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n. pl. sul·ci (-kī, -sī)
1. A deep, narrow furrow or groove, as in an organ or tissue.
2. Any of the narrow fissures separating adjacent convolutions of the brain.


sul′cal adj.


n, pl -ci (-saɪ)
1. a linear groove, furrow, or slight depression
2. (Anatomy) any of the narrow grooves on the surface of the brain that mark the cerebral convolutions. Compare fissure
[C17: from Latin]


(ˈsʌl kəs)

n., pl. -ci (-sī).
Anat. a groove or fissure, esp. a fissure between two convolutions of the brain.
[1655–65; Latin: furrow]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.sulcus - (anatomy) any of the narrow grooves in an organ or tissue especially those that mark the convolutions on the surface of the brain
fissure - (anatomy) a long narrow slit or groove that divides an organ into lobes
central sulcus, fissure of Rolando, Rolando's fissure, sulcus centralis - a brain fissure extending upward on the lateral surface of both hemispheres; separates the frontal and parietal lobes
fissure of Sylvius, lateral cerebral sulcus, sulcus lateralis cerebri, Sylvian fissure - the deepest and most prominent of the cortical fissures; separates the frontal lobes and temporal lobes in both hemispheres
parieto-occipital fissure, parieto-occipital sulcus - a sulcus near the posterior end of each hemisphere that separates the parietal lobes and the occipital lobes in both hemispheres
calcarine fissure, calcarine sulcus - a sulcus in the mesial surface of the occipital lobe of the cerebrum
anatomy, general anatomy - the branch of morphology that deals with the structure of animals
References in periodicals archive ?
Studies of children with autism spectrum disorder, for example, have shown that their inability to experience the human voice as pleasurable may be explained by a reduced coupling between the bilateral posterior superior temporal sulcus and distributed nodes of the reward system, including the Nucleus Accumbens.
(12, 13) Neuroimaging studies have shown that individuals living in larger social groups--both humans and macaques--have larger gray matter volumes in the amygdala, superior temporal sulcus (STS), and the dorsal and anterior portions of the prefrontal cortex.
Those regions included the language-related areas such as the banks of the superior temporal sulcus, caudal middle frontal gyrus, inferior parietal lobule, and pars triangularis, as well as the memory-related areas such as the entorhinal cortex and parahippocampal gyrus (Figure 3).
One such example is the Gaussian curvature of the surface of the superior temporal sulcus (Figure 2) whose Cohen's d statistic was merely 0.05, implying an uninteresting finding, but whose proposed sorting statistic yielded 0.4, implying that some separation between the two groups has been quantified.
Therefore, we also aimed to deeply explore brain areas involved in multimodal integration, such as the superior temporal sulcus (STS), the middle intraparietal sulcus (IT, BA40), the inferior frontal gyrus (IFG, BA44, BA45, and BA47), and the insula (BA13).
Livingstone, the Takeda Professor of Neurobiology at Harvard Medical School, explains that macaques -- a close evolutionary relative to humans, and a model system for studying human brain development -- form clusters of neurons responsible for recognizing faces in an area of the brain called the superior temporal sulcus by 200 days of age.
These activities all exercise the occipital lobe, the temporal lobe the temporal sulcus and the amygdala parts of the brain, responsible for visual recognition and short-term memory.
(14) For example, in a typical adult human brain, it is thought that the areas V3A, (15) V3B, (16) V5+ (17-18) (including MT and MST), V6, (19) intraparietal sulcus (IPS), (20) human ventral intraparietal area (hVIP), the cingulate sulcus (CSv), (21) and the superior temporal sulcus (STS) (22) are all motion-sensitive areas (see Figure 3).
A magnetic resonance image (MRI) showed a hypersignal in T2 on the upper and lower right frontal gyri, in the left occipital lobe, and lesions with ring enhancement in the deep upper left temporal sulcus (Figure 1).
Two regions of the brain are identified in experiments on social thinking: the superior temporal sulcus and the temporo-parietal junction.
It run parallel to the superior temporal sulcus and supplies the superior and inferior occipital gyri.
The area is called the posterior superior temporal sulcus (pSTS).

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