What question did this study set out to answer?

To evaluate the hypothesis that electrical impulses travel internally from the sarcolemma to contractile fibrils via the sarcoplasmic reticulum.

March 13, 1959Science

Intracellular Impulse Conduction in Muscle Cells

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Authors

LPLee D. PeacheyUniversity of the Sciences KPKeith R. PorterUniversity of Colorado Boulder

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Implication

Morphological analysis reveals structural links between sarcoplasmic reticulum organization and contraction speed in muscle cells, indicating an internal pathway for impulse conduction.

Key Points

To evaluate the hypothesis that electrical impulses travel internally from the sarcolemma to contractile fibrils via the sarcoplasmic reticulum.
Examined comparative morphological data on sarcoplasmic reticulum organization and cell dimensions in relation to contraction speed across smooth and striated muscle.
Evaluated structural relationships between the sarcolemma and contractile fibrils in the striated muscle of amphioxus.
Correlations between reticulum morphology, muscle cell size, and contraction speed across muscle classes qualitatively support the internal conduction hypothesis.
Identified distinct morphological connections between the sarcolemma and contractile fibrils in amphioxus striated muscle that provide additional structural evidence for impulse propagation.

Cite This Study

Peachey et al. (1959) studied this question.

synapsesocial.com/papers/6a709dbcf44fa9f079de4a01 https://doi.org/10.1126/science.129.3350.721

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Implication

Morphological analysis reveals structural links between sarcoplasmic reticulum organization and contraction speed in muscle cells, indicating an internal pathway for impulse conduction.

Intracellular Impulse Conduction in Muscle Cells

Discussion

Member takes

Implication

Key Points

Cite This Study

Intracellular Impulse Conduction in Muscle Cells

Discussion

Member takes

Implication

Key Points

Cite This Study

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