Objective. To examine fatigue induced changes in trunk muscle latencies following trunk muscle fatigue.
Design. A repeated measures within subject design.
Background. Trunk muscle responses to sudden movements is of interest in clinical biomechanics and motor control.
Methods. Electromyographic profiles were recorded from transversus abdominis (finewire), internal oblique, rectus abdominis and external oblique and longissimus at the level of the 3rd lumbar vertebrae bilaterally. Four asymptomatic subjects performed arm-raising task using a visual cue before and after an isometric fatiguing trunk extension task.
Results. Feed-forward responses were not detected in all muscles for every trial. In general, following fatigue trunk muscle onset latencies occur earlier (left, P=0.0016; right, P=0.0475).
Conclusions. Trunk muscle fatigue alters anticipatory postural adjustments in normal subjects. It remains unclear if there is a pattern for specific muscles changes between individuals and if these are reflected in individuals with low back pain.Relevance
Trunk muscle fatigue and altered trunk muscles latencies to movement perturbations have been associated with low back pain. These findings suggest that there may be a link between centrally mediated response to isometric muscle fatigue and anticipatory motor control strategies.
To read this article in full you will need to make a payment
Purchase one-time access:Academic & Personal: 24 hour online accessCorporate R&D Professionals: 24 hour online access
One-time access price info
- For academic or personal research use, select 'Academic and Personal'
- For corporate R&D use, select 'Corporate R&D Professionals'
Subscribe:Subscribe to Clinical Biomechanics
Already a print subscriber? Claim online access
Already an online subscriber? Sign in
Register: Create an account
Institutional Access: Sign in to ScienceDirect
- Biomechanical study of the programming of anticipatory postural adjustments associated with voluntary movement.J. Biomech. 1987; 20: 735-742
- Postural adjustments associated with rapid voluntary arm movements 1. Electromyographic data.J. Neurol. Neurosurg. Psychiat. 1984; 47: 611-622
- Effects of arm acceleration and behavioral conditions on the organization of postural adjustments during arm flexion.Exp. Brain. Res. 1987; 66: 257-270
- Inefficient muscular stabilization of the lumbar spine associated with low back pain, A motor control evaluation of transversus abdominis.Spine. 1996; 21: 2640-2650
- Feedforward contraction of transversus abdominis is not influenced by the direction of arm movement.Exp. Brain Res. 1997; 114: 362-370
- Altered trunk muscle recruitment in people with low back pain with upper limb movement at different speeds.Arch. Phys. Med. Rehab. 1999; 80: 1005-1012
- Altered abdominal muscle recruitment in patients with chronic back pain following specific exercise intervention.J. Orthop. Sports Phys. Therapy. 1998; 27: 114-124
- Churchill Livingstone, Edinburgh1999: 191 Therapeutic exercise for spinal segmental stabilization in low back pain.
- Do anticipatory postural adjustments occurring in different segments of the postural chain follow the same organisational rule for different task movement velocities independently of the inertial load value?.Exp. Brain Res. 2000; 132: 79-86
- Anticipatory postural adjustments during self-paced and reaction-time movements.Exp. Brain Res. 1998; 121: 7-19
- Acquisition of anticipatory postural adjustments in a bimanual load-lifting task: normal and pathological aspects.Exp. Brain Res. 1999; 128: 229-235
- Posturo-kinetic organisation during the early phase of voluntary upper limb movement. 1. Normal subjects.J. Neurol. Neurosurg. Psychiat. 1988; 51: 956-965
- Isometric back extension endurance tests: a review of the literature.J. Manip. Physiol. Ther. 2001; 24: 110-122
- Spinal and supraspinal factors in human muscle fatigue.Physiol. Rev. 2001; 81: 1725-1789
- Muscle fibre orientation of abdominal muscles and suggested surface EMG electrode positions.Electromyogr. Clin. Neurophysiol. 1998; 38: 51-58
- Quantitative intramuscular myoelectric activity of lumbar portions of psoas and the abdominal wall during a wide variety of tasks.Med. Sci. Sports Exerc. 1998; 30: 301-310
- Trunk muscle fatigue during back extension in standing.Manual Ther. 2001; 6: 221-228
- Two methods for determining trunk extensor endurance. A comparative study.Eur. J. Appl. Physiol. Occup. Physiol. 1986; 55: 639-644
- Directional specificity of postural muscles in feed-forward postural reactions during fast voluntary arm movements.Exp. Brain Res. 1995; 103: 323-332
- Are amplitude and duration of anticipatory postural adjustments identically scaled to focal movement parameters in humans?.Neurosci. Lett. 2000; 278: 153-156
- Modulation of simple reaction time on the background of an oscillatory action: implications for synergy organization.Exp. Brain Res. 2000; 131: 85-100
- Psychomotor speed and postural control in chronic low back pain patients. A controlled follow-up study.Spine. 1996; 21: 2621-2627
- The role of motor action in anticipatory postural adjustments studied with self-induced and externally triggered perturbations.Exp. Brain Res. 1995; 106: 291-300
Accepted: April 10, 2002
Received: December 18, 2001
© 2002 Elsevier Science Ltd. Published by Elsevier Inc. All rights reserved.