What is the primary purpose of the Modified Ashworth Scale (MAS)?

What is the primary purpose of the Modified Ashworth Scale (MAS)?

• A. To assess gross motor function only.
• B. To evaluate nerve conduction velocity.
• C. To measure spasticity related to peripheral muscle tone.
• D. To grade spasticity severity in CNS lesions.

Answer: (D)

Spasticity in central nervous system injuries shows up as increased resistance to passive movement. The Modified Ashworth Scale is a quick, clinical tool designed to quantify how strong that resistance is, giving a numerical grade to the severity of spasticity. This focus on measuring CNS-origin hypertonia—rather than on broader function or on nerve signals—makes it the best description of what MAS does. It’s not intended to assess gross motor function, nor is it a test of nerve conduction velocity. It specifically captures how severe the spasticity is in muscles affected by CNS lesions, helping clinicians track changes over time or in response to treatment.

Spasticity in central nervous system injuries shows up as increased resistance to passive movement. The Modified Ashworth Scale is a quick, clinical tool designed to quantify how strong that resistance is, giving a numerical grade to the severity of spasticity. This focus on measuring CNS-origin hypertonia—rather than on broader function or on nerve signals—makes it the best description of what MAS does. It’s not intended to assess gross motor function, nor is it a test of nerve conduction velocity. It specifically captures how severe the spasticity is in muscles affected by CNS lesions, helping clinicians track changes over time or in response to treatment.