Ataxia (from Greek ataxiā(αταξία), meaning failure to put in order) is a neurological sign and symptom consisting of unsteady and clumsy motion of the limbs and torso, due to a failure of the gross coordination of muscle movements, most evident on standing and walking. Ataxia is an aspecific clinical manifestation implying dysfunction of parts of the nervous system that coordinate movement, such as the cerebellum. Several possible causes exist for these patterns of neurological dysfunction. The "International Ataxia Awareness Day" is celebrated on September 25th each year.