Load moments and myoelectric activity when the cervical spine is held in full flexion and extension.
D000328:Adult; D002574:Cervical Vertebrae / Q000502:physiology*; D004576:Electromyography; D005260:Female; D006801:Humans; D008875:Middle Aged; D009119:Muscle Contraction; D009132:Muscles / Q000502:physiology*; D009334:Neck Muscles / Q000502:physiology*; D005082:Physical Exertion; D011187:Posture