Sigmoidal hook sign (brain)

A.Prof Frank Gaillard et al.

Sigmoidal hook sign or omega sign is a term sometimes used to denote the appearance of the hand motor area (hand knob), projecting posteriorly from the precentral gyrus. This is a helpful feature in identifying the central sulcus

The term is however not terribly well known and is therefore probably not very helpful, and is probably best avoided. 

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Article information

rID: 33980
Synonyms or Alternate Spellings:
  • Sigmoid hook sign
  • Sigmoidal hook sign (brain)

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Cases and figures

  • Figure 1: anatomy: sulci of the brain
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