The suffix -spasm means involuntary contraction; which is correct?

• A. Cramps
• B. Tremor
• C. Involuntary contraction
• D. Spasm

Answer: (C)

The concept being tested is understanding what the suffix -spasm conveys in medical terms. The suffix -spasm indicates an involuntary contraction of a muscle or group of muscles, so the best match is the phrase “involuntary contraction.” Think of -spasm as signaling the nature of the movement, not naming the contraction itself. The word spasm by itself refers to the contraction, while cramps describe painful contractions and tremor refers to rhythmic shaking, so they don’t define the suffix’s meaning.