Sigmoidal hook sign (brain)

Last revised by Pir Abdul Ahad Aziz Qureshi on 27 Jul 2022

Citation, DOI, disclosures and article data

Citation:

Gaillard F, Qureshi P, Hacking C, et al. Sigmoidal hook sign (brain). Reference article, Radiopaedia.org (Accessed on 20 Apr 2024) https://doi.org/10.53347/rID-33980

DOI:

https://doi.org/10.53347/rID-33980

Permalink:

https://radiopaedia.org/articles/33980

rID:

33980

Article created:

31 Jan 2015, Frank Gaillard ◉ ◈

Disclosures:

At the time the article was created Frank Gaillard had no recorded disclosures.

View Frank Gaillard's current disclosures

Last revised:

27 Jul 2022, Pir Abdul Ahad Aziz Qureshi ◉

Disclosures:

At the time the article was last revised Pir Abdul Ahad Aziz Qureshi had no recorded disclosures.

View Pir Abdul Ahad Aziz Qureshi's current disclosures

Revisions:

5 times, by 5 contributors - see full revision history and disclosures

Systems:

Central Nervous System

Synonyms:

Sigmoid hook sign
Sigmoidal hook sign (brain)

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.