Babinski sign is a reflexive response indicative of underlying neurological disorders. The reflex is tested by stroking the sole of the foot, and if the big toe extends upward, it indicates a positive Babinski sign. There are different synonyms for this term, including Babinski's reflex, plantar response, and upgoing toe sign. Other related terms include Hoffman's sign, Chaddock's sign, and Gordon's sign, which also test for similar neurological conditions. The Babinski sign is often associated with neurological damage, such as spinal cord injuries, nerve damage, and brain disorders like stroke, multiple sclerosis, and Parkinson's disease. Therefore, it's important for healthcare professionals to recognize and interpret the Babinski sign accurately.