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From: Sandra Merlo
Date: 04 Oct 2008
Time: 19:07:42 -0500
Remote Name: 201.95.203.118
Dear Mark, thank you for your question. Experimental and clinical research indicates that there are two kinds of long-term memory: declarative and procedural. Skill learning is considered one example of procedural memory. There is evidence that basal ganglia are the brain structures responsible for skill learning. Several studies indicate a basal ganglia involvement in stuttering (particularly the striatum). Accordingly, a lot of studies indicate a basal ganglia involvement in Parkinson’s disease (particularly the substantia nigra). With regard to dopamine (the most important neurotransmitter in basal ganglia), there seems to be an excessive concentration of dopamine in stuttering, but a lack of dopamine in Parkinson’s disease. Best regards, Sandra