Alterations in Cervical Nerve Root Function during Different Sitting Positions in Adults with and without Forward...

Area of Science:

• Neurology
• Biomechanics
• Ergonomics

Background:

• Forward head posture (FHP) is prevalent and may impact cervical nerve root function.
• Understanding how posture affects nerve function is crucial for preventing musculoskeletal issues.

Purpose of the Study:

• To investigate differences in cervical nerve root function between individuals with and without FHP across various sitting positions.
• To determine the influence of sitting posture on dermatomal somatosensory-evoked potentials (DSSEPs) in relation to head posture.

Main Methods:

• Dermatomal somatosensory-evoked potentials (DSSEPs) were measured at C6, C7, and C8 in 60 participants (30 with FHP, 30 with normal head posture - NHP).
• Measurements were taken in three positions: erect sitting, slouched sitting, and supine.
• Participants were aged 18-28, healthy, and without pain. NHP was defined as a craniovertebral angle (CVA) >55°.

Main Results:

• Significant differences in cervical nerve root function (DSSEPs) were found between NHP and FHP groups across all postures (p < 0.001).
• No significant differences were observed in the supine position (p > 0.05).
• NHP group showed greatest DSSEP peaks in erect sitting, while FHP group had largest DSSEP amplitudes in slouched sitting.

Conclusions:

• Sitting posture significantly influences cervical nerve root function differently in individuals with and without FHP.
• The optimal sitting posture for cervical nerve root function appears to be posture-dependent and may vary based on an individual's CVA.
• Further research is needed to confirm these findings and their clinical implications.