NEET PG DENTAL EXAM

Detailed explanation-1: -Most people are born with 12 ribs on each side of the body, making a total of 24 ribs. Some people are born with more than 24 ribs. These extra ribs are called supernumerary ribs. When people are born with less than 24 ribs, it is called agenesis of the ribs.

Detailed explanation-2: -Supernumerary ribs also called accessory ribs are an uncommon variant of extra ribs arising most commonly from the cervical or lumbar vertebrae. They occur in 0.5% to 1% of the general population and are typically bilateral. Normal is 12 thoracic (rib bearing) and five lumbar (non-bearing) ribs.