INTRODUCTION TO THE BIOMECHANICS OF ELBOW COMPLEX.pptx
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The articulation present at the junction of arm and forearm constituting the combination of three bones at a site is termed as Elbow Complex. The elbow is considered a stable joint, with structural integrity, good ligamentous support, and good muscular support. The elbow has three joints allowing motion between the three bones of the arm and forearm (humerus, radius, and ulna). The three joints of the elbow complex do not all reach a close-packed position (i.e., position of maximum joint surface contact and ligamentous support) at the same point in the range of motion.
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The wrist is composed of radiocarpal and intercarpal articulations
The wrist consists of 10 small carpal bones but can be functionally divided into the radiocarpal and the midcarpal joints.
The radiocarpal joint involves the broad distal end of the radius and two carpals, the scaphoid and the lunate.
There is also minimal contact and involvement with the triquetrum
This ellipsoid joint allows movement in two planes: flexion extension and radialulnar flexion.
It should be noted that wrist extension and radial and ulnar flexion primarily occur at the radiocarpal joint but a good portion of the wrist flexion is developed at the midcarpal joints.
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The joints, muscular components and the anatomical structures together working unanimously for the movements to occur at a shoulder joint are termed as constituents of Shoulder Complex.
The shoulder complex has many articulations, each contributing to the movement of the arm through coordinated joint actions.
The shoulder complex is composed of Three segment namely Scapula, Clavicle & Humerus.
Movement at the shoulder joint involves a complex integration of static and dynamic stabilizers.
BIOMECHANICS OF THE MOVEMENT OF THE SHOULDER COMPLEX.pptx
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The shoulder complex acts as in coordinated fashion to provide the smoothest and greatest range of motion possible of the upper limb.
Combined motion of GH and ST joint of shoulder complex helps in:
Distribution of motion between other two joints.
Maintenance of glenoid fossa in optimal position.
Maintenance of good length tension
Although some amount of glenohumeral motion may occur while the other shoulder articulations remain stabilized, movement of the humerus more commonly involves some movement at all three shoulder joints.
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This is a ball and socket type synovial joint with 3属 of freedom.
The GH Joint has sacrificed congruency to serve mobility needs of hands.
The articulation is made up of the large head of the humerus and small glenoid fossa.
The glenoid fossa at scapula serves as the proximal articular surface for this joint.
The fossa may be tilted slightly upward or downward when the arm is at the side, although commonly show a slight upward tilt.
The distal articular surface that is larger than that of proximal segment forming 1/3rd to one half of sphere.
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- 2. CONTENTS BASICS ABOUT ELBOW COMPLEX SPECIFICATIONS OF ELBOW COMPLEX ARTICULATIONS OF ELBOW COMPLEX INTER-OSSEOUS MEMBRANE LIGAMENTS AROUND ELBOW COMPLEX
- 3. BASICS The articulation present at the junction of arm and forearm constituting the combination of three bones at a site is termed as Elbow Complex. The elbow is considered a stable joint, with structural integrity, good ligamentous support, and good muscular support. The elbow has three joints allowing motion between the three bones of the arm and forearm (humerus, radius, and ulna). The three joints of the elbow complex do not all reach a close-packed position (i.e., position of maximum joint surface contact and ligamentous support) at the same point in the range of motion.
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