scholarly journals Role of the parietooccipital fissure and its implications in the pathophysiology of posterior medial temporal gliomas

2021 ◽  
pp. 1-10
Author(s):  
Ichiyo Shibahara ◽  
Ryuta Saito ◽  
Masayuki Kanamori ◽  
Yukihiko Sonoda ◽  
Sumito Sato ◽  
...  
Keyword(s):  
Temporal Lobe ◽  
Tumor Invasion ◽  
Medial Temporal Lobe ◽  
Parietal Lobe ◽  
Occipital Lobe ◽  
Anatomical Landmark ◽  
Cingulate Gyrus ◽  
Posterior Border ◽  
Radiological Features ◽  
Invasion Patterns

OBJECTIVE The parietooccipital fissure is an anatomical landmark that divides the temporal, occipital, and parietal lobes. More than 40% of gliomas are located in these three lobes, and the temporal lobe is the most common location. The parietooccipital fissure is located just posterior to the medial temporal lobe, but little is known about the clinical significance of this fissure in gliomas. The authors investigated the anatomical correlations between the parietooccipital fissure and posterior medial temporal gliomas to reveal the radiological features and unique invasion patterns of these gliomas. METHODS The authors retrospectively reviewed records of all posterior medial temporal glioma patients treated at their institutions and examined the parietooccipital fissure. To clarify how the surrounding structures were invaded in each case, the authors categorized tumor invasion as being toward the parietal lobe, occipital lobe, isthmus of the cingulate gyrus, insula/basal ganglia, or splenium of the corpus callosum. DSI Studio was used to visualize the fiber tractography running through the posterior medial temporal lobe. RESULTS Twenty-four patients with posterior medial temporal gliomas were identified. All patients presented with a parietooccipital fissure as an uninterrupted straight sulcus and as the posterior border of the tumor. Invasion direction was toward the parietal lobe in 13 patients, the occipital lobe in 4 patients, the isthmus of the cingulate gyrus in 19 patients, the insula/basal ganglia in 3 patients, and the splenium of the corpus callosum in 8 patients. Although the isthmus of the cingulate gyrus and the occipital lobe are located just posterior to the posterior medial temporal lobe, there was a significantly greater preponderance of invasion toward the isthmus of the cingulate gyrus than toward the occipital lobe (p = 0.00030, McNemar test). Based on Schramm’s classification for the medial temporal tumors, 4 patients had type A and 20 patients had type D tumors. The parietooccipital fissure determined the posterior border of the tumors, resulting in a unique and identical radiological feature. Diffusion spectrum imaging (DSI) tractography indicated that the fibers running through the posterior medial temporal lobe toward the occipital lobe had to detour laterally around the bottom of the parietooccipital fissure. CONCLUSIONS Posterior medial temporal gliomas present identical invasion patterns, resulting in unique radiological features that are strongly affected by the parietooccipital fissure. The parietooccipital fissure is a key anatomical landmark for understanding the complex infiltrating architecture of posterior medial temporal gliomas.

Post-Stimulation Effect of Electroacupuncture at Yintang (EX-HN3) and GV20 on cerebral functional regions in healthy volunteers: A resting functional MRI study

2012 ◽  
Vol 30 (4) ◽  
pp. 307-315 ◽  
Author(s):  
Yu Zheng ◽  
Shanshan Qu ◽  
Na Wang ◽  
Limin Liu ◽  
Guanzhong Zhang ◽  
...  
Keyword(s):  
Frontal Lobe ◽  
Temporal Lobe ◽  
Parietal Lobe ◽  
Occipital Lobe ◽  
Cingulate Gyrus ◽  
Left Frontal Lobe ◽  
Posterior Cingulate Gyrus ◽  
Functional Regions ◽  
Limbic Lobe ◽  
The Right

Objective The aim of the present work was to observe the activation/deactivation of cerebral functional regions after electroacupuncture (EA) at Yintang (EX-HN3) and GV20 by functional MRI (fMRI). Design A total of 12 healthy volunteers were stimulated by EA at Yintang and GV20 for 30 min. Resting-state fMRI scans were performed before EA, and at 5 and 15 min after needle removal. Statistical parametric mapping was used to preprocess initial data, and regional homogeneity (ReHo) and amplitude of low-frequency fluctuation (ALFF) were analysed. Results ReHo at 5 min post stimulation showed increases in the left temporal lobe and cerebellum and decreases in the left parietal lobe, occipital lobe and right precuneus. At 15 min post stimulation, ReHo showed increases in the left fusiform gyrus; lingual gyrus; middle temporal gyrus; postcentral gyrus; limbic lobe; cingulate gyrus; paracentral lobule; cerebellum, posterior lobe, declive; right cuneus and cerebellum, anterior lobe, culmen. It also showed decreases in the left frontal lobe, parietal lobe, right temporal lobe, frontal lobe, parietal lobe and right cingulate gyrus. ALFF at 5 min post stimulation showed increases in the right temporal lobe, but decreases in the right limbic lobe and posterior cingulate gyrus. At 15 min post stimulation ALFF showed increases in the left frontal lobe, parietal lobe, occipital lobe, right temporal lobe, parietal lobe, occipital lobe and cerebellum, but decreases in the left frontal lobe, anterior cingulate gyrus, right frontal lobe and posterior cingulate gyrus. Conclusions After EA stimulation at Yintang and GV20, which are associated with psychiatric disorder treatments, changes were localised in the frontal lobe, cingulate gyrus and cerebellum. Changes were higher in number and intensity at 15 min than at 5 min after needle removal, demonstrating lasting and strong after-effects of EA on cerebral functional regions.

Double dissociation of memory capacities after bilateral occipital-lobe or medial temporal-lobe lesions

Brain ◽  
1995 ◽  
Vol 118 (5) ◽  
pp. 1129-1148 ◽  
Author(s):  
Margaret M. Keane ◽  
John D. E. Gabrieli ◽  
Heather C. Mapstone ◽  
Keith A. Johnson ◽  
Suzanne Corkin
Keyword(s):  
Temporal Lobe ◽  
Medial Temporal Lobe ◽  
Occipital Lobe ◽  
Double Dissociation ◽  
Temporal Lobe Lesions

scholarly journals Stable complexes of neuropsychiatric symptoms in patients with vascular dementia with different localization of brain pathological focuses

2020 ◽  
pp. 44-50
Author(s):  
Oleksandr Zlobin
Keyword(s):  
Vascular Dementia ◽  
Frontal Lobe ◽  
Temporal Lobe ◽  
Sleep Disturbances ◽  
Parietal Lobe ◽  
Neuropsychiatric Symptoms ◽  
Occipital Lobe ◽  
Pathological Process ◽  
Therapeutic Interventions ◽  
Affective Symptoms

The aim of the study was to determine the stable complexes of neuropsychiatric symptoms inherent in patients with vascular dementia with different localization of brain damage. 157 people with a diagnosis of vascular dementia were examined. Group 1 included 22 people with localization of the pathological process in the frontal lobe, group 2 — 18 patients with lesions of the temporal lobe, group 3 — 17 patients with lesions of the parietal lobe, group 4 — 15 patients with lesions of the occipital lobe, group 5 — 68 people with total defeat. All contingents are post-stroke patients over 50 years old, the average age is 68.12 years. Research methods: clinical-psychopathological, clinical-instrumental, experimental-psychological, anamnestic, clinical-statistical. The stable complexes (clusters) of neuropsychiatric symptoms inherent in patients with vascular dementia with different localization of brain lesions were determined. Revealing the following stable associations “localization — cluster”: frontal lobe — subpsychotic cluster (delusion — hallucinations — euphoria — agitation — depression); temporal lobe — asthenoanxiotic cluster (anxiety — irritability — agitation — sleep disturbances — apathy); parietal lobe — excitable-depressive cluster (depression — agitation — irritability — sleep disturbances); occipital lobe — affectocentric cluster (anxiety — depression — agitation — irritability); total defeat — asthenopathoideatoric cluster (apathy — irritability — agitation — anxiety — delirium). The identification of the association allows one to confidently determine the nature of the expected neuropsychiatric symptoms immediately after obtaining neuroimaging data regarding the localization of the lesion, which creates optimal conditions for the timely formation of a program of appropriate therapeutic interventions. Key words: vascular dementia, psychopathology, affective symptoms, neuropsychiatric symptoms, geriatric psychiatry

An Angiographically Occult Arteriovenous Malformation in the Medial Parietal Lobe Presenting as Seizures of Medial Temporal Lobe Origin

Epilepsia ◽  
1999 ◽  
Vol 40 (3) ◽  
pp. 377-381 ◽  
Author(s):  
Masami Fujii ◽  
Tatsuo Akimura ◽  
Satoshi Ozaki ◽  
Shoichi Kato ◽  
Haruhide Ito ◽  
...  
Keyword(s):  
Arteriovenous Malformation ◽  
Temporal Lobe ◽  
Medial Temporal Lobe ◽  
Parietal Lobe

scholarly journals Differences in fatty acid composition between cerebral brain lobes in juvenile pigs after fish oil feeding

2008 ◽  
Vol 100 (4) ◽  
pp. 794-800 ◽  
Author(s):  
Carla Dullemeijer ◽  
Peter L. Zock ◽  
Ruben Coronel ◽  
Hester M. Den Ruijter ◽  
Martijn B. Katan ◽  
...  
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Fish Oil ◽  
Acid Composition ◽  
Temporal Lobe ◽  
Parietal Lobe ◽  
Occipital Lobe ◽  
High Oleic ◽  
Brain Lobe ◽  
Fish Oil Diet

Very long-chain n-3 PUFA from fish are suggested to play a role in the development of the brain. Fish oil feeding results in higher proportions of n-3 PUFA in the brains of newborn piglets. However, the effect of fish oil on the fatty acid composition of specific cerebral brain lobes in juvenile pigs is largely uninvestigated. This study examined the effect of a fish oil diet on the fatty acid composition of the frontal, parietal, temporal and occipital brain lobes in juvenile pigs (7 weeks old). Pigs were randomly allocated to a semipurified pig diet containing either 4 % (w/w) fish oil (n 19) or 4 % (w/w) high-oleic acid sunflower oil (HOSF diet, n 18) for a period of 8 weeks. The fish oil diet resulted in significantly higher proportions (%) of DHA in the frontal (10·6 (sd1·2)), parietal (10·2 (sd1·5)) and occipital brain lobes (9·9 (sd 1·3)), but not in the temporal lobe (7·7 (sd1·6)), compared with pigs fed the HOSF diet (frontal lobe, 7·5 (sd1·0); parietal lobe, 8·1 (sd 1·3); occipital lobe, 7·3 (sd1·2), temporal lobe, 6·6 (sd1·2). Moreover, the proportion of DHA was significantly lower in the temporal lobe compared with the frontal, parietal and occipital brain lobes in pigs fed a fish oil diet. In conclusion, the brains of juvenile pigs appear to be responsive to dietary fish oil, although the temporal brain lobe is less responsive compared with the other three brain lobes. The functional consequences of these differences are a challenging focus for future investigation.

scholarly journals The timing of associative memory formation: frontal lobe and anterior medial temporal lobe activity at associative binding predicts memory

2011 ◽  
Vol 105 (4) ◽  
pp. 1454-1463 ◽  
Author(s):  
J. B. Hales ◽  
J. B. Brewer
Keyword(s):  
Prefrontal Cortex ◽  
Associative Memory ◽  
Temporal Lobe ◽  
Medial Temporal Lobe ◽  
Time Course ◽  
Parietal Lobe ◽  
Brain Regions ◽  
Memory Formation ◽  
Temporal Separation ◽  
Temporal Aspect

The process of associating items encountered over time and across variable time delays is fundamental for creating memories in daily life, such as for stories and episodes. Forming associative memory for temporally discontiguous items involves medial temporal lobe structures and additional neocortical processing regions, including prefrontal cortex, parietal lobe, and lateral occipital regions. However, most prior memory studies, using concurrently presented stimuli, have failed to examine the temporal aspect of successful associative memory formation to identify when activity in these brain regions is predictive of associative memory formation. In the current study, functional MRI data were acquired while subjects were shown pairs of sequentially presented visual images with a fixed interitem delay within pairs. This design allowed the entire time course of the trial to be analyzed, starting from onset of the first item, across the 5.5-s delay period, and through offset of the second item. Subjects then completed a postscan recognition test for the items and associations they encoded during the scan and their confidence for each. After controlling for item-memory strength, we isolated brain regions selectively involved in associative encoding. Consistent with prior findings, increased regional activity predicting subsequent associative memory success was found in anterior medial temporal lobe regions of left perirhinal and entorhinal cortices and in left prefrontal cortex and lateral occipital regions. The temporal separation within each pair, however, allowed extension of these findings by isolating the timing of regional involvement, showing that increased response in these regions occurs during binding but not during maintenance.

scholarly journals Psychopathological peculiarities of vascular dementia with different localization of pathological focuses

2020 ◽  
Keyword(s):  
Vascular Dementia ◽  
Brain Damage ◽  
Temporal Lobe ◽  
Parietal Lobe ◽  
Neuropsychiatric Symptoms ◽  
Low Frequency ◽  
Occipital Lobe ◽  
Vascular Lesions ◽  
Early Application ◽  
Wide Range

Relevance. Vascular dementia, caused by various organic lesions, volume and location of organic damage to brain tissue, manifests itself in a wide range of concomitant neuropsychiatric symptoms. However, despite the obvious link between the location of vascular lesions and the patient's psychopathological symptoms, the effects of the physical characteristics of the brain damage that caused the vascular dementia and the corresponding neuropsychiatric symptoms remain poorly understood. The aim of the study was to investigate psychopathological features of cognitive impairment in patients with vascular dementia depending on the location of the lesion. Contingents and methods. 157 people with a diagnosis of vascular dementia were examined, divided into five groups: group 1 — 22 people with localization of the pathological process in the frontal lobe; group 2 — 18 patients with temporal lobe lesions; group 3 — 17 patients with parietal lobe lesions; group 4 — 15 patients with occipital lobe lesions and group 5 — 68 people with total lesions. Results: It was found that the lesion of the frontal lobes is characterized by a high frequency of euphoria and hallucinatory phenomena, as well as minor manifestations of apathy and anxiety; lesion of the temporal lobe — the highest frequency and severity of apathy; parietal lesions — low frequency of anxiety combined with its high intensity; occipital lesions — intense depressive experiences (in cases where they occurred), total brain damage — the lowest prevalence and intensity of delusional feelings, irritability and agitation. Conclusions. A comprehensive study of patients with vascular dementia identified specific to each localization of brain lesions spectra of neuropsychiatric symptoms, which creates the necessary conditions for early application of differentiated therapeutic and rehabilitation measures and, accordingly, to improve the quality of patients life in this category.

Spatiotemporal memory and rate of forgetting in acute schizophrenics

1988 ◽  
Vol 18 (4) ◽  
pp. 843-853 ◽  
Author(s):  
Mohammed A. Shoqeirat ◽  
Andrew R. Mayes
Keyword(s):  
Temporal Lobe ◽  
Cognitive Deficits ◽  
Medial Temporal Lobe ◽  
Parietal Lobe ◽  
Unknown Origin ◽  
Wisconsin Card Sorting Test ◽  
Type I ◽  
Card Sorting ◽  
Temporal Lobe Lesions ◽  
Sorting Test

SynopsisSome schizophrenics show anomalies in the frontal and temporal lobes. It is uncertain whether the cognitive deficits shown by Type I schizophrenics are caused directly by such anomalies, or by a deficit in the exertion of attentional effort. In this study, 16 acute schizophrenics, who broadly fitted the Type I characterization and their controls were given a battery of cognitive tests. The patients were impaired on effort-demanding tasks such as the Wisconsin Card Sorting Test, a verbal fluency test and the WAIS, which are susceptible in varying degrees to frontal, temporal and parietal lobe lesions. Patients were not disproportionately impaired, however, on a test of temporal memory and another of spatial memory, an impairment pattern that selectively reflects frontal and medial temporal lobe lesions respectively, nor were they impaired on a rate of forgetting task sensitive to medial temporal lobe lesions. These tasks were chosen not only because performance on them is selectively sensitive to frontotemporal lobe lesions, but also because it seems to depend on exerting minimum amounts of attentional effort. It is tentatively concluded that the cognitive deficits shown by Type I schizophrenics are caused by a problem in exerting attentional effort of unknown origin.

scholarly journals Worth the Wait: Delayed Recall after 1 Week Predicts Cognitive and Medial Temporal Lobe Trajectories in Older Adults

2020 ◽  
pp. 1-7
Author(s):  
Cutter A. Lindbergh ◽  
Nicole Walker ◽  
Renaud La Joie ◽  
Sophia Weiner-Light ◽  
Adam M. Staffaroni ◽  
...  
Keyword(s):  
Older Adults ◽  
Executive Functioning ◽  
Temporal Lobe ◽  
Gray Matter ◽  
Medial Temporal Lobe ◽  
Neuropsychological Testing ◽  
Occipital Lobe ◽  
Delayed Recall ◽  
Age Related ◽  
Gray Matter Volumes

Abstract Objective: We evaluated whether memory recall following an extended (1 week) delay predicts cognitive and brain structural trajectories in older adults. Method: Clinically normal older adults (52–92 years old) were followed longitudinally for up to 8 years after completing a memory paradigm at baseline [Story Recall Test (SRT)] that assessed delayed recall at 30 min and 1 week. Subsets of the cohort underwent neuroimaging (N = 134, mean age = 75) and neuropsychological testing (N = 178–207, mean ages = 74–76) at annual study visits occurring approximately 15–18 months apart. Mixed-effects regression models evaluated if baseline SRT performance predicted longitudinal changes in gray matter volumes and cognitive composite scores, controlling for demographics. Results: Worse SRT 1-week recall was associated with more precipitous rates of longitudinal decline in medial temporal lobe volumes (p = .037), episodic memory (p = .003), and executive functioning (p = .011), but not occipital lobe or total gray matter volumes (demonstrating neuroanatomical specificity; p > .58). By contrast, SRT 30-min recall was only associated with longitudinal decline in executive functioning (p = .044). Conclusions: Memory paradigms that capture longer-term recall may be particularly sensitive to age-related medial temporal lobe changes and neurodegenerative disease trajectories.

scholarly journals The relevant resting-state brain activity of ecological microexpression recognition test (EMERT)

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0241681
Author(s):  
Ming Yin ◽  
Jianxin Zhang ◽  
Deming Shu ◽  
Dianzhi Liu
Keyword(s):  
Recognition Test ◽  
Temporal Lobe ◽  
Resting State ◽  
Parietal Lobe ◽  
Brain Activity ◽  
Occipital Lobe ◽  
Frontal Lobes ◽  
Brain Areas ◽  
Eyes Closed ◽  
Eyes Open

Zhang, et al. (2017) established the ecological microexpression recognition test (EMERT), but it only used white models’ expressions as microexpressions and backgrounds, and there was no research detecting its relevant brain activity. The current study used white, black and yellow models’ expressions as microexpressions and backgrounds to improve the materials ecological validity of EMERT, and it used eyes-closed and eyes-open resting-state fMRI to detect relevant brain activity of EMERT for the first time. The results showed: (1) Two new recapitulative indexes of EMERT were adopted, such as microexpression M and microexpression SD. The participants could effectively identify almost all the microexpressions, and each microexpression type had a significantly background effect. The EMERT had good retest reliability and calibration validity. (2) ALFFs (Amplitude of Low-Frequency Fluctuations) in both eyes-closed and eyes-open resting-states and ALFFs-difference could predict microexpression M. The relevant brain areas of microexpression M were some frontal lobes, insula, cingulate cortex, hippocampus, parietal lobe, caudate nucleus, thalamus, amygdala, occipital lobe, fusiform, temporal lobe, cerebellum and vermis. (3) ALFFs in both eyes-closed and eyes-open resting-states and ALFFs-difference could predict microexpression SD, and the ALFFs-difference was more predictive. The relevant brain areas of microexpression SD were some frontal lobes, insula, cingulate cortex, cuneus, amygdala, fusiform, occipital lobe, parietal lobe, precuneus, caudate lobe, putamen lobe, thalamus, temporal lobe, cerebellum and vermis. (4) There were many similarities and some differences in the relevant brain areas between microexpression M and SD. All these brain areas can be trained to enhance ecological microexpression recognition ability.

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