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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.
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Skeletal Muscle Relaxants: Adverse Effects01:21

Skeletal Muscle Relaxants: Adverse Effects

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Skeletal muscle relaxants are widely used for muscle paralysis and relieving pain following any muscle injury or stiffness. However, depending on the drug type, they can have adverse effects that range from mild to severe. Usually, nondepolarizing neuromuscular blockers have minimal side effects. For example, drugs like d-tubocurarine, cisatracurium, and rocuronium cause hypotension, whereas drugs like baclofen, when stopped abruptly, can lead to the recurrence of spastic conditions.
Unlike...
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Muscle Recovery and Fatigue01:24

Muscle Recovery and Fatigue

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Muscle fatigue refers to the decline in a muscle's ability to maintain the force of contraction after prolonged activity. It primarily stems from changes within muscle fibers. Even before experiencing muscle fatigue, one may feel tired and have the urge to stop the activity. This response, known as central fatigue, occurs due to changes in the central nervous system, namely the brain and spinal cord. While there is no single mechanism that induces fatigue, it may serve as a protective...
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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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Disorders of the Skeletal Muscle01:28

Disorders of the Skeletal Muscle

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The clinical conditions affecting the skeletal muscle tissue are broadly categorized as musculoskeletal and neuromuscular disorders.
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...
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Directly Acting Muscle Relaxants: Dantrolene and Botulinum Toxin01:26

Directly Acting Muscle Relaxants: Dantrolene and Botulinum Toxin

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Directly acting muscle relaxants like dantrolene and botulinum toxin (BoNT) have distinct mechanisms and applications. Dantrolene, a hydantoin derivative, acts on the ryanodine receptor (RYR1) in skeletal muscle cells. RYR1 are calcium channels present at the sarcoplasmic reticulum membrane. In response to excitation, they release calcium ions from the sarcoplasmic reticulum to the cytosol. Calcium promotes actin-myosin-mediated contraction of muscles.
The binding of dantrolene to the RYR1...
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Related Experiment Video

Updated: Mar 17, 2026

Membrane Potentials, Synaptic Responses, Neuronal Circuitry, Neuromodulation and Muscle Histology Using the Crayfish: Student Laboratory Exercises
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Outwitting Muscle Cramps-Is It Possible?

C Benda

    The Physician and Sportsmedicine
    |July 15, 2016
    PubMed
    Summary

    Muscle cramps frequently affect athletes pushing their physical limits. Understanding and preventing these involuntary muscle contractions is crucial for athletic performance and recovery.

    Area of Science:

    • Sports Medicine
    • Exercise Physiology
    • Muscle Physiology

    Background:

    • Muscle cramps are a prevalent issue for athletes, often occurring during or after intense physical exertion.
    • The exact causes of exercise-associated muscle cramps (EAMC) remain incompletely understood, with multiple contributing factors proposed.

    Purpose of the Study:

    • To investigate the underlying mechanisms contributing to muscle cramps in athletes.
    • To explore potential interventions for preventing and treating exercise-associated muscle cramps.

    Main Methods:

    • Review of current scientific literature on muscle physiology and athletic performance.
    • Analysis of biomechanical and physiological data related to muscle fatigue and cramping.

    Main Results:

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    • Evidence suggests a multifactorial etiology for muscle cramps, including neuromuscular fatigue, dehydration, and electrolyte imbalances.
    • Certain stretching and hydration strategies may help mitigate cramp occurrence.

    Conclusions:

    • Addressing neuromuscular fatigue and maintaining hydration are key strategies for managing muscle cramps in athletes.
    • Further research is needed to fully elucidate the complex factors involved in muscle cramp development.