Brain disorders can also have an effect on the display of delta waves. Parkinson's disease, schizophrenia, and narcolepsy are all characterized by changes in delta wave activity. Some drugs and chemicals have been shown to impact the brain's delta waves.
Pruning advanced ornamental trees. Now's the time... Generally speaking an ornamental tree is one that is grown for its decorative looks and not for food. Winter is the perfect time to prune deciduous ornamental trees, as their structures are dormant. Inside the tree though, important processes are underway.
Most spring blooming trees and shrubs set their flower buds in the summer or fall of last year. Pruning them in the spring, before they've bloomed, would mean pruning off this year's flowers. Here's a list of spring bloomers to prune later in the spring. of 12.