triangular part

tri·an·gu·lar part

[TA]
the middle one of three small convolutions that together compose the inferior frontal gyrus of the cerebral cortex, the other two being the orbital part and opercular part.
Synonym(s): pars triangularis [TA]
Farlex Partner Medical Dictionary © Farlex 2012
References in periodicals archive ?
X-rays revealed a facial fracture and a "triangular part of the middle of his face was detached" and he needed surgery.
Why did you do that to a vulnerable lad?" X-rays revealed a facial fracture and a "triangular part of the middle of his face was detached" and he needed surgery.
As shown in Figure 1 and Table 2, the ReHo values were higher in depressed patients in the right superior temporal gyrus, right middle temporal gyrus, left inferior temporal gyrus, left middle temporal gyrus, right middle frontal gyrus, triangular part of the right inferior frontal gyrus, orbital part of the right inferior frontal gyrus, right superior occipital gyrus, right middle occipital gyrus, bilateral anterior cingulate, and paracingulate gyri, and values were reduced in the right fusiform gyrus, left middle occipital gyrus, left lingual gyrus, and left inferior parietal except for the supramarginal and angular gyri.
Moreover, the free caudoventral and ventral border of the basal triangular part have ventrally directed epipodal laminar setae, while the cord-like middle part was devoid from any setae, Batang & Suzuki (2000) in Cherax quadricarinatus noted that, there was a wing-like laminar extension of epipods.
where the elements of [Q.sub.l] and [Q.sub.r] are chosen randomly with zero means and standard deviations one, [T.sub.k] is strictly upper triangular with 1 on its strictly upper triangular part. The diagonal elements of [T.sub.2] are all equal to 1, and those of [T.sub.0] and [T.sub.1] are chosen so that [T.sub.0](k, k) = [[rho].sup.2]/(1 + [[epsilon].sub.k]) and [T.sub.1] (k, k) = ([[rho].sup.2] + [T.sub.0](k, k))/(1 + [[epsilon].sub.k]), for k = 1,2,3, with [[member of].sub.1] = [10.sup.-5], [[member of].sub.2] = [10.sup.-4], [[member of].sub.3] = [10.sup.-3], and [rho] is a parameter to be varied.
The SYMM operations are used for the matrix-matrix multiplication involving the blocks [A.sub.ii] (only the upper triangular part is stored, since the submatrices are symmetric).
A first step consists of removing the low rank part in the lower triangular part of the matrix.
Since C is symmetric and stored as an upper triangular matrix in this case, it is only necessary to compute the upper triangular part of the matrix operations [Alpha][AB.sup.T] and [Alpha][BA.sup.T].
This reduction in complexity is related to the structure in the lower triangular part, as the following example shows:
Observe that the matrix F is such that any submatrix contained in the lower triangular part of F has rank at most 1.