Notch

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Related to sigmoid notch: submandibular fossa, malar process

Notch

Slang; in bond trading, a small increase or decrease in a bond rating. For example, if a rating goes from AAA to AA+, it is said to decline by a notch.
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13) As performed today, a subperiosteal resection of the entire distal ulna is performed from just proximal to the sigmoid notch.
Additionally, it prevents painful erosion of the sigmoid notch that can be seen following ulnar head arthroplasty.
Periprosthetic bone resorption and sigmoid notch erosion around ulnar head implants: a concern?
The indications and criteria for ligament reconstruction include unidirectional or bidirectional chronic instability of the distal radio ulnar joint, absence of substantial arthritis, and a competent sigmoid notch rim with no residual axial instability of the forearm.
We confirmed our diagnosis with plain radiography and assessed the status of sigmoid notch and associated TFCC injuries using MRI in all our patients.
Through viscoelastic forces, the deep head of the pronator actively compresses the ulnar head into the sigmoid notch in pronation and acts to do the same, but in lesser magnitude, during supination.
Dorsal dislocations of the ulna present with a dorso-ulnar prominence with a block to supination; in volar dislocations, a volar-ulnar prominence is associated with a palpable radial sigmoid notch and a block to pronation.