However, it has been argued that the relative change in head posture will not impact on postural stability because the otolith signals generated in different head postures are integrated with other balance-related sensory inputs to maintain adequate postural stability (Hamid 1994).
Any alteration in head posture with respect to horizontal ground surface will affect this optimal working range and hence affect the postural stability (Brandt et al 1981).
These results would suggest any pathology of the cervical spine that in the short term results in a more retracted or forward head posture is unlikely to impact on postural stability.
These results add to the body of knowledge regarding change in head posture and postural stability at least in healthy young male adults.
It will also be important to explore the relationship between postural stability and head posture (protrusion and retraction) in both male and female adults across the age spectrum as the results of this study were confined to healthy young adult males.
Hanten WP, Lucio RM, Russell JL and Brunt D (1991): Assessment of total head excursion and resting head posture.
Paris SV (1990): Cervical symptoms of forward head posture.
who showed that differences in postural stability in both normal subjects and patients with neck pain were elicited when the head was held in extension but not in the neutral and flexion head postures (Kogler et al 2000).
Abbreviations: AHT = anterior head translation, C2 = second cervical (vertebra), C7 = seventh cervical (vertebra), CI = confidence interval, CV = craniovertebral, EHPI = Electronic Head Posture Instrument, FHP = forward head posture, HPSCI = Head Posture Spinal Curvature Instrument, ICC = intraclass correlation coefficient, NPQ = Northwick Park Questionnaire, NPRS = Numeric Pain Rating Scale.
The Electronic Head Posture Instrument (EHPI) is a simple and convenient device developed to help clinicians measure the head-neck posture of patients with long-term mechanical neck pain.
The relationship between head posture and severity and disability of patients with neck pain.
The interaction of wearing multifocal lenses with head posture and pain.
Cervical headache: An investigation of natural head posture and upper cervical flexor muscle performance.
Relationship of forward head posture and cervical backward bending to neck pain.
Head posture and neck pain of chronic nontraumatic origin: A comparison between patients and pain-free persons.