Ginkgos are medium-large decidious trees, reaching 20-35 m height (some specimens in China being over 50 m), with an often-angular crown and long, somewhat erratic branches. They are usually deep rooted and resistant to wind and snow damage. Young trees are often tall and slender and sparsely branched. Ginkgo increases blood flow to the brain and has excellent restorative effects on the nervous system. It is useful for disturbed brain functions, which result in dizziness, tinnitus, and headache with emotional liability and anxiety.