A study of five cervicocephalic relocation tests in three different subject groups.

Area of Science:

• Musculoskeletal research
• Neurology
• Biomechanics

Background:

• Neck pain is a prevalent condition affecting numerous individuals globally.
• Understanding sensorimotor control deficits is crucial for effective rehabilitation.

Purpose of the Study:

• To investigate head relocation accuracy in individuals with insidious onset neck pain and whiplash injuries compared to asymptomatic controls.
• To determine if accuracy differs when targeting natural head posture versus complex predetermined positions.

Main Methods:

• A case-control study involving 63 participants divided into three groups: asymptomatic, insidious onset neck pain, and whiplash.
• Head relocation accuracy was assessed using a 3-Space Fastrak system across five different tests.
• Mean absolute relocation error was calculated for each trial.

Main Results:

• A significant difference in head relocation accuracy was observed between groups when targeting natural head posture (p = 0.001).
• Asymptomatic individuals demonstrated significantly better accuracy than both insidious onset neck pain and whiplash groups (p < 0.05).
• No significant differences were found in the other four tests, including those with complex postures.

Conclusions:

• Head relocation inaccuracy is present in neck pain patients, particularly when attempting to achieve natural head posture.
• A trend suggests that whiplash patients may exhibit a greater deficit in this ability.
• Complex or unfamiliar head repositioning tasks do not effectively differentiate between patient groups.