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. 1981 Oct;1(10):1069-74.
doi: 10.1523/JNEUROSCI.01-10-01069.1981.

Stretch-induced contraction of intrafusal muscle in cat muscle spindle

R E Poppele, D C Quick

Stretch-induced contraction of intrafusal muscle in cat muscle spindle

R E Poppele et al. J Neurosci. 1981 Oct.

Abstract

Measurements of tension, stiffness, and sarcomere length of intrafusal muscle during ramp stretch of isolated muscle spindles have revealed a stretch-induced contraction of the bag1 fiber. This behavior can account for the very high sensitivity of primary endings to stretch as well as the enhanced sensitivity evoked by dynamic fusimotor stimulation.

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