Publications
288 results found
Laheru D, Kerr JC, McGregor AH, 2007, Assessing hip abduction and adduction strength: Can greater segmental fixation enhance the reproducibility?, ARCHIVES OF PHYSICAL MEDICINE AND REHABILITATION, Vol: 88, Pages: 1147-1153, ISSN: 0003-9993
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- Citations: 11
Goodson A, McGregor AH, Douglas J, et al., 2007, Direct, quantitative clinical assessment of hand function: Usefulness and reproducibility, MANUAL THERAPY, Vol: 12, Pages: 144-152, ISSN: 1356-689X
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- Citations: 35
McGregor AH, Patankar ZS, Bull AMJ, 2007, Longitudinal changes in the spinal kinematics of oarswomen during step testing, Journal of Sports Science and Medicine, Vol: 6, Pages: 29-35, ISSN: 1303-2968
McGregor AH, Burton AK, Sell P, et al., 2007, The development of an evidence-based patient booklet for patients undergoing lumbar discectomy and un-instrumented decompression, EUROPEAN SPINE JOURNAL, Vol: 16, Pages: 339-346, ISSN: 0940-6719
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- Citations: 37
Abdalla S, McGregor AH, Strutton PH, 2007, Time course of trunk extensor muscle fatigue as measured using dynamometry and electromyography, ISOKINETICS AND EXERCISE SCIENCE, Vol: 15, Pages: 225-231, ISSN: 0959-3020
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- Citations: 2
Crowther A, McGregor AH, Strutton PH, 2007, Testing isometric fatigue in the trunk muscles, ISOKINETICS AND EXERCISE SCIENCE, Vol: 15, Pages: 91-97, ISSN: 0959-3020
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- Citations: 4
Anjarwalla NK, Brown LC, McGregor AH, 2007, The outcome of spinal decompression surgery 5 years on, European Spine Journal, Vol: 16, Pages: 1842-1847
O'Donovan O, Cheung J, Catley M, et al., 2006, An investigation of leg and trunk strength and reaction times of hard-style martial arts practitioners, JOURNAL OF SPORTS SCIENCE AND MEDICINE, Vol: 5, Pages: 5-12, ISSN: 1303-2968
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- Citations: 39
McGregor AH, Dicken B, Jamrozik K, 2006, National audit of post-operative management in spinal surgery, BMC MUSCULOSKELETAL DISORDERS, Vol: 7
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- Citations: 41
Steer RR, McGregor AH, Bull AMJ, 2006, A comparison of kinematics and performance measures of two rowing ergometers, JOURNAL OF SPORTS SCIENCE AND MEDICINE, Vol: 5, Pages: 52-59, ISSN: 1303-2968
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- Citations: 32
Bateman AH, McGregor AH, Bull AMJ, et al., 2006, Assessment of the timing of respiration during rowing and its relationship to spinal kinematics, BIOLOGY OF SPORT, Vol: 23, Pages: 353-365, ISSN: 0860-021X
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- Citations: 8
Corin G, Strutton PH, McGregor AH, 2005, Establishment of a protocol to test fatigue of the trunk muscles, BRITISH JOURNAL OF SPORTS MEDICINE, Vol: 39, Pages: 731-735, ISSN: 0306-3674
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- Citations: 25
Glover W, McGregor A, Sullivan C, et al., 2005, Work-related musculoskeletal disorders affecting members of the Chartered Society of Physiotherapy, CSP Congress 2004, Publisher: ELSEVIER SCI LTD, Pages: 138-147, ISSN: 0031-9406
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- Citations: 106
Kuppuswamy A, Theodorou S, Catley M, et al., 2005, Motor neurone excitability in back muscles assessed using mechanically evoked reflexes in spinal cord injured patients, JOURNAL OF NEUROLOGY NEUROSURGERY AND PSYCHIATRY, Vol: 76, Pages: 1259-1263, ISSN: 0022-3050
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- Citations: 6
McGregor AH, Wragg P, Bull AMJ, et al., 2005, Cervical spine mobilizations in subjects with chronic neck problems: An interventional MRI study, Journal of Back and Musculoskeletal Rehabilitation, Vol: 18, Pages: 21-28, ISSN: 1053-8127
Manual therapists frequently use posteroanterior mobilisation as both an examination tool and a form of conservative treatment. At present our knowledge of the principles underlying this technique are scant. This study aimed to investigate changes in vertebral kinematics and soft tissue displacement as a result of a sustained posteroanterior (PA) mobilisation applied to the cervical spine of a subject with a history of chronic neck pain.Five subjects were recruited and written informed consent obtained. Subjects were scanned using a General Electric Signa SPI0 Open Interventional MRI scanner. Subjects were scanned in the prone position with their necks in both neutral and flexed positions. In each position a PA mobilisation to the 2nd and 6th cervical vertebrae was performed. Sagittal images of the spine were obtained prior to, during and following the mobilisation, from which measures of vertebral angulation and translation were recorded. Measurements of intervertebral angulation and translation demonstrated little if any motion during the application of a PA mobilisation. Marked and significant changes were seen in terms of soft tissue compression and in some instances overall angulation of the cervical spine.These initial studies suggest that the application of a PA mobilisation to the cervical spine produces minimal if any intervertebral motion. This is in agreement with earlier studies investigating motion in healthy normal spines.
McGregor AH, Patankar ZS, Bull AMJ, 2005, Spinal kinematics in elite oarswomen during a routine physiological "step test", MEDICINE AND SCIENCE IN SPORTS AND EXERCISE, Vol: 37, Pages: 1014-1020, ISSN: 0195-9131
Spinal Kinematics in Elite Oarswomen during a Routine Physiological“Step Test.” Med. Sci. Sports Exerc., Vol. 37, No. 6, pp. 1014 –1020, 2005. Introduction: Biomechanical measures of movement arebeing used increasingly to understand injury mechanisms and enhance performance. Frequently, rowing injuries are attributed to poorrowing technique. This suggests a need to understand technique and its influencing factors. This study aimed to quantify rowingtechnique in terms of lumbopelvic motion, force production, and work done at different work intensities. Methods: An electromagneticmotion measuring device in conjunction with a load cell was used to determine the ergometer rowing kinematics of 12 elite internationaloarswomen during a routine step test. This test comprised six steps at a series of different stroke ratings starting at 18 strokes per minuteand ending at maximal-output rowing. Results: As work intensity increased, force output increased significantly (P 0.0001). Strokelength remained relatively consistent throughout the steps, although there was a nonsignificant shortening from 136.5 cm (6.4 SD)at 18 strokes per minute to 130.6 cm (8.1) at maximal testing. Changes in kinematics were also observed, particularly at the catchand finish positions. There was a trend towards less anterior pelvic rotation occurring at the catch with an associated reduction in lumbarrotation and greater extensions occurring in both at the finish at the higher rating. Overall, rowers underutilized pelvic rotation toachieve these positions relying predominately on lumbar rotation. Conclusion: This study quantified the spinal kinematics of eliterowers at different incremental work intensities and noted subtle but important changes to lumbopelvic and spinal kinematics atincreasing work levels, particularly at maximal intensity. Such changes particularly are thought to be important with respect to thedevelopment of low-back pain.
Lee RYW, McGregor AH, Bull AMJ, et al., 2005, Dynamic response of the cervical spine to posteroanterior mobilisation, CLINICAL BIOMECHANICS, Vol: 20, Pages: 228-231, ISSN: 0268-0033
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- Citations: 43
Waddell G, Sell P, McGregor A, et al., 2005, Your back operation, Norwich, Publisher: TSO
Strutton PH, Catley M, Theodorou S, et al., 2005, Corticospinal excitability in patients with chronic low back pain, Journal of Spinal Disorders and Techniques, Vol: 18, Pages: 420-424
Hill AM, McGregor AH, Wragg P, et al., 2005, The assessment of cervical spine kinematics: a comparison of iMR and conventional radiographic techniques, Journal of Back and Musculoskeletal Rehabilitation, Vol: 18, Pages: 29-35
Dietrich S, Bull AMJ, Leher A, et al., 2005, The prevalence of craniomandibular disorders (cmd) in male competitive rowers., J. Musculoskeletal Res., Vol: 9, Pages: 35-43
Hill AM, Pramanik S, McGregor AH, 2005, Isokinetic dynamometry in assessment of external and internal axial rotation strength of the shoulder: comparison of two positions, Isokinetics and Exercise Science, Vol: 13, Pages: 187-195
Fleming JC, McGregor AH, 2005, Forearm muscle profiles in tennis players, ISOKINETICS AND EXERCISE SCIENCE, Vol: 13, Pages: 147-151, ISSN: 0959-3020
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- Citations: 3
McGregor AH, Wragg P, Bull AMJ, et al., 2005, Cervical spine mobilisations in subjects with chronic neck problems: An interventional MRI study., Journal of Back & Musculoskeletal Rehabilitation, Vol: 18
Strutton PH, Beith ID, Theodorou S, et al., 2004, Corticospinal activation of internal oblique muscles has a strong ipsilateral component and can be lateralised in man, EXPERIMENTAL BRAIN RESEARCH, Vol: 158, Pages: 474-479, ISSN: 0014-4819
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- Citations: 47
McGregor AH, Bull AMJ, Byng-Maddick R, 2004, A comparison of rowing technique at different stroke rates: A description of sequencing, force production and kinematics, INTERNATIONAL JOURNAL OF SPORTS MEDICINE, Vol: 25, Pages: 465-470, ISSN: 0172-4622
Low back pain is the commonest musculoskeletal complaint in rowers. Research into the relationship between rowing technique, the forces generated during the rowing stroke and the kinematics of spinal motion are increasing, but to date none have investigated the impact of different rowing intensities on this relationship. A technique has been developed using an electromagnetic motion system and strain gauge instrumented load cell to measure spinal and pelvic motion and force generated at the handle during rowing on an exercise rowing ergometer. Using this technique ten collegiate male rowers (mean age 22.1 ± 2.8 years) from local rowing clubs were investigated. The test protocol consisted of rowing on an ergometer at three different stroke ratings; 17 - 20 strokes per minute; 24 - 28 strokes per minute; and 28 - 36 strokes per minute. Each rating was held for four minutes, with a five-minute rest between each rating. Marked changes in the force output curve and lumbopelvic kinematics were observed at the different rowing intensities. Although there was no change in the magnitude of peak torque generated during the different rating, there was a marked shift in when this occurred during the stroke. In terms of kinematic changes, these centred around changes in pelvic rotation at the catch and finish stages of the stroke with significantly less anterior rotation occurring at the catch position at higher rowing intensities. To conclude, this study suggests that rowing kinematics and force profiles do change at higher rowing intensities. These changes may be an important factor with respect to injury mechanisms, however, further work is required at an elite level.
McGregor AH, Bull AMJ, Lee R, et al., 2004, Dynamic response of the human spine to anteroposterior mobilisation manual therapy: an interventional magnetic resonance imaging study (short communication), Physiotherapy, Vol: 90, Pages: 165-166, ISSN: 0031-9406
ObjectivesThe biomechanics of posteroanterior mobilisation (PA) is poorly understood. Studies to date have recorded static spinal kinematics but have failed to quantify the force applied during the technique. The aims of this study were to develop and validate a tool to measure the force applied to the cervical spine during the administration of PA manual therapy.Study populationNineteen control subjects (10 males, 9 females, mean age 29.1 (S.D. 6.2) years) with no history of cervical pain requiring intervention were recruited into this study and written informed consent obtained.MethodsDevice developmentThe force measurement device had to be MR compatible, give the correct feel to the examiner to simulate the normal PA manipulation technique, easy to read from within the iMR suite by the examiner, calibrated for specific levels of force application and the force values had to be recorded simultaneously with the MR images. The design of the device was fraught with complexities relating to obtaining a precise measure of force, and the magnetic environment. A simple low cost approach was used to address this problem and a fluid-filled device was constructed that could be placed between the therapists hands and the subjects neck. Synchronisation was achieved by videoing the whole test procedure and logging this video with the image sequence number and time of scanning. Although a working system was achieved the device developed was found to be limited with respect to recording absolute force and consequently the values of force recorded were lower than expected, and the extraction of force data from the videos time consuming and complex.Imaging protocolSubjects were scanned using a General Electric Signa SP10 Interventional MRI scanner (iMR) at St. Mary’s Hospital, London. This is an open MRI scanner consisting of two connected but opposing ring “doughnut” magnets. The gap between these magnets is 56 cm generating a uniform field of 0.5 T. Subjects we
Datta G, Gnanalingham KK, Peterson D, et al., 2004, Back pain and disability after lumbar laminectomy: Is there a relationship to muscle retraction?, NEUROSURGERY, Vol: 54, Pages: 1413-1420, ISSN: 0148-396X
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- Citations: 93
McGregor AH, Rylands H, Owen A, et al., 2004, Does preoperative hip rehabilitation advice improve recovery and patient satisfaction?, JOURNAL OF ARTHROPLASTY, Vol: 19, Pages: 464-468, ISSN: 0883-5403
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- Citations: 66
Shih YF, Bull AMJ, McGregor AH, et al., 2004, Active patellar tracking measurement - A novel device using ultrasound, AMERICAN JOURNAL OF SPORTS MEDICINE, Vol: 32, Pages: 1209-1217, ISSN: 0363-5465
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- Citations: 30
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