Evaluation and Management of Side-Stepping Gait in Dementia
A side-stepping gait in a patient with dementia requires comprehensive gait assessment using validated tools, followed by a multimodal intervention program combining balance and gait training (15-30 minutes daily), medication review with deprescribing of fall-risk drugs, and evaluation for reversible sensorimotor causes including vision, hearing, and peripheral neuropathy.
Initial Evaluation Approach
Gait-Specific Assessment
The evaluation must focus on identifying the specific gait abnormality and its underlying causes. Conduct a comprehensive gait assessment using computerized methods where available 1. Side-stepping patterns often indicate balance impairment, executive dysfunction, or underlying neurological conditions such as Parkinson's spectrum disorders (Dementia with Lewy Bodies), vascular dementia, or frontotemporal lobar degeneration 2.
Key assessment components include:
- History of falls and fall-related injuries (fractures, lesions, dependence, fear of falling) 1
- Validated stepping tests: The Four Square Step Test (FSST) and Choice Stepping Reaction Time Test (CSRTT) show excellent reliability (ICC = 0.83-0.94) and can differentiate between individuals with and without major neurocognitive impairment 3
- Gait speed measurement and dual-task gait testing to reveal subtle changes 4
- Executive function testing: Executive dysfunction strongly predicts stepping accuracy problems, particularly under complex conditions 5
Critical Risk Factors to Identify
Systematically evaluate 1:
- Medication burden: Anticholinergics, benzodiazepines, antipsychotics, opioids
- Muscle weakness and sensory deficits: Vision (presbyopia), hearing (presbycusis), distal polysensory neuropathy
- Environmental hazards: Trip hazards, inadequate lighting
- Nutritional deficiencies: Vitamin B12 (can cause neuropathy)
- Mood disorders: Depression affects functional status
Common pitfall: Failing to recognize that gait disorders may be the most prominent symptom in certain dementia subtypes, particularly Parkinson's spectrum disorders and vascular dementia 2.
Management Strategy
1. Medication Review and Deprescribing (Priority Action)
Immediately review all medications using STOPP/START or Beers criteria 1. Discontinue or reduce:
- Anticholinergics
- Benzodiazepines
- Antipsychotics (unless essential for severe BPSD)
- Opioids
Evaluate drug-drug and drug-disease interactions. This single intervention can significantly reduce fall risk.
2. Structured Exercise Program (Core Intervention)
Prescribe an individualized multicomponent exercise program that specifically targets gait and balance 1:
Daily gait training: 15-30 minutes focusing on:
- Walking ability and endurance
- Stepping accuracy
- Functional mobility training (more effective than static exercises alone) 6
Balance exercises: 1-2 sets of 4-10 different exercises, 2-7 days/week:
- Both static and dynamic postures
- 5-10 to 15-30 minute sessions
Resistance training: 1-3 sets of 8-12 repetitions, 2-3 days/week:
- Start at 20-30% of one-repetition maximum
- Progress to 60-80%
- Incorporate daily activities
Aerobic exercise: 10-20 minutes, 3-7 days/week:
- Intensity: 12-14 on Borg scale (55-70% heart rate reserve)
Target total: 50-60 minutes daily, distributed throughout the day to accommodate fatigue 1. Physical therapy assessment is ideal 1.
Evidence strength: Exercise programs combining strength, balance, and functional mobility training improve gait in mild cognitive impairment and dementia 6. When combined with cognitive training focused on attention and executive function, results are enhanced 6.
3. Cognitive Training Integration
Combine physical exercises with concurrent cognitive training rather than separate sessions 6. Focus on:
- Attention tasks
- Executive function training
- Functional context (helps generalize to everyday activities)
This dual-task approach addresses both physical and cognitive factors affecting gait performance 6.
4. Address Reversible Sensorimotor Causes
Systematically evaluate and treat 2:
- Vision: Presbyopia correction, cataract surgery if indicated
- Hearing: Hearing aids for presbycusis (known reversible dementia risk factor)
- Peripheral neuropathy: Check vitamin B12, folate; treat deficiencies 1
- Balance disorders: Formal physical therapy assessment
Critical point: Sensorimotor impairments substantially increase fall risk when combined with cognitive impairments in judgment, attention, and visuospatial awareness 2.
5. Environmental Modifications
Implement immediately:
- Remove trip hazards
- Install grab bars in shower
- Ensure adequate lighting (night lights)
- Provide assistive devices if indicated (walking stick, walker)
6. Dementia Medication Considerations
Continue cholinesterase inhibitors or memantine if already prescribed, as they may improve gait variability and general motor function 6, 4. However, monitor rivastigmine closely for dizziness and weight loss that could worsen fall risk 1.
Antidementia medications may improve gait variability in Alzheimer's disease specifically 6.
7. Ongoing Monitoring
- Regular fall risk reassessment using validated tools 1
- Osteoporosis and fracture risk assessment for all patients 1
- Depression screening: Use short, simple tools as depression affects functional status 1
- Adherence support: Patients with dementia need reminders and caregiver involvement for exercise programs 1
Key Algorithmic Decision Points
If side-stepping gait + parkinsonism features → Consider Lewy body dementia or Parkinson's disease dementia; neurology referral
If side-stepping gait + executive dysfunction → Emphasize dual-task training and executive function cognitive exercises
If side-stepping gait + polypharmacy → Medication review is first priority
If side-stepping gait + sensory deficits → Address vision/hearing/neuropathy before intensive exercise program
If side-stepping gait + recurrent falls → Immediate multimodal intervention with all components above