ArticleJournal of neurophysiology2019
Human motor unit characteristics of the superior trapezius muscle with age-related comparisons.
Article in Journal of neurophysiology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed, 23 citations in OpenAlex.
- The Neuromuscular Junction: A Shared Vulnerability in Aging and Disease.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025Review
- Investigating the Association Between Central Sensitization and Breathing Pattern Disorders.Biomedicines · 2025Article
- Skeletal muscle dysfunction with advancing age.Clinical science (London, England : 1979) · 2024Review
- Reductions in Motor Unit Firing are Associated with Clinically Meaningful Leg Extensor Weakness in Older Adults.Calcified tissue international · 2024Review
- Effects of short-term unloading and active recovery on human motor unit properties, neuromuscular junction transmission and transcriptomic profile.The Journal of physiology · 2022Article
- Estimates of persistent inward currents are reduced in upper limb motor units of older adults.The Journal of physiology · 2021Article
Corrections and comments
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Authors and funding
5 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Current understanding of human motor unit (MU) control and aging is mostly derived from hand and limb muscles that have spinal motor neuron innervations. The aim here was to characterize and test whether a muscle with a shared innervation supply from brainstem and spinal MU populations would demonstrate similar age-related adaptations as those reported for other muscles. In humans, the superior trapezius (ST) muscle acts to elevate and stabilize the scapula and has primary efferent supply from the spinal accessory nerve (cranial nerve XI) located in the brainstem. We compared electrophysiological properties obtained from intramuscular and surface recordings between 10 young (22-33 yr) and 10 old (77-88 yr) men at a range of voluntary isometric contraction intensities (from 15 to 100% of maximal efforts). The old group was 41% weaker with 43% lower MU discharge frequencies compared with the young (47.2 ± 9.6 Hz young and 26.7 ± 5.8 Hz old,
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