Causes of Dysarthria - Differential Diagnosis Algorithm Lower Motor Neuron - Slow, Low Volume, Breathy Speech, Tongue and Facial Atrophy Fasciculations • Motor Neuron Disease • Lesions of Cranial Nerves VII, IX, X, XII • Myasthenia Gravis • Muscular Dystrophy Upper Motor Neuron - Slow, strangulated, harsh voice, Positive jaw jerk, hyperactive gag reflex. Emotional lability • Bilateral Lacunar Internal Capsule Strokes • Multiple Sclerosis • Amyotrophic Lateral Sclerosis Ataxic (Cerebellar) - Irregular Rhythm and Pitch • Spinal-Cerebellar Ataxia • Multiple Sclerosis • Alcohol • Tumour • Paraneoplastic Disorder Extra-Pyramidal - Rapid, Low Volume, Monotone Speech • Parkinson's Disease #Dysarthria #Neurology #Differential #Diagnosis #Algorithm #Causes
