2. The Phenomenon of Foot Drop: A Hidden Manifestation of HIBM
Foot drop is another prominent symptom often associated with HIBM. It is marked by difficulty in lifting the front part of the foot, which can lead to the foot dragging on the ground while walking. This sign can easily be dismissed as an oddity or a quirk, yet it holds significant diagnostic value in the context of HIBM.
Foot drop results from the weakness of the dorsiflexor muscles, responsible for lifting the foot at the ankle. In the early stages of HIBM, this muscle group can be particularly affected, leading to the manifestation of foot drop. This symptom may start as a slight change in gait, with the affected individual lifting their knee higher to prevent the foot from scraping the ground, termed a “steppage gait.”
Progression of foot drop can lead to difficulties in mobility, and increase the risk of falls and injuries. The advent of assistive devices, such as braces or foot splints, may become necessary to facilitate walking and prevent accidents. Understanding this symptom, its implications, and the potential for intervention can play a pivotal role in maintaining mobility and independence in individuals with HIBM.
The manifestation of foot drop is not confined to the realm of HIBM. It can be a feature of several neuromuscular disorders and as such, requires careful examination and consideration in conjunction with other symptoms for an accurate diagnosis. (2)
