Astasias can be defined as a medical condition where the patient is unable to maintain a standing or upright position due to a loss of muscle tone. The term also refers to the inability to initiate movement. It is a rare disorder that affects the nervous system, particularly the cerebellum. Synonyms for astasias include ataxic gait, muscle weakness, postural instability, and balance disorder. Other synonyms might include a lack of coordination, difficulty maintaining balance, and unsteadiness. People with this condition may also experience dizziness, vertigo, and fatigue. Early detection and proper treatment are crucial to managing the symptoms of astasias.