title: Colour Doppler sonographic analysis of blood-flow velocity in the human facial artery and changes in masseter muscle thickness during low-level static contraction.
abstract: Muscle oedema, which can be seen as a thickness increment by ultrasonography, is important in provoking pain and fatigue during low-level contraction. Although oedema is related to the balance of inflow and outflow of blood, there are no data on the correlation between muscle thickness change and blood-flow. Blood-flow velocities in the facial artery and the muscle thickness changes were measured by colour Doppler ultrasonography in 30 healthy volunteers during 20 min contraction with 10% of maximum force. Thickness and velocity changes both reached a peak in the initial phase of contraction. The initial change of thickness did not correlate with the velocity in the facial artery, while those immediately after exercise showed a high correlation. The velocity changes in the facial artery might depend on both the general response to contraction and local metabolic or mechanical factors in the contracted masseters.
authors.affiliation: Department of Oral and Maxillofacial Radiology, Aichi-Gakuin University School of Dentistry, 2-11 Suemori-dori, Chikusa-ku, 464-8651, Nagoya, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Ariji
authors.forename: S
authors.initials: S
authors.lastname: Sakuma
authors.forename: Y
authors.initials: Y
authors.lastname: Kimura
authors.forename: A
authors.initials: A
authors.lastname: Kawamata
authors.forename: M
authors.initials: M
authors.lastname: Toyama
authors.forename: K
authors.initials: K
authors.lastname: Kurita
authors.forename: Y
authors.initials: Y
authors.lastname: Ito
authors.forename: E
authors.initials: E
authors.lastname: Ariji
mesh_terms: D000293:Adolescent; D000328:Adult; D001158:Arteries; D001783:Blood Flow Velocity / Q000502:physiology; D004487:Edema / Q000503:physiopathology; D004576:Electromyography; D005145:Face / Q000098:blood supply*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008406:Masseter Muscle / Q000098:blood supply / Q000000981:diagnostic imaging* / Q000503:physiopathology; D009119:Muscle Contraction / Q000502:physiology*; D018763:Muscle Fatigue / Q000502:physiology; D010146:Pain / Q000503:physiopathology; D012039:Regional Blood Flow / Q000502:physiology; D018709:Statistics, Nonparametric; D014159:Transducers; D018615:Ultrasonography, Doppler, Color