Proprioceptive Ataxia and Wide-Based Gait

Pathophysiology of Proprioceptive Ataxia

Proprioceptive ataxia results from dysfunction in the sensory pathways that transmit position sense information, specifically affecting the dorsal columns of the spinal cord, dorsal root ganglia, or peripheral sensory nerves 2
Unlike cerebellar ataxia, proprioceptive ataxia is characterized by loss of coordination due to impaired position sense 2
The inability to sense limb position leads to compensatory gait patterns, including a wide-based stance to improve stability 1

Wide-based, unsteady gait is a hallmark feature of proprioceptive ataxia 1
Symptoms worsen when visual input is removed (positive Romberg test), as patients rely heavily on vision to compensate for proprioceptive loss 2, 3
Associated findings often include sensory loss, hyporeflexia, and sometimes weakness 1
Unlike cerebellar ataxia, proprioceptive ataxia typically does not present with nystagmus, dysmetria, or intention tremor 1

MRI of the cervical and thoracic spine is recommended to evaluate for spinal cord pathology when proprioceptive ataxia is suspected 2
Brain MRI is important to rule out cerebellar or brainstem involvement 1, 2
Clinical distinction from cerebellar ataxia is critical, as proprioceptive ataxia worsens with eye closure while cerebellar ataxia does not significantly change 2, 3

Assistive devices (canes, walkers) can improve stability and reduce fall risk 4
Balance training programs should be provided to individuals with poor balance and fall risk 4
Proper fitting of assistive devices and orthoses is essential to maximize benefit 4