INTRODUCTION TO THE BIOMECHANICS OF ELBOW COMPLEX.pptx

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.

1. INTRODUCTION TO ELBOW COMPLEX DR. NIDHI SHUKLA

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.

4. SPECIFICATIONS It consist of Elbow joint (humero-ulnar and humero-radial articulation) Proximal radio-ulnar joint and Distal radio-ulnar joint. It is a compound joint of hinge variety. Uniaxial di-arthrodial joint .

5. ARTICULATIONS Between ulna and humerus occurs primarly as a sliding motion of the trochlear notch of the ulna on the trochlea . In extension sliding continues untill the olecranon process enters the olecranon fossa In flexion ulna slides until the conoid process enters the coniod fossa in full flexion. Between the radius and humerus involves sliding of the concave radial head over the capitulum In full extension there is no contact but in flexion the rim of the radius in the capitulo -trochlear groove and enters the radial fossa at the end of flexion.

6. INTEROSSEOUS MEMBRANE It is a broad collagenous sheet that runs between the radius and ulnar . It provides stability for both superior and inferior radio-ulnar joints. It also reinforces inferior radio-ulnar joint.

7. LIGAMENTS AROUND ELBOW COMPLEX Dorsal radio –ulnar ligament Palmar radio -ulnar ligament Interosseous ligament The palmar and dorsal ligament originates from the dorsal and palmar aspects of ulnar notch extends the ulnar fovea and the base of the styloid process.