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.
Flowering Crab Trees. Few ornamental trees can compare to the flowering crabs. Their fragrant and colourful blossoms in spring are followed by colorful fruits that attract birds in early winter. Some have colored foliage as well. Several have edible fruit used for jellies and preserves.