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The human leg comprises an intricate system of muscles that facilitate the movement of feet and toes. Within this system, the muscles are categorized into the anterior, lateral, and posterior compartments, each with a unique set of muscles carrying out specific functions.
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The tibia is the main weight-bearing bone of the lower leg. It is larger than the fibula with which it is paired. The tibia is also the second longest bone in the body and is located right below the skin. The proximal end of the tibia forms the medial and the lateral condyle, which articulates with the condyles of the femur to form the knee joint. Between the articulating surfaces is the irregular elevated area known as the intercondylar eminence that serves as the inferior attachment point for...
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The movement of the legs is facilitated by numerous muscles located within the anterior, medial, and posterior compartments of the thigh.
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Skeletal muscles, the key players in our body's movement, can be classified into two groups based on their location and function: axial muscles and appendicular muscles. These classifications reflect the primary roles the muscles play in the body's structure and movement.
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Muscle coordination is a complex and finely tuned process essential for smooth and purposeful movements like flexion, extension, adduction, abduction, and rotation. The human body orchestrates the actions of various muscles working in concert, each with a specific role. Four functional types describe how muscles work together: agonist, antagonist, synergist, and fixator.
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Normal Variants: Accessory Muscles About the Ankle.

Yvonne Cheung1

  • 1Department of Radiology, Dartmouth-Hitchcock Medical Center, One Medical Center Drive, Lebanon, NH 03756, USA.

Magnetic Resonance Imaging Clinics of North America
|November 28, 2016
PubMed
Summary
This summary is machine-generated.

Accessory ankle muscles, often found incidentally on imaging, can mimic masses or cause pain. This article details these muscles and proposes an imaging algorithm for accurate diagnosis and patient management.

Keywords:
Accessory musclesAccessory soleusAnkleFlexor digitorum accessorius longusPeroneocalcaneus internusPeroneus quartusTibiocalcaneus internus

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Area of Science:

  • Anatomy
  • Radiology
  • Orthopedics

Background:

  • Accessory muscles of the ankle are frequent incidental findings on cross-sectional imaging.
  • While often asymptomatic, these muscles can present as mass lesions or cause symptoms like tarsal tunnel syndrome and chronic pain.
  • Differentiating accessory muscles can be difficult due to similar anatomical pathways.

Purpose of the Study:

  • To describe accessory ankle muscles and their anatomical relationships.
  • To propose an imaging algorithm for identifying these muscles.
  • To enhance diagnostic accuracy and guide patient management.

Main Methods:

  • Detailed description of accessory ankle muscles and their anatomical course.
  • Presentation of a diagnostic imaging algorithm.
  • Review of clinical implications and diagnostic challenges.

Main Results:

  • Accessory muscles around the ankle are common incidental findings.
  • These muscles can mimic soft-tissue masses and cause various clinical symptoms.
  • An imaging algorithm aids in distinguishing these muscles from other pathologies.

Conclusions:

  • Accurate identification of accessory ankle muscles is crucial for diagnosis and management.
  • The proposed imaging algorithm provides a systematic approach for radiologists.
  • Understanding these anatomical variations improves patient care and avoids misdiagnosis.