TY - JOUR
T1 - Changes in Vertebral Artery Blood Flow in Different Head Positions and Post–Cervical Manipulative Therapy
AU - Yelverton, Christopher
AU - Wood, Jessica Joy
AU - Petersen, Diana Lopes
AU - Peterson, Cynthia
N1 - Publisher Copyright:
© 2020
PY - 2020/2
Y1 - 2020/2
N2 - Objective: The objective of this study was to investigate the hemodynamics 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 and 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 contraindications to cervical spinal manipulation. Doppler ultrasound was used to measure vertebral artery blood flow (V3 region) hemodynamics, contralateral side of manipulation, as close to C1/C2 region as possible in 4 positions of cervical rotation (neutral, 45°, maximum, and post-manipulation neutral). Doppler ultrasound parameters included peak systolic flow velocity, end diastolic flow velocity, mean flow velocity, vessel diameter, and flow rate. The nonparametric Friedman test was used for analysis across each head and neck position, and post manipulation. Results: No clinical or statistically significant results (P > .05) were found for any of the hemodynamic parameters in any of the head positions. Conclusions: Hemodynamic measurements of the V3 region of the vertebral artery do not show significant changes in the measured head positions or following manipulation of the upper cervical spine in patients without pre-existing risk factors.
AB - Objective: The objective of this study was to investigate the hemodynamics 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 and 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 contraindications to cervical spinal manipulation. Doppler ultrasound was used to measure vertebral artery blood flow (V3 region) hemodynamics, contralateral side of manipulation, as close to C1/C2 region as possible in 4 positions of cervical rotation (neutral, 45°, maximum, and post-manipulation neutral). Doppler ultrasound parameters included peak systolic flow velocity, end diastolic flow velocity, mean flow velocity, vessel diameter, and flow rate. The nonparametric Friedman test was used for analysis across each head and neck position, and post manipulation. Results: No clinical or statistically significant results (P > .05) were found for any of the hemodynamic parameters in any of the head positions. Conclusions: Hemodynamic measurements of the V3 region of the vertebral artery do not show significant changes in the measured head positions or following manipulation of the upper cervical spine in patients without pre-existing risk factors.
KW - Blood Flow Velocity
KW - Chiropractic
KW - Hemodynamics
KW - Manipulation, Spinal
KW - Vertebrobasilar Insufficiency
UR - http://www.scopus.com/inward/record.url?scp=85085604409&partnerID=8YFLogxK
U2 - 10.1016/j.jmpt.2019.09.001
DO - 10.1016/j.jmpt.2019.09.001
M3 - Article
C2 - 32482436
AN - SCOPUS:85085604409
SN - 0161-4754
VL - 43
SP - 144
EP - 151
JO - Journal of Manipulative and Physiological Therapeutics
JF - Journal of Manipulative and Physiological Therapeutics
IS - 2
ER -