"upper T sign: the superior frontal sulcus intersects the precentral sulcus in a "T" junction. The central sulcus is the next posterior sulcus."
"L sign: the superior frontal gyrus intersects precentral gyrus in an "L" junction. The central sulcus is immediately posterior."
"lower T sign: the inferior frontal sulcus terminates posteriorly in the precentral sulcus in a "T" junction. The central sulcus is the next posterior sulcus."
"M sign: the inferior frontal gyrus has a characteristic "M" configuration and terminates posteriorly in the precentral gyrus. The central sulcus is immediately posterior."
"U sign: the most inferolateral extent of the central sulcus is capped by a U-shaped gyrus – the subcentral gyrus – which abuts the lateral fissure"
"U sign: the most inferolateral extent of the central sulcus is capped by a U-shaped gyrus – the subcentral gyrus – which abuts the lateral fissure"
"T1: white gray sign: gray-white contrast around the central sulcus is reduced compared to precentral and postcentral sulci 5"
"T1: white gray sign: gray-white contrast around the central sulcus is reduced compared to precentral and postcentral sulci 5"
Expected headings
"fMRI"
"The Rolandic sulcus (as it once was) was named after the Italian anatomist, Luigi Rolando (1773-1831) 4. Rolando studied in Turin, Sardinia and Florence and through his studies and drawings recognised, despite considerable variation between cadavers, two enlongated 'gyri ascending from the area of the lateral sulcus and the sulcus between them' 12."