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.
The reduction in cerebral blood flow is marked. Cerebral blood flow (CBF) decreases quite markedly with hypocapnia: a decrease of 4% per mmHg reduction in pCO2. For example, an acute drop in pCO2 from 40 down to 25mmHg will decrease CBF by about 60%. In awake subjects this can cause light-headedness and even confusion.