precuneus


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precuneus

 [pre-ku´ne-us] (L.)
a small convolution on the medial surface of the parietal lobe of the cerebrum.

pre·cu·ne·us

(prē-kū'nē-ŭs), [TA]
A division of the medial surface of each cerebral hemisphere between the cuneus and the paracentral lobule; it lies above the subparietal sulcus and is bounded anteriorly by the marginal branch of the cingulate sulcus and posteriorly by the parietooccipital sulcus.
Synonym(s): quadrate lobe of liver (3) [TA], lobulus quadratus (2) , quadrate lobule (2)
[pre- + L. cuneus, a wedge]

pre·cu·ne·us

(prē-kyū'nē-ŭs) [TA]
A division of the medial surface of each cerebral hemisphere between the cuneus and the paracentral lobule; it lies above the subparietal sulcus and is bounded anteriorly by the marginal part of the cingulate sulcus and posteriorly by the parietooccipital sulcus.
Synonym(s): quadrate lobe (3) .
[pre- + L. cuneus, a wedge]
References in periodicals archive ?
Lisanby, "Facilitation of performance in a working memory task with rTMS stimulation of the precuneus: frequency- and time-dependent effects," Brain Research, vol.
A resting-state fMRI study showed that ayahuasca decreased activation of key hubs of the default mode network (DMN), including the posterior cingulate (PCC) and the medial prefrontal cortices and the precuneus (33).
A recent meta-analysis [10] of studies of false belief, a central concept of ToM [11-13], and vPT confirmed that overlap between these areas is sparse, consisting of small regions around the posterior part of left TPJ and of the precuneus.
Parahippocampal gyrus 37 R Culmen, anterior cerebellum R Fusiform gyrus 37 R Middle frontal gyrus 46 R Claustrum R Middle frontal gyrus 32 L Inferior occipital gyrus 19 R Parahippocampal gyrus 36 L Parahippocampal gyrus 37 L Inferior frontal gyrus 9 L Middle frontal gyrus 6 R Insula 13 L Inferior frontal gyrus 9 R Precuneus 7 R Parahippocampal gyrus 27 R Amygdala R Inferior occipital gyrus 19 L Middle occipital gyrus 18 L Lingual gyrus 18 R Lingual gyrus 18 L Inferior occipital gyrus 18 R Anterior cingulate cortex 32 L Anterior cingulate cortex R Parahippocampal gyrus 27 L Precentral gyrus 4 L Amygdala L Amygdala L Table 2: Comparative analysis of the six reviewed models.
More in detail, patients suffering from MCI depict areas of hypoperfusion in bilateral parietal lobes [7], posterior cingulate cortex (PCC) and precuneus [10,13], left (L) occipital lobe, and bilateral frontal and temporal lobes [14], compared to healthy controls (HC).
Areas such as the cerebellum, the premotor area, the precuneus, and the prefrontal and parietal cortexes seem to be more active in iPD patients than in healthy individuals under DT [26].
suggested that the comfortable sensation generated by back massage may be related to increased regional cerebral blood flow in the posterior brain--specifically, in the precuneus [16].
La sensacion de control voluntario seria generada por la comunicacion reverberante entre areas laterales como la PreSMA, CPM y el surco intraprarietal (SIP), mientras que la sensacion de propiedad corporal emergeria de la interaccion entre zonas mediales como la corteza prefrontal medial (CPFm), la corteza cingulada posterior (CCP) y el precuneus. Alteraciones en estas redes podrian estar implicadas en los casos de miembro fantasma donde hay hiperempatia al dolor, tacto y movimiento ajeno (Ramachandran, 2011) y de sinestesia "mirror-touch" donde las personas sienten el tacto de otros (Maister, 2013).
However, the researchers are finding some differences between cases and controls on functional imaging, including increased spontaneous activity in the amygdala and the insula, and decreased spontaneous activity in the precuneus. "The overall findings on fMRI are that there's increased activity in the regions [of the brain] associated with fear and decreased connectivity between the frontal cortex and the amygdala," he said.
The visualized areas, robustly involving the frontal, precuneus, and posterior cingulate, and the parietotemporal cortices, appeared to correspond to the typical pattern of A[beta] accumulation in AD (Fig.
Specifically, males on average had larger volumes and higher tissue densities in the left amygdala, hippocampus, insular cortex, putamen; higher densities in the right VI lobe of the cerebellum and in the left claustrum; and larger volumes in the bilateral anterior parahippocampal gyri, posterior cingulate gyri, precuneus, temporal poles, and cerebellum, areas in the left posterior and anterior cingulate gyri, and in the right amygdala, hippocampus, and putamen.
In addition to the PIVC, projection targets of the vestibular nuclei also include the ventral and posterolateral thalamus, cerebellar nuclei (these also receive direct input from the vestibular organs), the superior temporal gyrus, the precuneus and inferior parietal lobule, the amygdala, the anterior cingulate cortex, and the locus coeruleus (Figure) (see Dieterich and Brandt [32]).