Discharge behaviors of trapezius motor units during exposure to low and high levels of acute psychosocial stress

Journal of Clinical Neurophysiology

Volumn 27, Issue 1, 2010, Pages 52-61

  Stephenson, Jennifer L ^a   Maluf, Katrina S ^a  

^a UNIVERSITY OF COLORADO   (United States)

Author keywords

Anxiety; Discharge rate modulation; EMG; Motoneuron; Muscle activation; Persistent inward current

Indexed keywords

ACUTE STRESS; ADULT; ANXIETY; ARTICLE; BLOOD PRESSURE; FEEDBACK SYSTEM; FEMALE; HUMAN; HUMAN EXPERIMENT; HYPERTENSION; MENTAL STRESS; MOTONEURON; MOTOR UNIT; MOTOR UNIT POTENTIAL; MUSCLE ACTION POTENTIAL; MUSCLE ISOMETRIC CONTRACTION; NEUROPHYSIOLOGICAL RECRUITMENT; NORMAL HUMAN; SOCIAL ASPECT; TACHYCARDIA; TASK PERFORMANCE; TRAPEZIUS MUSCLE; VOLUNTARY MOVEMENT;

ACUTE DISEASE; ADULT; ELECTROMYOGRAPHY; EVOKED POTENTIALS, MOTOR; FEMALE; HUMANS; ISOMETRIC CONTRACTION; MIDDLE AGED; MOTOR NEURONS; MUSCLE, SKELETAL; NEUROPSYCHOLOGICAL TESTS; SOCIAL BEHAVIOR; STRESS, PSYCHOLOGICAL; YOUNG ADULT;

EID: 76749111994     PISSN: 07360258     EISSN: None     Source Type: Journal    
DOI: 10.1097/WNP.0b013e3181cb81d3     Document Type: Article

References (77)

1. Alexander C, Miley R, Stynes S, et al. Differential control of the scapulothoracic muscles in humans. J Physiol. 2007;580:777-786.
2. Andersen JH, Kaergaard A, Mikkelsen S, et al. Risk factors in the onset of neck/shoulder pain in a prospective study of workers in industrial and service companies. Occup Environ Med. 2003;60:649-654.
3. Ariens GA, van Mechelen W, Bongers PM, et al. Psychosocial risk factors for neck pain: a systematic review. Am J Ind Med. 2001;39:180-193.
4. Bawa P, Calancie B. Repetitive doublets in human flexor carpi radialis muscle. J Physiol. 1983;339:123-132.
5. Bawa P, Pang MY, Olesen KA, et al. Rotation of motoneurons during prolonged isometric contractions in humans. J Neurophysiol. 2006;96:1135-1140.
6. Bennett DJ, Li Y, Harvey PJ, et al. Evidence for plateau potentials in tail motoneurons of awake chronic spinal rats with spasticity. J Neurophysiol. 2001;86:1972-1982. (Pubitemid 32953242)
7. Bernard BP. Musculoskeletal Disorders and Workplace Factors: A Critical Review of Epidemiologic Evidence for Work-Related Musculoskeletal Disorders of the Neck, Upper Extremity, and Low Back. Cincinnati, OH: U.S. Department of Health and Human Services, National Institute for Occupational Safety and Health; 1997. Publication No 97-178628.
8. Binder-Macleod SA, Barker CB III. Use of a catchlike property of human skeletal muscle to reduce fatigue. Muscle Nerve 1991;14:850-857.
9. Binder MD, Heckman CJ, Powers RK. The physiological control of motoneuron activity. In: Rowell LB, Shepherd JT, eds. Handbook of Physiology Section 12, Exercise: Regulation and Integration of Multiple Systems. New York: Oxford University Press; 1996:3-53.
10. Blangsted AK, Sogaard K, Christensen H, et al. The effect of physical and psychosocial loads on the trapezius muscle activity during computer keying tasks and rest periods. Eur J Appl Physiol. 2004;91:253-258.
11. Bongers PM, Ijmker S, van den Heuvel S, et al. Epidemiology of work related neck and upper limb problems: psychosocial and personal risk factors (part I) and effective interventions from a biobehavioural perspective (part II). J Occup Rehab. 2006;16:279-302.
12. Burke RE, Rudomin P, Zajac FE III. The effect of activation history on tension production by individual muscle units. Brain Res. 1976;109:515-529.
13. Calvin WH, Schwindt PC. Steps in production of motoneuron spikes during rhythmic firing. J Neurophysiol. 1972;35:297-310.
14. Christou EA, Jakobi JM, Critchlow A, et al. The 1- to 2-Hz oscillations in muscle force are exacerbated by stress, especially in older adults. J Appl Physiol. 2004;97:225-235.
15. Collins DF, Burke D, Gandevia SC. Large involuntary forces consistent with plateau-like behavior of human motoneurons. J Neurosci. 2001;21:4059-4065.
16. Collins DF, Burke D, Gandevia SC. Sustained contractions produced by plateaulike behaviour in human motoneurones. J Physiol. 2002;538:289-301.
17. Conway BA, Hultborn H, Kiehn O, et al. Plateau potentials in alpha-motoneurones induced by intravenous injection of L-dopa and clonidine in the spinal cat. J Physiol. 1988;405:369-384.
18. Cote P, Cassidy JD, Carroll L. The Saskatchewan Health and Back Pain Survey. The prevalence of neck pain and related disability in Saskatchewan adults. Spine. 1998;23:1689-1698. (Pubitemid 28433869)
19. De Luca CJ, Erim Z. Common drive of motor units in regulation of muscle force. Trends Neurosci. 1994;17:299-305.
20. Denslow JS. Double discharges in human motor units. J Neurophysiol. 1948;11: 209-215.
21. Dickerson SS, Kemeny ME. Acute stressors and cortisol responses: a theoretical integration and synthesis of laboratory research. Psychol Bull. 2004;130: 355-391.
22. Eken T. Spontaneous electromyographic activity in adult rat soleus muscle. J Neurophysiol. 1998;80:365-376.
23. Eken T, Kiehn O. Bistable firing properties of soleus motor units in unrestrained rats. Acta Physiol Scand. 1989;136:383-394.
24. Falla D, Farina D. Motor units in cranial and caudal regions of the upper trapezius muscle have different discharge rates during brief static contractions. Acta Physiol (Oxf). 2008a;192:551-558.
25. Falla D, Farina D. Non-uniform adaptation of motor unit discharge rates during sustained static contraction of the upper trapezius muscle. Exp Brain Res. 2008b;191:363-370.
26. Falla D, Farina D, Graven-Nielsen T. Spatial dependency of trapezius muscle activity during repetitive shoulder flexion. J Electromyogr Kinesiol. 2007;17:299-306.
27. Gorassini M, Yang JF, Siu M, et al. Intrinsic activation of human motoneurons: possible contribution to motor unit excitation. J Neurophysiol. 2002;87: 1850-1858.
28. Gorassini MA, Bennett DJ, Yang JF. Self-sustained firing of human motor units. Neurosci Lett. 1998;247:13-16.
29. Gorassini MA, Knash ME, Harvey PJ, et al. Role of motoneurons in the generation of muscle spasms after spinal cord injury. Brain. 2004;127:2247-2258.
30. Hagg GM. Static work loads and occupational myalgia-a new explanation model. In: Anderson PA, Hobart DJ, Danhoff JV, eds. Electromyographical Kinesiology. North-Holland: Elsevier Science Publishers; 1991:141-144.
31. Hamilton N, Luttgens K. Kinesiology: Scientific Basis of Human Motion. Boston, MA: McGraw-Hill; 2002.
32. Henneman E. Relation between size of neurons and their susceptibility to discharge. Science. 1957;126:1345-1347.
33. Holstege JC, Kuypers HG. Brainstem projections to spinal motoneurons: an update. Neuroscience. 1987;23:809-821.
34. Holte KA, Westgaard RH. Daytime trapezius muscle activity and shoulder-neck pain of service workers with work stress and low biomechanical exposure. Am J Ind Med. 2002;41:393-405.
35. Hounsgaard J, Hultborn H, Jespersen B, Kiehn O. Bistability of alpha-motoneurones in the decerebrate cat and in the acute spinal cat after intravenous 5-hydroxytryptohphan. J Physiol. 1988;405:345-367.
36. Kamen G, Sullivan R, Rubinstein S, et al. Evidence of self-sustained motoneuron firing in young and older adults. J Electromyogr Kinesiol. 2006;16:25-31.
37. Kernell D. The delayed depolarization in cat and rat motoneurones. Prog Brain Res. 1964;12:42-55.
38. Kiehn O, Eken T. Prolonged firing in motor units: evidence of plateau potentials in human motoneurons? J Neurophysiol. 1997;78:3061-3068.
39. Kudina LP, Alexeeva NL. Repetitive doublets of human motoneurones: analysis of interspike intervals and recruitment pattern. Electroencephalogr Clin Neurophysiol. 1992;85:243-247.
40. Kudina LP, Churikova LI. Testing excitability of human motoneurones capable of firing double discharges. Electroencephalogr Clin Neurophysiol. 1990;75: 334-341.
41. Laursen B, Jensen BR, Garde AH, et al. Effect of mental and physical demands on muscular activity during the use of a computer mouse and a keyboard. Scand J Work Environ Health. 2002;28:215-221.
42. Lee RH, Heckman CJ. Enhancement of bistability in spinal motoneurons in vivo by the noradrenergic alpha1 agonist methoxamine. J Neurophysiol. 1999;81: 2164-2174.
43. Lundberg U. Psychophysiology of work: stress, gender, endocrine response, and work-related upper extremity disorders. Am J Ind Med. 2002;41:383-392.
44. Lundberg U, Forsman M, Zachau G, et al. Effects of experimentally induced mental and physical stress on motor unit recruitment in the trapezius muscle. Work Stress. 2002;16:166-178.
45. Lundberg U, Kadefors R, Melin B, et al. Psychophysiological stress and EMG activity of the trapezius muscle. Int J Behav Med. 1994;1:354-370.
46. McLean L, Urquhart N. The influence of psychological stressors on myoelectrical signal activity in the shoulder region during a data entry task. Work Stress. 2002;16:138-153.
47. Nelson PG, Burke RE. Delayed depolarization in cat spinal motoneurons. Exp Neurol. 1967;17:16-26.
48. Nickolls P, Collins DF, Gorman RB, et al. Forces consistent with plateau-like behaviour of spinal neurons evoked in patients with spinal cord injuries. Brain. 2004;127:660-670.
49. Nilsen K, Sand T, Stovner L, et al. Autonomic and muscular responses and recovery to one-hour laboratory mental stress in healthy subjects. BMC Musculoskelet Disord. 2007;8:81.
50. Nilsen KB, Sand T, Borchgrevink P, et al. A unilateral sympathetic blockade does not affect stress-related pain and muscle activity in patients with chronic musculoskeletal pain. Scand J Rheumatol. 2008;37:53-61.
51. Noteboom JT, Barnholt KR, Enoka RM. Activation of the arousal response and impairment of performance increase with anxiety and stressor intensity. J Appl Physiol. 2001a;91:2093-2101.
52. Noteboom JT, Fleshner M, Enoka RM. Activation of the arousal response can impair performance on a simple motor task. J Appl Physiol. 2001b;91:821-831.
53. Ostergren PO, Hanson BS, Balogh I, et al. Incidence of shoulder and neck pain in a working population: effect modification between mechanical and psychosocial exposures at work? Results from a one year follow up of the Malmo shoulder and neck study cohort. J Epidemiol Community Health. 2005;59: 721-728.
54. Partanen VS, Lang AH. An analysis of double discharges in the human electromyogram. J Neurol Sci. 1978;36:363-375.
55. Picavet HS, Schouten JS. Musculoskeletal pain in the Netherlands: prevalences, consequences and risk groups, the DMC(3)-study. Pain. 2003;102:167-178.
56. Powers RK, Nardelli P, Cope TC. Estimation of the contribution of intrinsic currents to motoneuron firing based on paired motoneuron discharge records in the decerebrate cat. J Neurophysiol. 2008;100:292-303.
57. Proudfit HK, Clark FM. The projections of locus coeruleus neurons to the spinal cord. Prog Brain Res. 1991;88:123-141.
58. Schleifer LM, Spalding TW, Kerick SE, et al. Mental stress and trapezius muscle activation under psychomotor challenge: a focus on EMG gaps during computer work. Psychophysiology. 2008;45:356-365.
59. Sjogaard G, Sogaard K, Finsen L, et al. Doublets in motor unit activity of human forearm muscle during simulated computer work. Acta Physiol Pharmacol Bulg. 2001;26:83-85.
60. Sogaard K, Sjogaard G, Finsen L, et al. Motor unit activity during stereotyped finger tasks and computer mouse work. J Electromyogr Kinesiol. 2001;11: 197-206.
61. Spieberger CD. Manual for the State-Trait Anxiety Inventory. Palo Alto, CA: Consulting Psychologists Press, 1983.
62. Stephenson JL, Maluf KS. Effects of Psychosocial Stress on Intrinsic Activation of Human Trapezius Motoneurons. Washington, DC: Society for Neuroscience Abstracts; 2008.
63. Tsigos C, Chrousos GP. Hypothalamic-pituitary-adrenal axis, neuroendocrine factors and stress. J Psychosom Res. 2002;53:865-871.
64. Urwin M, Symmons D, Allison T, et al. Estimating the burden of musculoskeletal disorders in the community: the comparative prevalence of symptoms at different anatomical sites, and the relation to social deprivation. Ann Rheum Dis. 1998;57:649-655.
65. Valentino RJ, Van Bockstaele E. Convergent regulation of locus coeruleus activity as an adaptive response to stress. Eur J Pharmacol. 2008;583:194-203.
66. Van Cutsem M, Duchateau J, Hainaut K. Changes in single motor unit behaviour contribute to the increase in contraction speed after dynamic training in humans. J Physiol. 1998;513:295-305.
67. Veiersted KB, Westgaard RH, Andersen P. Electromyographic evaluation of muscular work pattern as a predictor of trapezius myalgia. Scand J Work Environ Health. 1993;19:284-290.
68. Visser B, De Looze M, De Graaff M, et al. Effects of precision demands and mental pressure on muscle activation and hand forces in computer mouse tasks. Ergonomics. 2004;47:202-217.
69. Walton C, Kalmar JM, Cafarelli E. Effect of caffeine on self-sustained firing in human motor units. J Physiol. 2002;545:671-679.
70. Westad C, Mork PJ, Westgaard RH. Firing patterns of low-threshold trapezius motor units in feedback-controlled contractions and vocational motor activities. Exp Brain Res. 2004;158:465-473.
71. Westad C, Westgaard RH, De Luca CJ. Motor unit recruitment and derecruitment induced by brief increase in contraction amplitude of the human trapezius muscle. J Physiol. 2003;552:645-656.
72. Westgaard RH. Muscle activity as a releasing factor for pain in the shoulder and neck. Cephalalgia. 1999;19(suppl 25):1-8.
73. Westgaard RH, Bonato P, Westad C. Respiratory and stress-induced activation of low-threshold motor units in the human trapezius muscle. Exp Brain Res. 2006;175:689-701.
74. Westgaard RH, De Luca CJ. Motor unit substitution in long-duration contractions of the human trapezius muscle. J Neurophysiol. 1999;82:501-504.
75. Westgaard RH, De Luca CJ. Motor control of low-threshold motor units in the human trapezius muscle. J Neurophysiol. 2001;85:1777-1781.
76. Westgaard RH, Vasseljen O, Holte KA. Trapezius muscle activity as a risk indicator for shoulder and neck pain in female service workers with low biomechanical exposure. Ergonomics. 2001;44:339-353.
77. Zajac FE, Young JL. Properties of stimulus trains producing maximum tensiontime area per pulse from single motor units in medial gastrocnemiu muscle of the cat. J Neurophysiol. 1980;43:1206-1220.