External Oblique
External Oblique - Related Videos
09:10
The Preparation of Oblique Spinal Cord Slices for Ventral Root Stimulation
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Cited by 1 •
2016
We show how to prepare oblique slices of the spinal cord in young mice. This preparation allows for the stimulation of the ventral roots.
01:20
Externalities
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2025
Externalities are unintended side effects of economic activities that impact third parties who are not directly involved in the market transaction. They can have positive or negative effects that can influence society and the environment in various ways. Positive Externalities Positive externalities occur when a market activity produces benefits for others without those beneficiaries having to pay for it. Examples include: Education: When individuals receive an education, society benefits...
01:16
Stress on an Oblique Plane
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2024
Understanding stress on an oblique plane under axial loading is pivotal in material mechanics. This analysis offers insight into a material's durability and strength, which is crucial for civil engineering and structural design. Axial loading refers to force application along the material's central axis, causing compression or elongation and leading to normal stress. Normal stress occurs when a force acts perpendicularly to the material's area, resulting in compressive or tensile stress. When...
01:11
Work Done on a System by External Force
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2023
The work done by an external force on a particle changes its kinetic energy. However, internal forces must also be considered for a system of interacting particles. The potential energy formulation helps formulate the effect of internal forces. The net work done by an external force can be written in terms of the total change of mechanical energy, which includes both kinetic and potential energies. In the presence of a non-conservative opposing force, like friction, some part of the work done...
12:42
Pelvic Exam I: Assessment of the External Genitalia
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2023
Source: Alexandra Duncan, GTA, Praxis Clinical, New Haven, CT Tiffany Cook, GTA, Praxis Clinical, New Haven, CT Jaideep S. Talwalkar, MD, Internal Medicine and Pediatrics, Yale School of Medicine, New Haven, CT The pelvic exam can feel invasive to patients, so it is important to do everything possible to make patients feel comfortable and empowered, rather than vulnerable. Clinicians should be aware of how they are communicating, both verbally and nonverbally, and should give their patients...
FAQs
The inferomedial fiber direction allows contraction to transmit force between the lower ribs, abdominal aponeurosis, linea alba, and pelvis. This arrangement supports trunk flexion and contributes to rotation toward the opposite side when activation is asymmetric. It also helps the muscle compress abdominal contents, linking its anatomical orientation to both movement and abdominal wall mechanics.
Unilateral external oblique activation creates an asymmetric pull across the anterolateral abdominal wall. Because the muscle spans from the lower ribs toward central and pelvic structures, that pull turns the trunk toward the opposite side. Coordinated activation on both sides instead emphasizes trunk flexion, abdominal compression, and stabilization rather than producing the same rotational effect.
The muscle assists forced expiration by contributing to abdominal compression. Its contraction increases pressure within the abdominal region and supports the coordinated mechanics required to move air out more forcefully. This respiratory role shows that the external oblique is not limited to locomotor function; it also links abdominal wall activity with breathing demands.
The linea alba and abdominal aponeurosis provide important connective pathways through which external oblique forces are transmitted. Rather than acting only at a single joint, the muscle distributes tension across the abdominal wall and toward the pelvis. This arrangement helps explain its combined effects on trunk stability, abdominal compression, and movement.
An effective anatomical study should trace the muscle from its lower-rib fibers toward the linea alba, pelvis, and abdominal aponeurosis, then relate that course to its actions. Observing how fiber orientation corresponds with flexion, opposite-side rotation, compression, and forced expiration connects structural anatomy with functional interpretation.
In biomechanics, the external oblique provides a model for examining how muscle orientation produces trunk motion and stability. In rehabilitation, its actions offer a framework for considering abdominal wall performance during movement and posture. These applications help connect anatomical findings with exercise planning and the study of altered trunk mechanics.
Clinical evaluation can help investigate whether trunk weakness or injury is affecting abdominal wall mechanics. Because the external oblique contributes to stabilization, flexion, opposite-side rotation, compression, and forced expiration, assessment of related function can inform interpretation of movement or breathing difficulties. The findings are relevant to anatomical and rehabilitation-focused evaluation.