Which domain includes decreased activity of deep neck flexors and delayed activation of deep and superficial neck muscles?

• A. Altered motor performance
• B. Altered sensory processing
• C. Altered NM control
• D. Pain modulation

Answer: (A)

The key idea is how the motor system controls the neck muscles during movement. Deep neck flexors provide important segmental stabilization, and they normally work in coordinated timing with the deeper and superficial neck muscles. When those deep flexors show reduced activity and there’s a delay in activation of both deep and superficial muscles, the result is a change in how the muscles are activated and coordinated during tasks. That’s a motor-performance issue: it describes alterations in activation magnitude and the timing of muscle recruitment rather than changes in sensation, pain processing, or general neuromuscular coordination patterns. Sensory processing would involve proprioceptive or sensory perception changes, pain modulation involves how pain signals are processed, and while neuromuscular control deals with coordination, the specific pattern here—underactivity and delayed timing of muscle activation—fits best with altered motor performance.