Cerebellar Ataxia and Muscle Weakness Distinction

Key Distinction Between Ataxia and Weakness

• The American College of Radiology states that cerebellar ataxia is a disorder of motor coordination, not muscle strength, and that muscle weakness and hypotonia are separate entities that may manifest with gait and postural abnormalities mimicking ataxia 1
• Clinicians must exclude weakness as an alternative explanation for a patient's symptoms, along with sensory disturbances and vestibular dysfunction, before diagnosing cerebellar ataxia is not applicable due to lack of citation, however The American College of Radiology explicitly states that muscle weakness and hypotonia are separate entities 1

Clinical Manifestations

• Truncal ataxia, or difficulty maintaining posture while standing, is particularly common with cerebellar vermian pathology and represents a balance/coordination problem, not muscle weakness, according to the American College of Radiology and other clinical guidelines 1, 2