(Fig 4-B.08) Anatomy of Prepatellar Quadriceps Continuation

https://youtu.be/nSiZht4m_40

 

https://youtu.be/w63GyfUeIyw

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📌The Prepatellar Quadriceps Continuation 

• Formed by anterior fibers of rectus femoris tendon
• Inserts onto superior patella, then continues distally
• Adheres to anterior patellar surface via fibrocartilaginous enthesis (#fibrocartilage, #enthesis)
• Joins patellar tendon, inserting onto tibial tuberosity

 

✅ Fibrocartilaginous Attachment 

• Thin fibrocartilage layer covers patellar surface at continuation
• Reduces friction against overlying tendon fibers
• Small, loosely attached amount at patellar attachment
• Tendon transitions through zones: dense connective tissue, uncalcified fibrocartilage, calcified fibrocartilage, bone

 

✅ Imaging and Injury 

• Normally no space between continuation and patella
• With injury, thin fluid line may be seen (distinct from bursitis)
• Understanding anatomy aids in evaluating extensor mechanism injuries

 

References: 

RadioGraphics 2018; 38:2069-2101 

AJR 2009; 192:W111-W116 

Magn Reson Imaging Clin N Am 22 (2014) 601-620

 

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#prepatellarquadricepscontinuation, #quadricepstendon, #patellartendon, #fibrocartilage, #enthesis, #tendonboneinterface, #extensorinjury, #patellarinjury, #kneeanatomy, #radiology