Retrodiscal zone

The retrodiscal (bilaminar) zone is located between the posterior band of the TMJ disc and the posterior portion of the TMJ capsule. The 'bilaminar' refers to the two posterior attachments of the disc:

  • superior layer: elastic to allow anterior translation of the disc over the articular eminence
  • inferior layer (collagen): inelastic to maintain relationship with condyle

It also contains a small neurovascular bundle.

Related pathology

In TMJ inflammation, the retrodiscal area is a prominant site of oedema.

Head and neck anatomy
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Article information

rID: 5537
Section: Anatomy
Tags: tmj, refs
Synonyms or Alternate Spellings:

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Cases and figures

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