anatomy and physiology mcqs

Question #271

What type of joint is the pubic symphysis?

Joints can occur between any two skeletal structures and can be classified based on their structure:

  1. Fibrous (syndesmosis): fibrous tissue connects the two skeletal components
  2. Primary cartilaginous (synchondrosis): hyaline cartilage connects the two skeletal components
  3. Secondary cartilaginous: hyaline cartilage lines the two skeletal components, between this is fibrocartilage
  4. Synovial: hyaline cartilage lines the two skeletal components, surrounding the joint is a synovial membrane which is supported externally by a fibrous capsule and often ligaments, internally the space between the two joint surfaces is filled with synovial fluid
  5. Atypical synovial: as a synovial joint but the joint surfaces are lined with fibrocartilage rather than hyaline cartilage

The following is an abbreviated list of examples of different joint types:

  • Fibrous
    • Skull sutures
    • Distal/inferior tibiofibular
    • Radio-ulnar interosseous membrane
    • Posterior part of sacroiliac joint (anterior is synovial)
  • Primary cartilaginous
    • Costochondral
    • 1st sternocostal
    • Epiphyseal plate
  • Secondary cartilaginous
    • Intervertebral discs
    • Pubic symphysis
    • Manubriosternal
  • Synovial
    • Condyloid
      • Atlanto-occipital
      • Metatarsophalangeal/metacarpophalangeal
      • Radiocarpal
    • Hinge
      • Elbow
      • Knee
      • Interphalangeal
      • Temporomandibular (atypical)
    • Pivot
      • Superior and inferior radioulnar
      • Atlanto-axial
    • Ball and socket
      • Hip
      • Shoulder
      • Talonavicular
    • Saddle (Sellar)
      • Sternoclavicular (atypical, functions as ball and socket)
      • 1st carpometacarpal
    • Plane
      • Proximal tibiofibular
      • Intertarsal, intercarpal
      • Tarsometatarsal, 2nd-5th carpometacarpal
      • Intermetatarsal, intermetacarpal
      • Facet joints (zygapophysial)
      • Costovertebral (head of rib and costotransverse)
      • Interchondral
      • 2nd – 7th sternochondral (atypical)
      • Acromioclavicular (atypical)
      • Intermetacarpal

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