"Rosers sign" is a medical term used to describe an indication of muscle weakness observed in patients with brainstem lesions. Synonymous terms for this condition may vary depending on the medical field. For instance, in neurology, it may be referred to as "Sheehan's sign" or "Wartenberg’s sign", whereas in neurosurgery, it may be classified as "thumb sign" or "opponens sign". These synonymous terms describe the same clinical observation, which involves weakness or paralysis of the thumb adductor muscles. The usage of synonyms allows medical professionals to communicate effectively about the specific diagnostic finding, providing a common language for accurate diagnosis and treatment.