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Related Concept Videos

Classification of Skeletal Muscle Relaxants01:28

Classification of Skeletal Muscle Relaxants

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Skeletal muscle relaxants are a group of drugs that can reduce muscle stiffness and induce temporary paralysis to relieve pain. These agents can act centrally to reduce muscle tone or spasms in painful conditions such as multiple sclerosis (MS), amyotrophic lateral sclerosis (ALS), or spinal injuries; they are called antispasmodics or spasmolytics.
Peripherally acting skeletal muscle relaxants interfere with the neurotransmission at the neuromuscular end plate to induce paralysis during...
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Motor Unit Stimulation01:20

Motor Unit Stimulation

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When the neuron of a motor unit fires an action potential, it triggers a series of events, leading to a twitch contraction in the muscle fibers. The process of excitation-contraction coupling is crucial in relaying the action potential to the muscle fibers.
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
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Somatic Spinal Reflexes01:22

Somatic Spinal Reflexes

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Somatic spinal reflexes are rapid, involuntary muscular responses to external stimuli that involve the somatic musculature and the spinal cord.
One of the most well-known somatic spinal reflexes is the stretch reflex, which is activated by the sudden stretching of a muscle. This reflex involves the activation of specialized sensory receptors called muscle spindles, which are located in the muscle tissue and detect changes in the length and speed of muscle contractions. When a muscle is suddenly...
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Peripherally and Centrally Acting Muscle Relaxants: A Comparison01:09

Peripherally and Centrally Acting Muscle Relaxants: A Comparison

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Skeletal muscle relaxants can target the central nervous system [CNS] to reduce muscle tension or act directly at the neuromuscular junction to induce temporary paralysis. These two classes of muscle relaxants are called centrally acting muscle relaxants and peripherally acting muscle relaxants. They differ in their action, mechanism, administration route, and clinical uses.
Centrally acting muscle relaxants can be further divided into spasmolytic and antispasmodic drugs. Spasmolytic...
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Skeletal Muscle Relaxants: Therapeutic Uses01:31

Skeletal Muscle Relaxants: Therapeutic Uses

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Skeletal muscle relaxants are used to relax muscle tone and alleviate painful muscle contractions. However, the choice of skeletal muscle relaxants depends on the duration of the surgical procedure in order to minimize potential side effects. Skeletal muscle relaxants like neuromuscular blocking agents [NMBAs] are commonly employed as adjuvants alongside general anesthetics in clinical settings. NMBAs are also used to maintain controlled ventilation during surgery of the larynx or pharynx...
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Relaxation of Skeletal Muscles01:29

Relaxation of Skeletal Muscles

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The period of muscle contraction primarily influences the duration of stimulation at the neuromuscular junction (NMJ), the presence of free calcium ions in the sarcoplasm, and the availability of energy or ATP to support contractions.
When an action potential reaches the axon terminal, it depolarizes the membrane and opens voltage-gated sodium channels. Sodium ions enter the cell, further depolarizing the presynaptic membrane. This depolarization causes voltage-gated calcium channels to open....
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Muscle Function Obtained with Motion Mode Ultrasound and Surface Electromyography during Core Endurance Exercise
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Paraspinal Muscle Activity During Sports.

R M Letts, A O Quanbury, C D Vojnic

    The Physician and Sportsmedicine
    |July 21, 2016
    PubMed
    Summary
    This summary is machine-generated.

    Researchers studied paraspinal muscle electrical activity using telemetry. Findings offer insights into athletic performance and low back pain patient care.

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    Area of Science:

    • Biomedical Engineering
    • Sports Science
    • Rehabilitation Medicine

    Background:

    • Paraspinal muscles are crucial for spinal stability and movement.
    • Understanding their electrical activity is key to assessing function.
    • Current methods for studying muscle activity have limitations.

    Purpose of the Study:

    • To investigate the electrical activity of paraspinal muscles using advanced telemetry.
    • To explore the potential applications of these findings in athletic performance analysis.
    • To determine the relevance of paraspinal muscle electrical activity for patients experiencing low back pain.

    Main Methods:

    • Utilized sophisticated telemetry techniques to record electrical signals.
    • Focused on the electrical activity within the paraspinal musculature.
    • Collected data during various activities and conditions.

    Main Results:

    • Demonstrated the feasibility of using telemetry for paraspinal muscle analysis.
    • Identified distinct patterns of electrical activity related to performance.
    • Observed correlations between electrical activity and conditions relevant to low back pain.

    Conclusions:

    • Telemetry offers a powerful tool for studying paraspinal muscle function.
    • Findings have direct implications for optimizing athletic performance.
    • This research provides a basis for improved diagnostics and treatment strategies for low back pain.