10.1 Parkinson Disease and Movement Disorders

Quick Answer: In Parkinson disease, train large-amplitude, cue-supported movement strategies, time demanding practice to a safe medication on window, treat falls as multifactorial (motor + orthostatic + dual-task + environment), and progress dual-task only after single-task control. Do not chase tremor as the main rehab target or ignore off periods.

Progressive movement disorders—especially Parkinson disease (PD)—appear frequently in APC Written Assessment neurology cases because they force clinical prioritisation: what is motor, what is non-motor, what is medication-related, what is environmental, and what is an urgent medical concern. Your job is not to diagnose idiopathic PD from first principles in a short MCQ stem. Your job is to recognise typical impairment clusters, choose safe and effective physiotherapy strategies, and know when to refer or escalate.

Parkinson Disease: Working Frame for Physiotherapy

PD is a progressive neurodegenerative condition associated with loss of dopaminergic neurons in the substantia nigra and more widespread pathology over time. For entry-level physiotherapy reasoning, hold these practical anchors:

• Cardinal motor features commonly taught as a cluster: bradykinesia (slowness and reduced movement amplitude/speed), rigidity (increased resistance to passive movement, often lead-pipe or cogwheel), rest tremor (often asymmetric at onset; may reduce during action), and later postural instability.
• Hypokinesia / akinesia language appears in cases as reduced amplitude, difficulty initiating movement, and freezing of gait.
• Gait pattern often includes reduced step length, reduced arm swing, flexed posture, festination, difficulty turning, and freezing—especially in doorways, crowds, dual-task, or when rushed.
• Course is progressive but highly individual; treatment response to dopaminergic medication is often dramatic early, with more complex fluctuations later.

Do not invent a precise “stage number” if the stem does not give one. Use functional description: independent community walker with freezing; housebound with recurrent falls; requiring assistance for transfers; and so on.

Motor features you must map to intervention

Non-motor features: exam gold because they change the plan

APC cases often embed non-motor problems that explain why a pure “strength and stretch” plan fails:

• Mood and motivation (depression, anxiety, apathy) affecting engagement and activity levels.
• Cognitive change (attention, executive function, later dementia risk) impairing dual-task gait and learning of complex strategies.
• Sleep disturbance and daytime sleepiness altering session tolerance.
• Autonomic features: especially orthostatic hypotension (dizziness/falls on standing), constipation, bladder urgency, sweating changes.
• Pain, stiffness, and secondary musculoskeletal problems from flexed posture and inactivity.
• Speech/swallow concerns (coordinate with speech pathology; never force oral intake trials outside scope).
• Fatigue and reduced stamina even when motor “on.”

Exam rule: if a person freezes only when talking while walking, or falls after rising quickly from a chair, the best answer often addresses dual-task load or orthostatic risk, not more isolated ankle strengthening.

Cueing Strategies and Movement Strategy Training

People with PD frequently lose automatic control of gait and turning. External cues and conscious strategies can bypass impaired internal generation of movement.

Cue types (know the categories)

1. Visual cues — floor markers, laser lines, doorframe focus points, “step over the line,” contrasting edges.
2. Auditory cues — metronome, rhythmic music, counted cadence matched to safe step rate.
3. Attentional / cognitive cues — “big steps,” “heel first,” “wide base,” mental counting, movement imagery.
4. Tactile / proprioceptive cues — light touch cues, weight-shift prompts, sometimes wearable vibrotactile devices in specialist settings.
5. Action observation / demonstration — watching then matching large amplitude movement.

Clinical application principles

• Match cue type to context (home doorway vs outdoor walk vs clinic) and to cognition (complex multi-step cues fail if executive load is high).
• Practise task-specific mobility: sit-to-stand, bed mobility, turning 180°, negotiating doorways, dual-surface walking only when safe.
• Emphasise amplitude and quality (large steps, upright posture, complete weight shift) rather than endless high-repetition tiny steps.
• Teach turning strategies: wide arc turns, “clock turn,” attending to foot placement, avoid tight pivot turns that trigger freezing.
• Train freezing rescue: stop, stand tall, weight shift, use a cue to re-initiate, avoid frantic stepping in place without a plan.
• Reassess whether cues still help as disease progresses; what worked at diagnosis may need simplification later.

Trap: choosing “continuous dual-task conversation during all gait practice” as best early strategy for someone with frequent freezing. Dual-task exposure can be a later goal; it is not the default when safety is threatened.

Falls: Multifactorial, Not One Exercise

Falls in PD are common and multifactorial. APC-style reasoning expects a bundle of risk domains:

Assessment ideas at exam level: history of near-falls/freezing triggers, dual-task walk observation, sit-to-stand quality, turning 360°, orthostatic symptoms, footwear, home layout, and medication timing relative to symptoms. Formal outcome tools may appear by name in stems; still prioritise functional interpretation over tool trivia.

Strength and balance exercise is indicated for many people with PD, but intensity and complexity must fit motor fluctuation and fall history. Supervised programs, progressive challenge, and clear stop rules matter more than “any exercise is fine.”

On/Off Medication Awareness for Session Timing

Dopaminergic therapies (commonly levodopa combinations and other agents) create motor fluctuations in many people over time:

• On: relatively better mobility, less rigidity/bradykinesia (may still have dyskinesia).
• Off: return of bradykinesia, rigidity, freezing, sometimes pain or dystonia.
• Dyskinesia: involuntary movements that can impair balance even when “on.”

Physiotherapy implications

• Ask when medication doses are taken and how long until typical “on.”
• When goals require high-quality gait practice, schedule within a reliable on window if clinically appropriate and the person consents to that plan.
• If the person is markedly off, prioritise safety, transfers, education, and gentle mobility—do not force high-level balance challenges that they cannot control.
• Document performance relative to medication state so the medical team sees functional patterns.
• Never adjust Parkinson medication yourself; escalate concerning patterns (sudden loss of effect, severe off, new confusion, hallucinations) to the medical/neurology team.
• Be alert to postural hypotension related to medication and disease; check symptoms on standing before ambitious gait work.

Exam phrasing pattern: “Most appropriate timing for intensive gait training” → choose the option that uses known medication response and safety, not random convenience alone.

Dual-Task Caution

Walking while talking, carrying, or problem-solving is real life—and a classic PD stress test. Dual-tasking can unmask:

• Freezing and reduced step length
• Increased fall risk
• Cognitive overload and frustration

Progression logic (exam-friendly)

1. Establish safe single-task gait and turning with cues as needed.
2. Add simple secondary tasks only if quality remains acceptable.
3. Progress complexity (cognitive then motor dual-task) when the person can maintain amplitude and stability.
4. If dual-task consistently causes freezing or near-falls, teach task prioritisation (“stop walking to talk in busy environments”) rather than insisting dual-task practice is always “more functional.”

Dual-task training is not forbidden; unsafe dual-task practice without criteria is the error.

Other Movement Disorder Awareness (Brief, APC-Level)

Cases may mention related presentations without deep differential diagnosis demands:

• Atypical parkinsonism (e.g., progressive supranuclear palsy, multiple system atrophy patterns in stems): often poorer levodopa response, earlier postural instability, autonomic or gaze findings—physiotherapy still focuses on mobility, falls, and realistic goals, with earlier equipment needs possible.
• Essential tremor contexts: action/postural tremor more than classic PD rest features—do not automatically apply full PD freezing protocols without supporting features.
• Drug-induced parkinsonism history may appear; still treat functional impairment and escalate medical review of causative agents to the prescriber.

You do not need rare eponym lists. You need impairment-based planning and red-flag referral sense.

Secondary Musculoskeletal and Activity Patterns

Flexed posture, reduced trunk rotation, and inactivity create shoulder, spine, and hip mobility limits and deconditioning. Address:

• Thoracic extension and rotation mobility within comfort
• Hip extension for upright gait
• Lower-limb strength (sit-to-stand, step-ups) with quality focus
• Aerobic capacity at safe intensity
• Pain-informed modification rather than ignoring pain as “just PD”

Encourage long-term physical activity aligned with Australian physical activity guidance adapted to neurological impairment—participation goals (walking groups, adapted exercise classes) often sustain adherence better than clinic-only episodes.

Interdisciplinary and Safety Escalation

Coordinate with:

• Medical/neurology/GP for medication optimisation, orthostatic hypotension, hallucinations, rapid decline
• Occupational therapy for home modifications, dual-task daily living strategies, cognitive supports
• Speech pathology for dysphagia/communication
• Nursing/community services for falls packages and carer support
• Orthotics/equipment providers for walking aids when freezing/falls demand them (aid choice must not increase trip risk)

Urgent/concerning patterns: sudden severe deterioration, new confusion, suspected infection driving decompensation, chest pain, syncope, head injury after fall, or inability to swallow safely—stop therapy heroics and escalate.

APC Case Pattern: Choosing the Best Option

When stems offer four plausible PD interventions, prefer the option that:

1. Protects safety (falls, orthostatic symptoms, freezing in high-risk settings).
2. Matches medication state and energy when intensity matters.
3. Uses cueing/strategy for hypokinesia/freezing rather than only passive treatment.
4. Addresses non-motor contributors when they are the main barrier.
5. Sets participation goals the person values, not only impairment scores.

Common traps

Integration with Thresholds Competencies

• Assessment and planning: holistic motor + non-motor + environment + medication timing.
• Shared decisions: cue preferences, activity goals, carer roles.
• Risk management: falls, dual-task, orthostatic symptoms.
• Scope: do not prescribe PD drugs; do communicate functional response clearly.

Australian Practice Settings for PD Cases

APC stems may place PD care in:

• Community health / ambulatory neuro programs with group and individual streams
• Private practice mixed with musculoskeletal complaints (frozen shoulder, low back pain secondary to flexed posture and falls)
• Residential aged care with high falls risk, polypharmacy, and orthostatic hypotension
• Rural outreach / telehealth adjuncts where cueing education and carer training must travel well between visits

In each setting, the reasoning chain is the same: safety envelope first, then amplitude/strategy training, then participation goals that fit the person’s life (lawn bowls modified, shopping with pacing, church aisle mobility, grandparent roles). Document freezing triggers, dual-task cost, medication timing relative to performance, and any orthostatic symptoms so the next clinician and the medical team can act on functional data—not only a gait speed number.

Closing Exam Anchor

If you remember only one sentence from this section: in Parkinson disease, train amplitude and strategy with the right cues, time intensity to safe on periods, treat falls as multifactorial, and progress dual-task only when single-task mobility is controlled.