What is a characteristic feature of the PLS orthosis?

The PLS (Posterior Leaf Spring) orthosis is designed primarily to provide assistance with dorsi-flexion during the swing phase of gait while allowing for a certain degree of dynamic motion. Its structure is characterized by a thin, flexible leaf spring material that facilitates this movement, enabling the user to achieve a more natural walking pattern. The dynamic nature of the PLS allows the wearer to have some energy return during ambulation, which is essential for individuals with specific lower limb weaknesses, such as those resulting from conditions like drop foot.

In contrast, many orthoses that include rigid components tend to restrict movement rather than facilitate it, which does not align with the PLS design. Stabilizing the hip joint is typically outside the functional scope of a PLS, as its focus is mainly on the ankle-foot complex. Additionally, the use of electrical stimulation is not a feature associated with the PLS orthosis, as it does not require any electronic components. Instead, the PLS relies on its structural design and flexibility to achieve its goals.