Ankle Sprains

Ankle sprains are common injuries that occur when ligaments are stretched or torn. The ankle sprain is the most common athletic injury. Nearly 85% of ankle sprains occur laterally, or on the outside of ankle joints. Sprains on the inside ligaments are less common. Many sprains occur when participating in sports, or by twisting the ankle when walking on an uneven surface. Some individuals, due to their bone structure or foot type, are more prone to ankle sprains.

Ankle Joint Anatomy

The ankle joint is made up of three bones. The bones are called the tibia, fibula, and talus. These bones form a socket in which the ankle joint moves. 
 The tibia, fibula and talus are connected to each other by ligaments. Think of ligaments as thick rubber bands that hold bones together so that joints are stable and function properly. When an ankle is sprained, a ligament is either stretched, partially torn, or completely torn. Muscle and tendon structures surround the ligaments. These structures provide motion of the ankle joint for walking and running. Blood vessels, nerves and skin overlie the ligaments and tendons. The ankle joint moves the foot upward and downward. Just below the ankle joint is a ball and socket type joint that allows inward and outward motion.

Ankle Sprain Symptoms

Ankle sprain symptoms vary depending on severity. Often, the ankle Is tender, swollen and discolored. The ankle can be quite painful to touch. Walking is usually hampered and may become difficult depending on the severity of the sprain. A feeling of instability may occur, especially in severe ankle sprains when ligaments are torn. Ankle sprains are classified by "types" and range from mild to moderate to severe. Classifying ankle sprains helps the podiatric foot and ankle surgeon diagnose the specific structures involved in the injury. This also helps determine appropriate treatment plans for each type of ankle sprain. Type I ankle sprain, the least severe, occurs when ligament fibers have been stretched or slightly torn. Type II sprain occurs when some of these fibers or ligaments are completely torn. Type III, the most severe, occurs when the entire ligament is torn and there is significant instability of the ankle joint. Fractures of the ankle bone or outside the foot bone may be present. Fractures require immediate diagnosis and attention for appropriate treatment.
 

Diagnosis
Dr. Corrigan examines the ankle to identify the type of ankle sprain and determine the appropriate method of treatment. X-rays or specialized X-ray views of the ankle and foot may also be used to reveal any fractures, dislocations or instability of the ankle joint. Less frequently, more sophisticated testing is necessary to examine soft tissue injuries. For example, computerized tomography (CT) and magnetic resonance imaging (MRI) give detailed views of the bone and soft tissue structures around the ankle joint.
 

The preceding is for informational purposes only. The material is derived from the current medical knowledge on the topics listed. The content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. This site does not provide medical advice.  A special "thank you" is extended to the American College of Foot and Ankle Surgeons, as much of the information is derived from their literature and websites.