Differential Diagnosis of Sensory Ataxia

Clinical Features and Diagnostic Approach

The American Academy of Neurology suggests that the sensation of walking on uneven ground without confirmed neuropathy most likely represents sensory ataxia from large fiber dysfunction affecting proprioception, and requires immediate comprehensive neurological examination with specific focus on vibration sense, proprioception testing, and gait assessment to identify the underlying cause 1, 2
The American Diabetes Association recommends vibration testing with a 128-Hz tuning fork at the great toe and malleoli to assess large fiber function, which is often the earliest and most sensitive finding 2, 3
Proprioception testing at the great toe and ankle joints with eyes closed is recommended by the American Academy of Neurology to assess large fiber function 1, 2
The American College of Emergency Physicians suggests that gait assessment, including tandem walking, will be impaired in sensory ataxia 1, 4
The American Academy of Neurology recommends evaluating deep tendon reflexes, particularly ankle reflexes, which may be diminished or absent in patients with sensory ataxia 2, 5

The American Academy of Neurology recommends ruling out serious neurological conditions, such as Parkinson's spectrum disorders, vascular cognitive impairment, or frontotemporal lobar degeneration syndromes, which can present with gait and balance impairment 1
The American Diabetes Association suggests evaluating for prediabetes or undiagnosed diabetes with fasting glucose and HbA1c, as well as vitamin B12 deficiency, which can cause large fiber neuropathy and is treatable 5, 6

The American Geriatrics Society recommends implementing immediate safety interventions, including home safety assessment, assistive devices, and physical therapy referral, to reduce the risk of falls in patients with sensory ataxia 1, 4
The American Academy of Neurology suggests that treatment depends entirely on the underlying etiology identified through diagnostic workup, and may include vitamin B12 replacement therapy, aggressive glucose control, or discontinuation of offending medications 1, 2, 5