Active head and cervical range of motion: effect of age in healthy females.

Study Design: A study on active cervical range of motion (RoM) in healthy females of different ages.

Objective: Perform a three-dimensional quantitative analysis of active head-cervical RoM in healthy females to assess the relationship with age.

Summary Of Background Data: Age-related variations in active cervical RoM are still partially unknown: some investigations demonstrated that age has no effect whatsoever on the primary movements, whereas other studies found an inverse proportionality between age and cervical RoM.