Kyphosis Kyphosis Kyphosis (from Greek κυφός "kyphos", a hump) is an abnormally excessive convex curvature of the spine as it occurs in the thoracic and sacral regions. (Abnormal inward concave "lordotic" curving of the cervical and lumbar regions of the spine is called lordosis.) Kyphosis can be called roundback or Kelso's hunchback. It can result from degenerative diseases such as arthritis; developmental problems, most commonly Scheuermann's disease; osteoporosis with compression fractures of the vertebra; multiple myeloma or trauma. A normal thoracic spine extends from the 1st to the 12th vertebra and should have a slight kyphotic angle, ranging from 20° to
Body louse Body louse The body louse ("Pediculus humanus humanus", sometimes called "Pediculus humanus corporis") is a louse that infests humans. The condition of being infested with head lice, body lice, or pubic lice is known as pediculosis. Body lice are vectors for the transmission of the human diseases epidemic typhus, trench fever, and relapsing fever. The body louse genome sequence analysis was published in 2010. "Pediculus humanus humanus" (the body louse) is indistinguishable in appearance from "Pediculus humanus capitis" (the head louse) but will interbreed only under laboratory conditions. In their natural state, they occupy different habitats and do not usually