For example, a fragment of a broken bone following an ankle injury, or bone block, can get in the way and restrict motion. Sometimes equinus is related to a bone blocking the ankle motion. In addition, diabetes can affect the fibers of the Achilles tendon and cause tightness. Other patients acquire the tightness from being in a cast, being on crutches or frequently wearing high-heeled shoes.
In some patients, this tightness is congenital (present at birth), and sometimes it is an inherited trait. Often, it is due to tightness in the Achilles tendon or calf muscles (the soleus muscle and/or gastrocnemius muscle). There are several possible causes for the limited range of ankle motion. Other patients compensate by toe walking, while a smaller number take steps by bending abnormally at the hip or knee. The most common methods of compensation are flattening of the arch or picking up the heel early when walking, placing increased pressure on the ball of the foot. People with equinus develop ways to compensate for their limited ankle motion, and this often leads to other foot, leg or back problems. When it involves both feet, the limitation of motion is sometimes worse in one foot than in the other. Someone with equinus lacks the flexibility to bring the top of the foot toward the front of the leg.
Equinus What Is Equinus?Įquinus is a condition in which the upward bending motion of the ankle joint is limited. Please enable Javascript in your browser. Javascript is required to view the content on this page.
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