Dysarthria can manifest as a symptom of various neurological conditions such as Parkinson’s disease (PD), amyotrophic lateral sclerosis (ALS), multiple sclerosis (MS), and Huntington’s disease (HD). Given that different brain structures are affected by these diseases, the resulting dysarthria symptoms can vary. However, studies that systematically investigate and compare the speech motor impairment patterns of talkers with different disease types are rare. In this talk, Antje Mefferd will focus on two aspects of speech motor behavior that are considered important to produce intelligible speech: articulatory amplitude and inter-articulatory timing. Mefferd has studied these two aspects in talkers with PD, ALS, MS, and HD using 3-dimensional electromagnetic articulography to assess the movements of the tongue, lips, and jaw. Shared and disease-specific speech motor impairment patterns of these talkers as well as emerging dysarthria subtypes within each disease group will be discussed. Overall, findings from Mefferd's work suggest that disease-specific speech motor impairment patterns exist, but the severity of the dysarthria may also play an important role.