Lateral view of the human ankle
The ankle, or the talocrural region,
 is the region where the
The main bones of the ankle region are the
As a region, the ankle is found at the junction of the
The talocrural joint is the only mortise and tenon joint in the human body,.
:1418 the term likening the skeletal structure to the
Because the motion of the subtalar joint provides a significant contribution to positioning the foot, some authors will describe it as the lower ankle joint, and call the talocrural joint the upper ankle joint. 
The bony arch formed by the tibial plafond and the two malleoli is referred to as the ankle "
The distances between the bones in the ankle are as follows: 
Decreased distances indicate
Though it does not span the ankle joint itself, the syndesmotic ligament makes an important contribution to the stability of the ankle. This ligament spans the
The bony architecture of the ankle joint is most stable in
A number of tendons pass through the ankle region. Bands of connective tissue called retinacula (singular: retinaculum) allow the tendons to exert force across the angle between the leg and foot without lifting away from the angle, a process called bowstringing. 
Mechanoreceptors of the ankle send proprioceptive sensory input to the central nervous system (CNS).  Muscle spindles are thought to be the main type of mechanoreceptor responsible for proprioceptive attributes from the ankle.  The muscle spindle gives feedback to the CNS system on the current length of the muscle it innervates and to any change in length that occurs.
It was hypothesized that muscle spindle feedback from the ankle dorsiflexors played the most substantial role in proprioception relative to other muscular receptors that cross at the ankle joint. However, due to the multi-planar range of motion at the ankle joint there is not one group of muscles that is responsible for this.  This helps to explain the relationship between the ankle and balance.
In 2011, a relationship between proprioception of the ankle and balance performance was seen in the CNS. This was done by using a fMRI machine in order to see the changes in brain activity when the receptors of the ankle are stimulated.  This implicates the ankle directly with the ability to balance. Further research is needed in order to see to what extent does the ankle affect balance.