pain, reduced motion, and fatigue—and can improve with treatment.
Sensory Neuropathy
Plain-English: Numbness, tingling, or burning sensations in the limbs.
Clinical Note: May relate to vitamin deficiencies, diabetes, or medications.
Why It Matters: Can worsen balance and gait instability.
Sialorrhea
Plain-English: Drooling due to reduced automatic swallowing.
Clinical Note: Caused by bradykinesia of throat muscles.
Why It Matters: Socially distressing but very treatable.
Skin Biopsy (Phosphorylated Alpha-synuclein)
Plain-English: A small skin sample used to detect abnormal Parkinson’s protein.
Clinical Note: Detects phosphorylated alpha-synuclein in peripheral nerves.
Why It Matters: Enables biological confirmation without brain imaging.
Sleep Fragmentation
Plain-English: Frequent nighttime awakenings that disrupt sleep.
Clinical Note: Common due to RBD, pain, nocturia, and medication effects.
Why It Matters: Worsens fatigue, cognition, and mood.
Speech-Language Pathologist (SLP)
Plain-English: A therapist who helps with speech, voice, and swallowing.
Clinical Note: Addresses hypophonia, articulation, and dysphagia.
Why It Matters: Early involvement preserves communication and safety.
STN (Subthalamic Nucleus)
Plain-English: A deep brain target often used for DBS.
Clinical Note: STN stimulation can reduce medication needs and improve motor fluctuations.
Why It Matters: Helps patients understand DBS choices and tradeoffs.
Substantia Nigra
Plain-English: A deep brain region critical for movement control.
Clinical Note: Site of dopamine neuron loss in Parkinson’s disease.
Why It Matters: Central to the biology of PD.
Talk Test (Exercise Intensity)
Plain-English: You should be able to talk, but not sing, during exercise.
Clinical Note: Corresponds to moderate-to-vigorous aerobic intensity.
Why It Matters: Matches intensity used in Parkinson’s exercise studies.
Tremor (Resting)
Plain-English: Shaking that happens when the limb is at rest and eases with movement.
Clinical Note: Rhythmic oscillation from basal ganglia–thalamic circuit imbalance.
Why It Matters: Common early sign, but some people never develop tremor.
Urinary Urgency
Plain-English: A sudden strong need to urinate that’s hard to delay.
Clinical Note: Common in PD due to autonomic bladder dysfunction and overactivity.
Why It Matters: Impacts sleep, travel confidence, and daily quality of life.
Visual Misperceptions
Plain-English: Seeing shadows, movement, or shapes that aren’t fully formed hallucinations.
Clinical Note: Often precede hallucinations in Parkinson’s disease.
Why It Matters: Early recognition helps guide medication review and monitoring.