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Related Concept Videos

Isotonic and Isometric Muscle Contractions01:22

Isotonic and Isometric Muscle Contractions

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Two primary types of muscle contractions are isotonic and isometric, each serving unique functions and involving distinct mechanisms. Both isotonic and isometric contractions are integral to the body's complex system of movement and stability. Isotonic exercises contribute significantly to functional strength and movement, while isometric contractions are crucial for maintaining posture and joint stability.
Isotonic contractions
Isotonic contractions occur when a muscle changes length while...
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Muscle Stimulation Frequency01:22

Muscle Stimulation Frequency

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The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
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Functions of Smooth Muscles01:23

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Smooth muscles are an important type of muscle tissue that plays a vital role in the involuntary movements of internal organs. For example, they help regulate the movement of food through the gut and the flow of blood through the circulatory system.
Function of visceral smooth muscles
Visceral smooth muscle is found in the walls of all hollow organs, except the heart, and is a key player in the involuntary movements that drive the functioning of these internal organs. This tissue is arranged in...
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Structure and Organization of Smooth Muscles01:13

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Smooth muscle tissue is a type of muscle tissue that can be found lining various vital organs in the human body, including the lungs, blood vessels, digestive tract, and respiratory tract. This type of tissue is responsible for regulating the movements of these organs, playing crucial roles in the functioning of various systems, including the vascular, digestive, respiratory, and urinary systems.
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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.
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Live Imaging and Analysis of Muscle Contractions in Drosophila Embryo
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When muscle quivers and undulates.

Alex Rebello1, Mohd Asif2, Kumbha Dhanusha2

  • 1Department of Neurology All India Institute of Medical Sciences Mangalagiri India.

Clinical Case Reports
|July 28, 2022
PubMed
Summary
This summary is machine-generated.

We report a case of Isaacs syndrome, a rare neurological disorder. Diagnosis was confirmed by detecting high levels of CASPR2 antibodies in the patient's blood.

Keywords:
CASPR2 antibodiesIsaacs syndromeMyokymiaacquired neuromyotonia

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Area of Science:

  • Neurology
  • Immunology

Background:

  • Isaacs syndrome is a rare autoimmune disorder characterized by continuous muscle membrane hyperexcitability.
  • Clinical presentation can include myokymia, cramps, and fatigue.

Observation:

  • A patient presented with fatigue and a pulling sensation in the lower limbs.
  • Physical examination revealed continuous muscle contractions over the trunk, a condition known as myokymia.

Findings:

  • The clinical presentation strongly suggested Isaacs syndrome.
  • Diagnostic confirmation was achieved through laboratory testing, revealing significantly elevated levels of CASPR2 antibodies in the blood.

Implications:

  • This case highlights the importance of recognizing the clinical features of Isaacs syndrome.
  • Elevated CASPR2 antibodies serve as a key diagnostic biomarker for this condition.
  • Understanding the immunological basis of Isaacs syndrome is crucial for developing targeted therapies.