By Dr Ananya Mandal, MD. Dopamine is a neurotransmitter released by the brain that plays a number of roles in humans and other animals. Some of its notable functions are in: 1  movement. 2  memory. 3  pleasurable reward.
Sycamores (Platanus spp.) are tall, spreading shade trees. These North American natives have few problems or pests, but their older bark flakes off in patches. If your sycamore is shedding bark, it may be a healthy, maturing tree.
Sycamore (Acer. pseudoplatanus) b Leaf stalk to 15 cm, leaf 12 x 15 cm, similar to (a) except leaf is thin textured, bright, shiny. green, with finely pointed lobes and teeth. Norway maple. Acer platanoides) c Leaf stalk to 5 cm; leaf to 8 x 12 cm, teeth rounded. Usually a small tree, rarely to 20 m.