Bunnel Test

Bunnel Test

  • Bunnel Test is used to distinguish between intrinsic muscles tightness & extrinsic muscle tightness.

  • Examiner passively flexes PIPJ twice
    • first with MCP in extension
    • next with MCP held in flexion

  • Intrinsic tightness present if PIP can be flexed easily when MCP is flexed but NOT when MCP is extended
  • extrinsic tightness present if PIP can be flexed easily when MCP is extended but NOT when MCP is flexed

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