1 For instance, contributions to a Roth IRA are not tax deductible while contributions to a traditional IRA may be deductible. 2  However, while distributions (including earnings) from a traditional IRA may be included in income, the distributions (including earnings) from a Roth IRA are not included in income. For instance, contributions to a Roth IRA are not tax deductible while contributions to a traditional IRA may be deductible. 2  However, while distributions (including earnings) from a traditional IRA may be included in income, the distributions (including earnings) from a Roth IRA are not included in income.
Reduced brain blood flow can lead to dizziness, lightheadedness, and, sometimes, loss of consciousness. It can occur when getting up rapidly because blood pools in the abdomen and legs due to gravity if something interrupts the normal mechanisms that help return blood back up to the heart and brain.
Cerebral blood vessels are able to change the flow of blood through them by altering their diameters in a process called autoregulation; they constrict when systemic blood pressure is raised and dilate when it is lowered.oo little blood flow (ischemia) results if blood flow to the brain is below 18 to 20 ml per 100 g per minute, and tissue death occurs if flow dips below 8 to 10 ml per 100 g per minute.