A hormone that is made by the thyroid gland and is one of the most important thyroid hormones. Four iodine molecules are attached to the molecular structure of thyroxine. Along with the more powerful thyroid hormone triiodothyronine (T3), thyroxine affects almost every process in the body, including body temperature, growth, and heart rate. Also known as T4.
The larger of the two long bones in the lower leg. The tibia is familiarly known as the shinbone.
- Tibia vara
A condition that is characterized by disturbance of normal growth in the inner part of the upper tibia. Tibia vara causes a bowlegged gait and can impair the knees significantly. It is most common in children of African descent. Treatment usually involves surgery, although a knee-ankle-foot orthosis brace may be used. Also known as Blount […]
- Tibial bowing
Improper growth of the tibia in the leg, causing bowlegs or other leg problems. The tibia may bow anteriorly (in the front) or posteriorly (in the back). See also tibia vara.
- Tibial muscular dystrophy
Muscular dystrophy, tibial.
A repetitive movement that is difficult, if not impossible to voluntarily control. Tics can affect any group of muscles. The most common are facial tics, such as eye- blinking, nose-twitching, or grimacing. Tics that affect the muscles used to produce speech are known as vocal tics, and can range from grunts or whistles to the […]