ArticleJournal of clinical neurophysiology : official publication of the American Electroencephalographic Society2010
Discharge behaviors of trapezius motor units during exposure to low and high levels of acute psychosocial stress.
Article in Journal of clinical neurophysiology : official publication of the American Electroencephalographic Society, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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Who cites it
17 citing papers in PubMed.
- Estimation of persistent inward currents contribution to inspiratory motoneuron firing in humans.The Journal of physiology · 2026Article
- The Cellular Basis for the Generation of Firing Patterns in Human Motor Units.Advances in neurobiology · 2022Article
- Nonlinear Input-Output Functions of Motoneurons.Physiology (Bethesda, Md.) · 2020Review
- Oscillations in neural drive and age-related reductions in force steadiness with a cognitive challenge.Journal of applied physiology (Bethesda, Md. : 1985) · 2019Article
- Intrinsic Laryngeal Muscle Response to a Public Speech Preparation Stressor.Journal of speech, language, and hearing research : JSLHR · 2018Article
- The potential for understanding the synaptic organization of human motor commands via the firing patterns of motoneurons.Journal of neurophysiology · 2017Review
- Psychosocial stress alters the strength of reticulospinal input to the human upper trapezius.Journal of neurophysiology · 2017Article
- Triplet firing origin in human motor units: emerging hypotheses.Experimental brain research · 2016Article
- Characterization of motor units in behaving adult mice shows a wide primary range.Journal of neurophysiology · 2014Article
- Modulation of intracortical inhibition in response to acute psychosocial stress is impaired among individuals with chronic neck pain.Journal of psychosomatic research · 2014Article
- Single motor unit firing behavior in the right trapezius muscle during rapid movement of right or left index finger.Frontiers in human neuroscience · 2014Article
- Double discharges in human soleus muscle.Frontiers in human neuroscience · 2013Article
- Delayed depolarization and firing behavior of human motoneurons during voluntary muscle contractions.Frontiers in human neuroscience · 2013Article
- Motoneuron double discharges: only one or two different entities?Frontiers in cellular neuroscience · 2013Article
- Effects of persistent inward currents, accommodation, and adaptation on motor unit behavior: a simulation study.Journal of neurophysiology · 2011Article
- Dependence of the paired motor unit analysis on motor unit discharge characteristics in the human tibialis anterior muscle.Journal of neuroscience methods · 2011Article
- Discharge rate modulation of trapezius motor units differs for voluntary contractions and instructed muscle rest.Experimental brain research · 2011Article
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2 authors.
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Abstract
This study investigated the effects of acute psychosocial stress on trapezius single motor unit discharge behaviors. Twenty-one healthy women performed feedback-controlled isometric contractions under conditions of low and high psychosocial stress in the same experimental session. Psychosocial stress was manipulated using a verbal math task combined with social evaluative threat that significantly increased perceived anxiety, heart rate, and blood pressure (P < 0.001). Motor unit discharge behaviors including the threshold and discharge rate at recruitment [7.7% (5.7%) maximal voluntary isometric contraction and 7.3 pulses per second (pps) (6.8 pps), P > 0.121, N = 103] and derecruitment [6.0% (4.4%) maximal voluntary isometric contraction and 6.5 pps (4.1 pps), P > 0.223, N = 99], the mean [11.3 pps (2.3 pps), P = 0.309, N = 106] and variability [2.5 pps (0.91 pps), P = 0.958, N = 106] of discharge rate, and the proportion of motor units exhibiting double discharges (21%, P = 0.446) did not change across stress conditions. Discharge rate modulation with changes in contraction intensity was highly variable and similar across stress conditions (P > 0.308, N = 89). Rate-rate modulation of concurrently active motor units was also highly variable (r = -0.84 to 1.00, N = 75). Estimates of DeltaF for motor unit pairs with rate-rate modulation >or=0.7 were positive and similar across stress conditions [4.7 pps (2.0 pps), P = 0.405, N = 16]. The results indicate that acute psychosocial stress does not alter trapezius motor unit discharge behaviors during a precisely controlled motor task in healthy women.
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