by Kelly Dorfman, MS, LND Convincing evidence shows that certain substances can improve specific aspects of thinking. Here are three promising supplements to consider for anyone interested in improving cognitive function. DMAE (Dimethylaminoethanol):  DMAE is a relative of the nutrient choline.  But, unlike choline, DMAE readily crosses the brain-blood barrier.  It thus directly increases the generation of acetylcholine, an important neurotransmitter. Choline (and DMAE?) is (are?) found in eggs, fish and soybeans. Acetylcholine is abundant in both the cerebral cortex and the cerebellum, and is thus involved in cognitive processes controlled by these parts of the brain, such as memory, problem solving, organization, rational thinking, balance and movement.  Children with motor issues and low arousal may benefit from an increase in acetylcholine availability. Indications: Best for children whose prevailing problems are spaciness and poor organizational skills. Precautions: Avoid in children who have high muscle tension, sleep disturbances or agitation rather than distractibility. DMAE can increase muscle tension levels.  As with…