Human Anatomy and Histology · MU Plovdiv

9. Elbow joint. Joints between the bones of the forearm.

Inside: 7 sections · 6 labelled pictures · 12 flashcards · 3 min

Topic 9 of 212 in the MU Plovdiv syllabus for Human Anatomy and Histology (Medicine, Years 1 and 2). The free AceMed note covers it in 7 sections, about 347 words (3 min of reading), with 12 flashcards.

In this note

  1. ELBOW JOINT
  2. Structure:
  3. Movements:
  4. JUNCTIONS OF THE FOREARM BONES
  5. Distal radio-ulnar joint: ↙ synovial pivot.
  6. Proximal radio-ulnar joint:
  7. Middle radio-ulnar joint:

ELBOW JOINT

  • The elbow joint is a synovial hinge joint, connecting the arm to the forearm.
  • Consists of 3 bones: Humerus, the ulna & the radius.

Structure:

Articular Surfaces:

  • Humeroulnar joint - between the trochlea of the humerus & the trochlear notch of the ulna.
  • Humeroradial joint: Between the capitulum of the humerus and the head of the radius.

Capsule:

  • The fibrous membrane:
  • Above, it is attached to the humerus above the level of coronoid, radial, & olecranon fossae.
  • Below, It is attached to the margins of coronoid & olecranon processes of ulna & annular ligament around the head of radius.
  • The synovial membrane:

Is separated from the fibrous membrane by pads of fat in regions overlying the coronoid fossa, the olecranon fossa & the radial fossa.

→ These fat pads to accommodate the related bony processes during extension & flexion of elbow.

Ligaments:

  1. Radial collateral ligament (lateral side)
  2. Ulnar collateral ligament (Medial side)
  3. Annular ligament (surrounds the radial head)

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