Study Design. A a-month prospective study of neck mobility in patients with
acute whiplash injury and a control group with acute ankle distortion was
conducted.
Objectives. To assess active neck mobility after acute whiplash and ankle d
istortion injuries, and to relate neck mobility to headache, neck pain, and
speed of car at the time of collision.
Summary of background data. A major problem after whiplash injury is restri
ction of neck mobility immediately subsequent to trauma. It is, however, un
clear whether neck mobility changes after the acute injury are related to t
he associated headache and neck pain.
Methods. Cervical range of neck motion, neck pain, and headache were assess
ed after 1 week, then 1, 3, and 6 months after injury in 141 patients with
acute whiplash injury, and in 40 patients with acute nonsport ankle distort
ion.
Results. Patients with whiplash injury had significantly reduced flexion, e
xtension, lateral flexion, and rotation of the neck immediately after injur
y, as compared with patients with ankle distortion injury. Neck mobility, h
owever, was similar in the two groups after 3 months. In patients with whip
lash injury, neck pain and neck mobility were found to be related inversely
to reported headache and neck mobility. Neck mobility was not significantl
y related to a difference in car speed at the time of collision.
Conclusions. Neck mobility is reduced immediately after, but not 3 months a
fter, a whiplash trauma. Headache and neck mobility are related inversely a
nd neck pain and neck mobility are related inversely during the first 6 mon
ths after acute whiplash injury.