Predator Communities With Invasive Pike Are Associated With Changes in Parental Care and Brain Gene Expression in Wild Alaskan Stickleback.

Multiple Sclerosis (MS) is a complex neuroinflammatory disorder characterized by heterogeneous clinical manifestations affecting motor, sensory, and cognitive functions. The therapeutic landscape for MS has undergone a remarkable transformation over the past two decades, with the advent of highly effective disease-modifying therapies substantially altering the natural history of the disease, leading to a contemporary patient population with significantly lower disability levels, and slower progression rates. This paradigm shift means that traditional outcome measures, developed for more severely affected patients, may now lack the sufficient sensitivity to detect subtle but clinically meaningful changes in early-stage disease. The Expanded Disability Status Scale (EDSS), developed more than four decades ago, remains the gold standard for disability assessment despite well-recognized limitations. Its ordinal nature, physician-dependent scoring, and emphasis on ambulatory function render it insensitive to early functional changes, particularly in individuals with minimal clinical disability. Similarly, the Timed 25-Foot Walk (T25FW), a standard measure of ambulatory function and lower limb component of Multiple Sclerosis Functional Composite (MSFC), has demonstrated limited discriminative ability in early-stage people with MS (pwMS) who typically maintain preserved walking speed. This creates a significant diagnostic gap, where subclinical functional impairments in sensorimotor reserve can accumulate undetected, potentially delaying opportunities for timely interventions. Balance impairment is a prime candidate to fill this gap. Previous studies have shown that balance impairment is prevalent in MS. Importantly, balance deficits can manifest even in the earliest stages of the disease, often preceding clinically apparent gait limitations. The pathophysiology of balance dysfunction in MS is multifactorial, involving disintegration of proprioceptive control and complex disruptions across the somatosensory, visual, and vestibular systems that are essential for maintaining postural control. Postural control impairment can also be detected in patients with a negative Romberg sign when more sensitive measurement methods are used. These findings indicate that postural control systems are among the earliest to be affected by the MS disease process, making balance assessment a potentially valuable tool for early disability detection.