What does this research mean for the field?

Shortening of striated muscle is associated with a transformation of thin actin filaments into thick filaments in the A band, suggesting that muscle contraction is based on the interaction of actin and myosin to form a supercoiled structure. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

This research aims to explore the structural changes in striated muscle at different sarcomere lengths.

July 25, 1956The Journal of Cell BiologyOpen Access

The Ultrastructure of Striated Muscle at Various Sarcomere Lengths

View Full Paper

Ask AI

Bookmark

Population

Striated muscle

Comparison

Muscle shortening vs Rest and equilibrium length

Design

Preclinical

Authors

DSDavid SpiroNational Institutes of Health

Discussion

Member takes

Implication

Should not yet alter clinical muscle management; leaves open extension to human cardiac sarcomere dynamics.

Key Points

This research aims to explore the structural changes in striated muscle at different sarcomere lengths.
Examined rest and equilibrium length muscle sarcomeres.
Analyzed filament composition at varying lengths.
Discussed actin and myosin interaction during contraction.
Resting sarcomeres contain predominantly thin filaments that extend from Z membranes to the H band.
Shortening muscles show a transformation where thin filaments convert to thick filaments within the A band.
Contraction is explained through the formation of a supercoiled structure by actin and myosin.

Structured PICO

Population

Striated muscle

Intervention

Muscle shortening

Comparator

Rest and equilibrium length

Outcome

Ultrastructural changes in sarcomeressurrogate

Muscle shortening involves the transformation of thin into thick filaments in the A band, supporting a supercoiled structure model of actin-myosin interaction.

Cite This Study

David Spiro (1956) studied this question.

synapsesocial.com/papers/6a1d8a4da44061a0895dcc9f https://doi.org/10.1083/jcb.2.4.157

View Full Paper

Ask AI

Bookmark

The Ultrastructure of Striated Muscle at Various Sarcomere Lengths

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

The Ultrastructure of Striated Muscle at Various Sarcomere Lengths

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Also Consider

Also Consider