PMID: 590569Nov 1, 1977

Adaptational characteristics of muscle stretch receptors of the dynamic type

Fiziologicheskiĭ zhurnal SSSR imeni I. M. Sechenova
I M Gorbunova, V I Zalkind


In cats with deefferented m. triceps, some stretch receptors of the dynamic type were shown to adapt rapidly after stretching of the muscle and keeping it at the new length, whereas other receptors revealed rapid and slow components of the adaptation. The units with different kinds of adaptation coexist in the same muscle, their afferents being related mainly to the group I, although overlapping with the group II afferents does exist. The above differences are revealed at high values of the muscle initial stretch. It seems that the adaptation slow component is based on a mechanical factor depending on the viscous-elastic properties of the tissue in the area of sensitive nerve terminals.

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