From Wikipedia, the free encyclopedia. A dopamine agonist is a compound that activates dopamine receptors in the absence of that receptor's physiological ligand, the neurotransmitter dopamine. Dopamine agonists activate signaling pathways through the dopamine receptor and trimeric G-proteins, ultimately leading to changes in gene transcription. 1 Uses.
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The Picture Exchange Communication System (PECS) was developed over a decade ago as a unique augmentative, alternative training package that allows children and adults with Autism and other communication difficulties to initiate communication.ECS begins with teaching students to exchange a picture of a desired item with a teacher, who immediately honours the request. For example, if they want a drink, they will give a picture of 'drink' to an adult who directly hands them a drink.