The psoas is a deep-seated core muscle connecting the lumbar vertebrae to the femur. The psoas major is the biggest and strongest player in a group of muscles called the hip flexors: together they contract to pull the thigh and the torso toward each other.
7 photos: Photos: Tallest man meets shortest man. Chandra, meet Sultan â Chandra Bahadur Dangi, at 21Â½ inches the shortest adult ever verified by Guinness World Records, poses Thursday in London with the world's tallest man, Sultan Kosen, who stands 8 feet 3 inches tall.
Amge, who has a form of dwarfism called achondroplasia, was previously ranked as the worldâs shortest teenager, until 2011, when she succeeded an American, Bridgette Jordan, as the worldâs shortest woman, according to Guinness. She is not expected to grow any more.