Which medical sign indicates weakness of the proximal muscles of the lower limb?

Gower's sign is indicative of weakness in the proximal muscles of the lower limb, particularly in conditions affecting muscle strength and function, such as muscular dystrophies. When a person exhibits Gower's sign, they demonstrate difficulty rising from a seated or lying position. They often need to use their hands to climb up their own body, indicating that the proximal muscles—such as those in the hips and thighs—are unable to provide the necessary strength for this motion. This sign is particularly notable in children with muscular dystrophy, where muscle weakness becomes apparent in their ability to stand or walk.

The other options represent different clinical assessments that are not specifically related to proximal muscle weakness. Pathological reflexes are signs of neurological dysfunction rather than isolated muscle weakness. Clonus refers to a rhythmic contraction and relaxation of a muscle, often associated with upper motor neuron lesions, and the Romberg test assesses proprioceptive and vestibular function, rather than specifically indicating weakness in proximal muscles.