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McGregor's base line [1 record]

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Record 1 2012-03-01

English

Subject field(s)
  • Radiography (Medicine)
  • Musculoskeletal System
DEF

A line used in the diagnosis of basilar impression. It extends from the posterior aspect of the hard palate to the lowermost point of the middle of the occipital curve. Normally the tip of the dens should not be more than 8 mm above this line in males and 9.7 mm in females. [From JARAD, 1982, p. 57 and ARARH 1982, vol. 2, p. 55.]

French

Domaine(s)
  • Radiographie (Médecine)
  • Appareil locomoteur (Médecine)
DEF

Ligne sur le cliché de profil du crâne, qui réunit le bord postérieur du palais osseux à l'écaille de l'occipital; elle sert à l'évaluation de l'impression basilaire.

OBS

Chez le sujet normal, les lignes de Chamberlain et de MacGregor se confondent presque. On admet que l'odontoïde peut dépasser la ligne de MacGregor de 9 mm, sinon on parle d'impression basilaire.

Spanish

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TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
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