ArticleGeroScience2026
Effects of aging on transmission from Ia afferents to α-motoneurons and presynaptic mechanisms across muscle lengths and contraction types.
Article in GeroScience, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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7 authors.
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Abstract
Presynaptic inhibition of Ia afferents, particularly via primary afferent depolarization (PAD), plays a crucial role in modulating transmission from Ia afferents to α-motoneurons according to task demands. In young adults, PAD is enhanced during eccentric contractions and at longer muscle lengths, supporting adaptable motor control. However, aging is associated with reduced muscle spindle sensitivity, which may impair the regulation of presynaptic inhibition via PAD. This study investigated whether aging alters the modulation of PAD according to contraction type and muscle length. Nineteen older adults (69 ± 4 years) and 16 young adults (23 ± 2 years) participated in three experimental sessions. The maximal H-reflex (H
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