Abstract
Objective: The objective of the study was to investigate the haemodynamics of blood flow through the V3 region of the vertebral artery contralateral to the side manipulated during different rotary head positions and post cervical spinal manipulation. Methods: This quasi-experimental study was performed on 25 healthy, asymptomatic participants, both male and female, between 20 to 30 years of age. Each participant presented with a C0/C1 or C1/C2 cervical facet restriction (as determined by motion palpation). Participation was voluntary and participants had no symptoms of vertebrobasilar artery insufficiency, or contra-indications to cervical spinal manipulation. Doppler ultrasound was used to measure vertebral artery blood flow (V3 region) haemodynamics, contralateral side of manipulation, as close to C1/C2 region as possible in four positions of cervical rotation (neutral, 45º, maximum, and post manipulation neutral)...