With increasing age, the kidney atrophy shifts the renal parenchyma pyelon index to 1:2:1. Renal Ultrasound Anatomy The kidney is a bean-shaped organ, which has usually a smooth convex lateral organ boundary.
Bipolar disorder may result from a chemical imbalance within the brain. The brain's functions are controlled by chemicals called neurotransmitters. An imbalance in the levels of one of these neurotransmitters, such as norepinephrine, may cause bipolar disorder. When levels of this chemical are too high, mania occurs.
Genetics: A Primary Cause of Bipolar Disorder. In searching for the answer to what causes bipolar disorder, scientists report genetics may be one of the key culprits, as bipolar disorder seems to run in families. Here are some important statistics on bipolar genetics: 1  First-degree relatives of people with bipolar disorder type 1 are seven times more likely to develop bipolar 1 over the regular population. 2  Children of a parent with bipolar disorder have a 50% chance of having a major psychiatric illness.