Muscular tonus refers to the natural tension or firmness of a muscle, which is necessary for maintaining posture and movement. There are several synonyms for this term, including muscle tone, muscle tension, and muscular rigidity. Another term that is sometimes used is muscular hypertonicity, which describes excessive muscular tonus that can lead to stiffness and restricted movement. Conversely, hypotonicity refers to a lack of muscular tone, which can result in weakness and poor coordination. Physiotherapists and other healthcare professionals may use these terms when assessing and treating patients with muscular conditions such as spasticity, contractures, or muscle strains. By identifying the precise nature and degree of muscular tonus, they can tailor their treatment approach to meet each individual's unique needs.