Abstract
AMONG muscle spindles, those in snake and lizard are the simplest in structure, consisting of a single intrafusal muscle fibre innervated by a single sensory and several motor nerve fibres. Two varieties of spindle occur: one type, the long-capsule spindle has a longer and more slender capsule than the other, the short-capsule spindle1. They differ in their responses to stretch; the response of the long-capsule spindle depends mainly on degree of stretch while the short-capsule spindle responds both to velocity and amplitude of stretch2–4.
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FUKAMI, Y. Receptor potential and impulse initiation in two varieties of reptilian muscle spindle. Nature 257, 240–241 (1975). https://doi.org/10.1038/257240a0
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DOI: https://doi.org/10.1038/257240a0
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