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Related Concept Videos

Cross-bridge Cycle01:26

Cross-bridge Cycle

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As muscle contracts, the overlap between the thin and thick filaments increases, decreasing the length of the sarcomere—the contractile unit of the muscle—using energy in the form of ATP. At the molecular level, this is a cyclic, multistep process that involves binding and hydrolysis of ATP, and movement of actin by myosin.
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Overview of Skeletal Muscle01:15

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Skeletal muscles are composed of a bundle of muscle fibers and are attached to bones through tendons. Each skeletal muscle fiber is a single muscle cell. The sarcolemma, the plasma membrane of a skeletal muscle cell, consists of a lipid bilayer and glycocalyx that supports muscle fibers. The sarcolemma extends into the muscle cells to form tubular structures called transverse or T-tubules. Each side of the T-tubules consists of a membrane-bound structure called the sarcoplasmic reticulum,...
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The nervous system consists of complex motor neuron circuits, including upper motor neurons originating from the cerebral cortex and lower motor neurons starting in the spinal cord, coordinating both voluntary and involuntary movements. Among these, somatic motor neurons activate skeletal muscles and are classified into alpha, beta, and gamma types. Alpha neurons are vital for voluntary movement coordination, while gamma neurons adjust muscle spindle sensitivity, and the function of beta...
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Skeletal muscle is the most abundant type of muscle in the body. Tendons are the connective tissue that attaches skeletal muscle to bones. Skeletal muscles pull on tendons, which in turn pull on bones to carry out voluntary movements.
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Cellular needs and conditions vary from cell to cell and change within individual cells over time. For example, the required enzymes and energetic demands of stomach cells are different from those of fat storage cells, skin cells, blood cells, and nerve cells. Furthermore, a digestive cell works much harder to process and break down nutrients during the time that closely follows a meal compared with many hours after a meal. As these cellular demands and conditions vary, so do the amounts and...
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Excitation-Contraction Coupling in Skeletal Muscles01:20

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Excitation-contraction coupling is a series of events that occur between generating an action potential and initiating a muscle contraction. It occurs at the triad, a structure found in skeletal muscle fibers that comprise a T-tubule and terminal cisternae of the sarcoplasmic reticulum on each side. These triads are visible in longitudinally sectioned muscle fibers. They are typically located at the A-I junction — the junction between the A and I bands of the sarcomere.
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Understanding Brain-Skeletal Muscle Crosstalk Impacting Metabolism and Movement.

Bhanu P Jena1,2,3,4, Lars Larsson4,5, Domenico L Gatti4,6

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The brain and skeletal muscle coordinate metabolism and movement, crucial for survival. New technologies enable a new field,

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Area of Science:

  • Systems biology
  • Neuroscience
  • Exercise physiology
  • Mitochondrial biology
  • Molecular motors

Background:

  • Metabolism and movement are vital for organismal survival and success.
  • The brain and skeletal muscle are key regulators, involving mitochondria and myosin.
  • Independent study of brain and muscle has a long history, but their coordinated roles are unclear.

Purpose of the Study:

  • To understand the coordinated involvement of the brain and skeletal muscle in metabolism and movement.
  • To establish a new interdisciplinary field: 'Science and Engineering of Metabolism and Movement'.
  • To leverage recent technological and computational advances for systems-level insights.

Main Methods:

  • The article discusses the design and approach for a new field of study.
  • It highlights the integration of new tools, technologies, and computational approaches.
  • Machine learning and advanced computing power are central to the proposed methodology.

Main Results:

  • The coordinated roles of brain and skeletal muscle in metabolism and movement are poorly understood.
  • A new field offers the potential for substantial new insights into systems-level regulation.
  • This approach promises breakthroughs in understanding life processes and disease mechanisms.

Conclusions:

  • Understanding brain-skeletal muscle coordination in metabolism and movement is critical.
  • The proposed 'Science and Engineering of Metabolism and Movement' field is timely and promising.
  • This interdisciplinary approach can advance disease detection and therapeutic strategies.