A section that is cut along the long axis of a structure. Longitudinal section is the opposite of cross-section.
Inward curvature of the spine. The spine is not supposed to be absolutely straight, so some degree of curvature is normal. When the curve exceeds the usual range, it may be due to musculoskeletal disease or simply to poor posture. Treatment usually involves physical therapy, although in severe cases surgery, casting, and/or bracing may be […]
- Loss-of-function mutation
A mutation that results in reduced or abolished protein function. Gain-of-function mutations,which are much less common, confer an abnormal activity on a protein.
- Lou Gehrig disease
ALS usually leads to death within 5 years of the time the diagnosis of ALS is made; the range is from 2 to 7 years.
- Love pearls
Street name for alpha-ethyltryptamine.
- Low back pain
Pain in the lower back area that can relate to problems with the lumbar spine, the discs between the vertebrae, the ligaments around the spine and discs, the spinal cord and nerves, muscles of the low back, internal organs of the pelvis and abdomen, or the skin covering the lumbar area.