For a client with a herniated intervertebral lumbar disk, what symptom suggests muscle spasm in the area of the herniated disk?

Stabbing pain radiating to the lower back and the right buttock is indicative of muscle spasm in the area of a herniated intervertebral lumbar disk. This symptom can occur due to the body's reaction to the irritation and inflammation caused by the herniated disk. Muscle spasms are often a defense mechanism in response to pain or injury, leading to tightness and discomfort in the surrounding muscles.

When a lumbar disk herniates, it can impact adjacent muscles, prompting them to contract involuntarily in an attempt to stabilize the spine and protect it from further injury. The combination of stabbing pain, particularly if it specifically targets the lower back and buttock, suggests that the muscles around the affected disk are in spasm, contributing to the pain experienced by the patient.

Other options suggest different symptoms associated with nerve involvement or sensory changes. Pain radiating to the right leg could indicate nerve root compression, weakness in the left leg suggests motor nerve involvement, and persistent numbness in the left arm is less likely related to a lumbar issue and may point towards a cervical problem. Understanding these distinctions is crucial in assessing the condition and tailoring the treatment appropriately.