What does the prefix 'quadri-' refer to in medical terms?

The prefix 'quadri-' in medical terminology refers to the number four. It comes from the Latin word "quattuor," which means four. This prefix is commonly used in various medical terms to indicate four parts or aspects of something. For example, 'quadriplegia' refers to the paralysis of all four limbs, indicating that all four extremities are affected. Understanding this prefix helps in deciphering terms accurately in medical contexts.