The cerebellum does not make movement. It makes it accurate.
Strength is normal. Sensation is usually normal. What fails is timing, scaling and error correction. If you open a cerebellar case by testing power, you have already lost the thread.
The cardinal signs: DANISH
Say the sign, then say what it tells you about the lesion. Listing six words earns less than localising one.
Click a zone. Predict the presentation.
The cerebellum divides into three functional zones. Which zone is hit decides whether you are treating a client who cannot sit still, cannot walk a line, or cannot place a hand accurately.
Tap a zone, or use Tab plus Enter.
Cerebellar stroke, and the days that matter
A cerebellar stroke is the one presentation in this category that can kill a client in front of you. It also gets missed, because early on it looks like a vestibular problem.
Posterior inferior cerebellar artery
Lateral medullary, or Wallenberg, syndrome. The classic crossed picture.
- Ipsilateral facial sensory loss, contralateral body sensory loss
- Ipsilateral ataxia
- Dysphagia and hoarseness
- Ipsilateral Horner syndrome
- Vertigo, nausea, nystagmus
Your first move: confirm the swallow screen. Aspiration risk is high here.
Anterior inferior cerebellar artery
Lateral pontine territory. The one with hearing involvement.
- Ipsilateral hearing loss and tinnitus
- Ipsilateral facial weakness
- Ipsilateral ataxia
- Vertigo and nystagmus
- Crossed sensory findings
Practice point: hearing loss changes how you instruct and cue.
Superior cerebellar artery
Often the most purely cerebellar picture of the three.
- Prominent ipsilateral limb ataxia
- Gait and truncal ataxia
- Dysarthria
- Nausea, vomiting, nystagmus
Practice point: looks like "just balance", but screen for swelling in the first days.
Central or peripheral? The vertigo trap
A cerebellar stroke presenting as isolated dizziness is regularly mistaken for a peripheral vestibular problem. The features below point central, meaning refer rather than treat.
| Feature | Peripheral | Central |
|---|---|---|
| Nystagmus direction | One direction, horizontal | Direction changing, vertical |
| Fixation | Suppresses nystagmus | Does not suppress |
| Gait | Unsteady, can usually walk | Often cannot walk unaided |
| Other neuro signs | Absent | Present, e.g. dysarthria, diplopia |
| Hearing | May be affected | Usually spared, except AICA |
Severe truncal ataxia with an inability to stand, in a client whose limb findings look mild, should raise your suspicion for a cerebellar cause.
Rehabilitation after cerebellar stroke
- Task-specific balance and gait practice at high repetition. The cerebellum is the motor learning structure, so practice is the treatment.
- Progress the base of support deliberately: wide to narrow, static to dynamic, eyes open to reduced vision, stable to unstable surface.
- Trunk and proximal control before expecting distal accuracy.
- Gaze stabilisation and vestibular work where the presentation warrants it and after central causes are managed.
- Equipment: a four-wheeled walker often suits ataxia better than a cane, because it gives a wide, continuous base. Match the aid to the ataxia, not to the habit.
- Falls prevention and home assessment from the outset.
- Expect slower, effortful, variable performance. Fatigue degrades coordination quickly, so distribute practice.
Friedreich and hereditary ataxia, a different job entirely
Stroke is an event you rehabilitate after. Friedreich ataxia is progressive, inherited, and multi-system. Your goal shifts from restoring function to preserving it, and the exam wants you to say that out loud.
What it is
- Autosomal recessive, caused by a trinucleotide repeat expansion affecting the frataxin gene.
- Typically presents in childhood or adolescence, though later onset forms exist.
- Degeneration affects the cerebellum, the dorsal columns, the corticospinal tracts and peripheral nerves, so the picture is mixed, not purely cerebellar.
- Progressive. Many people require a wheelchair for community mobility within roughly a decade or two of onset, though the course varies.
The signs that give it away
- Progressive gait and limb ataxia, dysarthria
- Absent reflexes with an upgoing plantar, a combination that is unusual and characteristic
- Loss of proprioception and vibration, so there is a sensory ataxia component too
- Scoliosis and pes cavus
- Hypertrophic cardiomyopathy
- Diabetes mellitus in a proportion of cases
- Optic and auditory involvement in some
Your physiotherapy role in a progressive ataxia
- Maintain range and prevent contracture
- Monitor and manage scoliosis with the team
- Maintain strength and cardiovascular fitness within cardiac limits
- Maintain transfers and functional mobility for as long as possible
- Timely equipment and seating, before crisis rather than after
- Orthotics and footwear for pes cavus
- Home and school or workplace modification
- Energy conservation and activity pacing
- Falls prevention as the presentation changes
- Education for family and carers
- Reassessment on a planned schedule, because needs move
- Coordinate with the wider team, including genetic counselling
What you gather, and the order
Screen for the dangerous causes first, localise second, then measure function. Examiners score the sequence as much as the content.
Chart and subjective
- Onset: sudden suggests vascular, gradual suggests degenerative or hereditary
- Imaging findings and medical diagnosis
- Family history, which matters here more than in most categories
- Alcohol history, medication, and toxic causes
- Cardiac status, especially in Friedreich
- Swallow and speech status
- Falls history, prior function, home setup, goals
Cerebellar examination
- Finger to nose for dysmetria and intention tremor
- Heel to shin for lower limb coordination
- Rapid alternating movements for dysdiadochokinesia
- Romberg to separate cerebellar from sensory ataxia
- Tone, reflexes, plantar response
- Proprioception and vibration, since dorsal column loss coexists in Friedreich
- Eye movements and nystagmus
- Speech, listening for scanning dysarthria
Function and participation
- Sitting balance, static then dynamic, including truncal sway
- Sit to stand, transfers
- Standing balance, feet apart to together, tandem
- Gait: base of support, variability, turning, stairs
- Upper limb reach, grasp, writing, feeding
- Endurance and how coordination degrades with fatigue
- Falls risk, and role, school, work and driving
Outcome measures worth naming
Naming a measure earns a mark. Naming it and saying what would change your plan earns the reasoning mark on top.
| Measure | What it captures | Why it fits here |
|---|---|---|
| SARA Scale for the Assessment and Rating of Ataxia | Gait, stance, sitting, speech, finger chase, nose-finger, fast alternating movements, heel-shin | The ataxia-specific measure. Name this one first in a cerebellar case |
| ICARS | Posture and gait, limb kinetic function, speech, oculomotor | More detailed, longer. Useful where a fine-grained profile is needed |
| Berg Balance Scale | Static and dynamic balance | Widely understood, tracks falls risk, but can floor in severe ataxia |
| Timed Up and Go | Functional mobility with a turn | Turning is where ataxia shows. Compare to the client's own baseline |
| Dynamic Gait Index / Functional Gait Assessment | Gait under changing demands, head turns, obstacles | Sensitive to the real-world situations that cause falls |
| 10 Metre Walk Test | Gait speed | Simple, repeatable, good for tracking progression |
| 6 Minute Walk Test | Endurance | Shows fatigue-related decline in coordination. Use cardiac caution in Friedreich |
| Activities-specific Balance Confidence scale | Balance confidence | Fear of falling drives activity avoidance and is often the real barrier |
| Nine Hole Peg Test | Upper limb dexterity | Objective measure of the dysmetria the client notices most |
Confirm scoring, cut-offs and minimal detectable change against the source manual before relying on them clinically.
Coordination is trained, not stretched
The cerebellum is the motor learning structure. That single fact should shape the whole plan: high repetition, meaningful tasks, graded difficulty, and enough rest that practice stays accurate.
What the evidence supports
- Intensive, task-specific coordination and balance training. Programmes of continuous whole-body coordination and balance work show meaningful gains in degenerative ataxia, and gains fade if training stops.
- High repetition of the actual task. Practising standing balance builds standing balance.
- Graded progression of postural demand: base of support, surface, vision, dual task.
- Trunk and proximal stability as the platform for limb accuracy.
- Gait training, including supported treadmill work where appropriate.
- Strength and aerobic conditioning for deconditioning, within any cardiac limits.
- Home programme, because dose is what drives the gain and clinic time is finite.
Handle with care, and be able to say why
- Limb weighting and weighted vests. Sometimes reduce tremor amplitude for a specific task, but the evidence is limited and inconsistent, and weight can add fatigue. Trial it, measure it, keep it only if it helps that task.
- Frenkel exercises. Historically standard for ataxia and still used, but they are non-functional and repetition of a meaningful task is generally the better choice. Know them, justify your choice.
- Compensation versus restoration. After a stroke, aim at recovery. In a progressive ataxia, blend training with timely adaptation. Naming which one you are doing, and why, is the reasoning mark.
- Fatigue. Ataxia worsens as the client tires, so long sessions can make performance and safety worse. Distribute practice.
The section that fails candidates
This domain appears in every oral case. In a cerebellar case it is nearly always posterior fossa deterioration, falls, swallowing, or the heart.
Red flags during a session
- Worsening headache, repeated vomiting, rising drowsiness — posterior fossa swelling
- New or worsening neurological signs, or new brainstem signs
- Sudden severe headache, the worst of the client's life
- New diplopia, dysphagia, or slurred speech
- Coughing, wet voice or choking with oral intake
- Chest pain, palpitations, marked breathlessness, especially in Friedreich
- Seizure activity
Stop, position safely, do not leave the client alone, take vital signs, escalate to the medical team, then document what changed and when.
Your standing precautions
- Falls are the dominant daily risk. Plan the environment, the assistance level and the aid before you stand anyone up.
- Guard from the side and slightly behind, and use a gait belt where indicated. Ataxic loss of balance is sudden and multidirectional.
- Confirm the dysphagia screen before any oral intake, especially with PICA involvement.
- Know the cardiac picture in Friedreich before prescribing exercise.
- Watch fatigue, because coordination and safety degrade together.
- Check that any equipment actually suits ataxia. A narrow-based cane can make things worse.
Who you refer to, and exactly why
"I would refer to the team" earns nothing. Name the professional and the clinical reason. That is the whole mark.
Speech-language pathology
Ataxic dysarthria affecting intelligibility, and dysphagia assessment before oral intake, which is a priority in PICA territory stroke.
Physician or neurologist
Diagnosis and cause, imaging, monitoring for posterior fossa complications, medical clearance for activity, and management of progression.
Cardiology
Essential in Friedreich ataxia. Cardiomyopathy and arrhythmia status must inform exercise prescription.
Occupational therapy
Upper limb function and dexterity, activities of daily living, home and workplace assessment, equipment and seating, driving readiness.
Orthotics and orthopaedics
Pes cavus, footwear and bracing, and scoliosis monitoring and management in hereditary ataxia.
Genetic counselling and social work
Inherited conditions raise family-wide questions that are outside physiotherapy scope. Also funding, school and workplace support, and carer strain.
Talking with a client whose speech is affected
Ataxic dysarthria affects the motor production of speech. It does not affect intelligence or language comprehension. Say that line in your case.
Do
- Allow time and do not rush the client's turn
- Reduce background noise, and face the client
- Ask them to repeat, or to say it a different way, rather than pretending you understood
- Confirm key information back to check accuracy
- Use writing, gesture or a communication aid where helpful
- Ask the client what helps them be understood, they already know
Do not
- Raise your voice, or simplify your vocabulary as if to a child
- Speak to the family member instead of the client
- Nod along when you have not understood
- Assume slurred speech means intoxication, cognitive impairment, or reduced capacity
- Finish sentences by default, unless the client has asked you to
Prognosis, scope, and the hard conversations
Situations that show up in cases
- Family asks how fast it will progress. Be honest that the course varies, describe what physiotherapy can influence, and involve the physician for the prognostic discussion. Do not invent a timeline.
- Genetic questions. "Will my other child have it?" is outside your scope. Acknowledge the importance of the question and refer to genetic counselling.
- Driving. Do not clear anyone. Report functional findings and direct the client to the physician and the provincial licensing authority.
- Client declines equipment that you believe would be safer. Explore the reason, which is usually identity rather than logistics, provide information, respect the decision, document it, and revisit.
- Outside your competence. Say so, seek supervision or refer. Hereditary ataxia is uncommon, and no one expects you to have seen many.
Consent and documentation
- Capacity is presumed and is decision specific. Dysarthria is a communication barrier, not evidence of incapacity.
- Consent is ongoing and can be withdrawn mid-session, including non-verbally.
- For a child or adolescent with Friedreich ataxia, involve the young person in decisions to the extent they are able, alongside the substitute decision maker.
- Document objectively: what you found, what you did, what changed, what you decided next, and any escalation.
- Reassess on a planned schedule in progressive conditions, and record the comparison.
Answer out loud, then reveal
Speak for sixty seconds before opening each card. Reading a model answer feels productive and teaches almost nothing.
A client is admitted with sudden onset dizziness, vomiting and unsteadiness. Imaging confirms a right cerebellar infarct. It is day two. Describe your assessment priorities and justify them.
Safety first. Before anything else I would confirm medical stability and check for signs of posterior fossa swelling, because oedema peaks over the first days and can compress the fourth ventricle and brainstem. I would check the documented blood pressure parameters, the level of consciousness, and whether the dysphagia screen has been passed.
Then localise. Cerebellar signs are ipsilateral, so I expect right sided dysmetria, intention tremor and dysdiadochokinesia. I would test finger to nose, heel to shin and rapid alternating movements, assess nystagmus and speech, and use Romberg to confirm this is cerebellar rather than sensory ataxia.
Then function. Sitting balance and truncal control, sit to stand, transfers, standing balance and gait if safe, with appropriate guarding. I would use SARA as my ataxia-specific measure and add a balance measure.
Justification. I prioritise screening because this client can deteriorate, and because an unsafe swallow or an unrecognised falls risk causes more harm in the first days than any delay in starting coordination training.
Midway through standing practice on day three, the same client develops a worsening headache, vomits, and becomes progressively drowsy. What do you do and why?
Immediate. Stop the activity, return the client to a safe supported position, call for help, and do not leave them unattended.
Assess and escalate. Take vital signs, assess level of consciousness against baseline, and perform a rapid neurological screen. Escalate urgently to the medical team, because this pattern suggests posterior fossa swelling with raised intracranial pressure and possible obstructive hydrocephalus, which is a neurosurgical emergency.
Hand over precisely. What the client was doing, exactly what changed, when it changed, and the observations. Document objectively and do not resume therapy without medical clearance.
What loses marks. Sitting the client down and continuing later, or attributing new drowsiness to fatigue from therapy.
How would you distinguish cerebellar ataxia from sensory ataxia on examination, and why does it change your treatment?
The test. Romberg. In sensory ataxia the client is relatively steady with eyes open and becomes markedly unsteady on eye closure, because vision was substituting for lost proprioception. In cerebellar ataxia they are unsteady with eyes open and closing the eyes does not dramatically worsen it.
Supporting findings. Sensory ataxia shows impaired proprioception and vibration, often with reduced reflexes, and a stamping gait. Cerebellar ataxia shows dysmetria, intention tremor, dysdiadochokinesia, nystagmus and scanning dysarthria, with intact proprioception.
Why it matters. In sensory ataxia I would deliberately use vision and other sensory substitution, and address footwear, lighting and environment. In cerebellar ataxia visual input helps far less, so I focus on high-repetition task-specific coordination training and graded postural challenge. Note that Friedreich ataxia has both, which is why I would examine for each rather than assume.
A sixteen year old with Friedreich ataxia is referred for a strengthening and fitness programme. What must you establish first?
Cardiac status, before anything else. Hypertrophic cardiomyopathy is common in Friedreich ataxia and cardiac complications are a leading cause of death. I would review the most recent cardiac assessment and confirm any exercise parameters set by the medical team, and I would not prescribe an exercise programme without that information.
Then the rest of the picture. Diabetes status, scoliosis and any bracing or surgical plan, current mobility and falls, fatigue patterns, school demands, and what the young person actually wants to be able to do.
Then the programme. Within cardiac limits, combine coordination and balance training with strengthening and aerobic work, monitor response, and build in pacing. I would set goals with the young person, involve the family appropriately, and coordinate with cardiology, occupational therapy and the school.
Framing. I would be clear that the aim is maintaining function and participation in a progressive condition, and I would review on a planned schedule rather than discharge and wait.
Your client with cerebellar ataxia keeps falling. They currently use a single point cane. What do you consider?
Reassess the cause of the falls rather than reaching straight for equipment. When and where do they fall, in which direction, during turning or on changing surfaces, and is fatigue or footwear involved.
The aid probably does not match the presentation. A single point cane gives a narrow base and requires accurate placement, which is precisely what ataxia impairs. A four-wheeled walker provides a wide, continuous base of support and is often more appropriate. I would trial it and measure the difference rather than assume.
Then the wider plan. Task-specific balance and gait training, turning practice, home hazard assessment with occupational therapy, footwear, and education on falls recovery and what to do if they cannot get up.
And the person. A walker can feel like a loss of identity for a young client. I would discuss it openly, explain the reasoning, and respect their decision while documenting the recommendation.
A colleague suggests treating your ataxic client with weighted wrist cuffs because it "damps the tremor". How do you respond?
Respectfully, and with the evidence. Limb weighting can reduce tremor amplitude for some clients during some tasks, but the evidence is limited and inconsistent, and added weight can increase fatigue, which worsens ataxia over a session.
I would treat it as a trial rather than a default: pick a specific functional task, measure performance with and without the weight, and keep the intervention only if it demonstrably helps that task for that client. Meanwhile the main plan remains high repetition task-specific coordination and balance training, which has the stronger support.
This also demonstrates incorporating best available evidence with clinical reasoning and client preference, rather than following habit.
Can you do all fourteen?
Tick honestly. Anything unticked is your next study block.
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