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Related Concept Videos

Muscles that Move the Arm01:31

Muscles that Move the Arm

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Nine muscles are involved in arm movements. Two of these, the pectoralis major and latissimus dorsi, originate from the axial skeleton and are called axial muscles. The other seven originate from the scapula and are called the scapular muscles.
The pectoralis major has two origins. Its clavicular head originates on the medial half of the clavicle. In contrast, the sternocostal head originates on the costal cartilages of ribs 1-6, the sternum, and the aponeurosis of the external oblique of the...
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Muscles of the Shoulder01:23

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The muscles surrounding the shoulder girdle, including the clavicle and scapula, primarily stabilize the scapula. This stable base allows other muscles to move the humerus effectively. Scapular movements often mirror those of the humerus and extend its range of motion. For instance, raising the arm above the head would not be feasible without simultaneous upward rotation of the scapula.
Anterior Thoracic Muscles
The anterior thoracic muscles include the serratus anterior, subclavius, and...
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Muscle Coordination and Action01:24

Muscle Coordination and Action

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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.
Agonists
Agonist muscles, often called prime movers, are the primary muscles responsible for producing a specific movement....
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Bones of the Upper Limb: Humerus01:19

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The upper limb consists of the arm, forearm, wrist, and hand bones. The humerus is the single bone of the upper arm region. Proximally, it has a large, spherical, smooth head that articulates with the glenoid cavity of the scapula to form the glenohumeral or shoulder joint. The margin of the head is the anatomical neck, a residual epiphyseal plate. Laterally it extends to form bony projections called the greater tubercle and the lesser tubercle. Next to the tubercles is the surgical neck, a...
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Muscles of the Forearm that Move the Hand and Fingers01:17

Muscles of the Forearm that Move the Hand and Fingers

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The muscles of the forearm that move the wrist, hand, and digits are numerous and diverse. They can be classified into two groups based on their location and function — the anterior and posterior compartment muscles.
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The anterior compartment muscles originate from the humerus. They primarily function as flexors and are also known as flexor muscles. They typically insert on the carpals, metacarpals, and phalanges. The superficial layer includes the flexor carpi...
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Muscles that Move the Forearm01:16

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The muscles that move the forearms can be divided into four groups: forearm flexors, forearm extensors, forearm pronators, and forearm supinators. The flexors and extensors act on the elbow joint, while the pronators and supinators act on the radioulnar joints.
Forearm Flexors
The biceps brachii, brachialis, and brachioradialis are forearm flexors. The biceps brachii is made up of two heads. Its long head originates at the supraglenoid tubercle of the scapula, whereas that of the short head is...
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Related Experiment Videos

Rotator cuff tendon connections with the rotator cable.

Madis Rahu1,2, Ivo Kolts3, Elle Põldoja3

  • 1Institute of Anatomy, University of Tartu, Ravila 19, 50411, Tartu, Estonia. madis.rahu@regionaalhaigla.ee.

Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA
|May 4, 2016
PubMed
Summary

The rotator cable is a key anatomical structure tightly connected to the supraspinatus, infraspinatus, and teres minor tendons. This connection may explain functional shoulder integrity despite rotator cuff tears.

Keywords:
AnatomyLigamentum semicirculare humeriRotator cableRotator cuff muscle tendons

Related Experiment Videos

Area of Science:

  • Anatomy
  • Orthopedics
  • Shoulder Biomechanics

Background:

  • The rotator cuff tendons are crucial for shoulder function.
  • The rotator cable (ligamentum semicirculare humeri) anatomy and its relationship with rotator cuff tendons are not well-described.
  • Understanding this relationship is important for explaining shoulder function and injury.

Purpose of the Study:

  • To detail the anatomy of the rotator cuff tendons.
  • To describe the rotator cable and its association with the rotator cuff tendons.

Main Methods:

  • Anatomical dissection of 21 fresh-frozen shoulder specimens.
  • Layer-by-layer dissection from the bursal side to the joint.
  • Detailed examination of rotator cuff tendons and associated ligaments, including the rotator cable.

Main Results:

  • The rotator cable was identified in all specimens.
  • A tight connection was observed between the rotator cable and the supraspinatus tendon.
  • The rotator cable's posterior insertion connected the teres minor, infraspinatus, and supraspinatus tendons.

Conclusions:

  • The rotator cable forms a strong connection with rotator cuff tendons, supporting the suspension bridge theory for tears.
  • The rotator cable acts as a crucial connecting structure in its posterior insertion.
  • These anatomical findings may elucidate how some individuals maintain shoulder function with significant rotator cuff tears.