Editing Expressive language disorder (section)

==Association with language networks==
There is significant debate about whether specific language impairments, such as expressive language disorder, are caused by deficits in grammar or by a deficit in processing language information.<ref name="Joanisse 1998">{{cite journal | vauthors = Joanisse MF, Seidenberg MS | title = Specific language impairment: a deficit in grammar or processing? | journal = Trends in Cognitive Sciences | volume = 2 | issue = 7 | pages = 240–247 | date = July 1998 | pmid = 21244922 | doi = 10.1016/S1364-6613(98)01186-3 | s2cid = 38440 }}</ref> However, an alternative hypothesis to the cause of SLIs has been posited, called the Procedural Deficit Hypothesis. The Procedural Deficit Hypothesis states that we can explain language impairments due to abnormal development of brain structures that are involved in [[procedural memory]], our memories that remember how to perform different cognitive and motor tasks. The procedural memory system is associated with basal-ganglia circuits in the frontal lobe and further investigation of this particular hypothesis could aid in the development of a clinical neurological picture of what the underlying causes of SLI are.<ref name="Ullman 2005">{{cite journal | vauthors = Ullman MT, Pierpont EI | title = Specific language impairment is not specific to language: the procedural deficit hypothesis | journal = Cortex; A Journal Devoted to the Study of the Nervous System and Behavior | volume = 41 | issue = 3 | pages = 399–433 | date = June 2005 | pmid = 15871604 | doi = 10.1016/s0010-9452(08)70276-4 | s2cid = 1027740 | citeseerx = 10.1.1.211.8238 }}</ref>