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Related Concept Videos

Tension01:10

Tension

13.5K
Tension is a force along the length of a medium, in particular, a force carried by a flexible medium, such as a rope or cable. The word "tension" comes from Latin, meaning "to stretch". Not coincidentally, the flexible cords that carry muscle forces to other parts of the body are called tendons. Any flexible connector, such as a string, rope, chain, wire, or cable, can exert pull only parallel to its length; so, a force carried by a flexible connector is a tension with a...
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Muscles that Move the Head01:19

Muscles that Move the Head

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The muscles that move the head are a dynamic and complex group of structures that work together to facilitate a wide range of head movements, including rotation, flexion, extension, and lateral bending.
The bilateral sternocleidomastoid, or SCM, and the suprahyoid and infrahyoid muscles are significant head flexors. The SCM muscles originate at the sternum and clavicle and attach to the mastoid process of the temporal bone. The SCM contracts bilaterally to bend the head forward, whereas...
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Posttensioned Masonry Walls01:15

Posttensioned Masonry Walls

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Post-tensioned masonry walls use high-strength steel rods or flexible tendons to enhance the strength and efficiency of masonry structures. These elements are securely anchored to the foundation and extend vertically either within the cores of the masonry units or between the masonry wythes. The construction process involves building the wall with these tensioning elements in place and allowing the mortar to fully cure.
Following the curing process, the tensioning begins. Steel rods are...
417
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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Tonsillitis I: Introduction01:30

Tonsillitis I: Introduction

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Tonsillitis is inflammation of the tonsils, which are two lymphoid tissue masses at the back of the throat. This condition can cause discomfort and irritation in the throat.
Etiology
Three primary contributing factors have been identified.
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Centrally Acting Muscle Relaxants: Therapeutic Uses01:24

Centrally Acting Muscle Relaxants: Therapeutic Uses

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Centrally acting muscle relaxants reduce muscle tone and tension by interfering with the postsynaptic reflexes in the central nervous system.
Centrally acting drugs are classified into spasmolytic and antispasmodic drugs. Spasmolytic drugs such as baclofen, diazepam, and tizanidine inhibit spinal motor neurons and decrease muscle tone. Spasmolytic drugs are administered for severe and chronic spasms due to multiple sclerosis, cerebral palsy, stroke, and spinal cord and muscle injuries. However,...
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Related Experiment Video

Updated: Jan 2, 2026

Dural Stimulation and Periorbital von Frey Testing in Mice As a Preclinical Model of Headache
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Dural Stimulation and Periorbital von Frey Testing in Mice As a Preclinical Model of Headache

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Tension headache.

D K Ziegler

    The Medical Clinics of North America
    |May 1, 1978
    PubMed
    Summary
    This summary is machine-generated.

    Identifying tension headaches, often linked to stress, remains challenging. Differentiating them from migraines involves understanding muscle contractions and exploring treatments like medication, psychotherapy, and biofeedback.

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    Area of Science:

    • Neurology
    • Psychiatry

    Background:

    • Headaches are common, with many linked to stress.
    • Defining and differentiating "tension headaches" from migraines is difficult.
    • Identifying specific stress-induced headache patterns and muscle contraction links is problematic.

    Purpose of the Study:

    • To clarify the definition and characteristics of tension headaches.
    • To explore the relationship between stress, muscle contraction, and headache symptoms.
    • To review current and potential treatment strategies for tension headaches.

    Main Methods:

    • Literature review on headache classification and etiology.
    • Analysis of the relationship between psychological stress and physiological responses (muscle tension).
    • Examination of treatment modalities including pharmacotherapy, psychotherapy, and behavioral techniques.

    Main Results:

    • Tension headaches are common but difficult to define and distinguish from migraines.
    • Involuntary neck and scalp muscle contraction is a key feature.
    • Treatment involves analgesics, tranquilizers, psychotherapy, and lifestyle changes.

    Conclusions:

    • Clear diagnostic criteria for tension headaches are needed.
    • Stress management and addressing muscle tension are crucial for treatment.
    • The efficacy of various psychotherapeutic and biofeedback techniques requires further rigorous investigation compared to traditional methods.