Parieto-occipital Area

The tumor appeared as a large, well-circumscribed echogenic mass in the right parieto-occipital area on US.  

Brain computed tomography scan showed high-density lesions in the left parieto-occipital area suggesting subcortical cerebral hemorrhage.  

In addition, he had a patch of white hair on the right parieto-occipital area overlying a scalp neurofibroma.  

RESULTS: As for deep white matter hyperintensity (DWMH), LOM exhibited higher ratings than EOM; as for brain areas, significant between-group differences were detected in the bilateral frontal areas and in the left parieto-occipital area. The frontal areas and the left parieto-occipital area would be important for the development of late-onset mood disorders..  

By contrast, mainly peripheral field representations of V4 are connected with occipitoparietal areas DP (dorsal prelunate area), VIP (ventral intraparietal area), LIP (lateral intraparietal area), PIP (posterior intraparietal area), parieto-occipital area, and MST (medial STS area), and parahippocampal area TF (cytoarchitectonic area TF on the parahippocampal gyrus).  

Retrogradely labeled cells were located within the arcopallium, the hyperpallium apicale (HA) and the temporo-parieto-occipital area (TPO).  

CASE REPORT: A young aphasic patient study is reported who, after a cerebral haemorrhagia in the left temporo-parieto-occipital area, shows significant semantic difficulties.  

We recorded neural activity from the medial parieto-occipital area V6A while three monkeys performed an instructed-delay reaching task in the dark.  

The cerebral cortex of three macaque monkeys, electrophysiologically studied in chronic preparations in order to recognize functionally the medial parieto-occipital area V6, was reconstructed using the software CARET. In particular, a comparison of the location and extent of the medial parieto-occipital areas V6 and PO indicates that area PO occupies different locations according to different authors but in general includes parts of both areas V6 and V6A.  

To determine the connectivity of CDL, and to distinguish CDL from the rostrally adjacent temporo-parieto-occipital area (TPO), injections of neural tracers were made into the caudal superficial pallium at various rostrocaudal levels.  

METHODS: A 17-year-old epilepsy patient underwent invasive monitoring with subdural electrodes in the right temporo-parieto-occipital area.  

Two separate tumors were operated on within six months: the first one was localized in the left parieto-occipital area, and the other in the right temporal lobe.  

Positive ERP waves were evoked by Targets and Non-targets in the parieto-occipital area around 300-700 ms after stimulus onset.  

The tumors were located in the posterior parieto-occipital area in six cases and the mean diameter of mass of these tumors was 5.3 cm.  

Focal lesions and progressing atrophy mainly of the basal ganglia and the temporo-parieto-occipital area with preservation of hippocampal and entorhinal structures were present.  

The strongest projections to PMd arise from the superior parietal lobule, including the medial intraparietal area (MIP), PEc and PGm, and the parieto-occipital area.  

The latter potentials were dominant in the parieto-occipital area.  

The patients were 15-year-old and 3-month-old girls, who each had a hard, nonpulsatile, nonreducible lump covered by alopecic scalp in the parieto-occipital area.  

The results show that parieto-occipital area V6A is reciprocally connected with F7, and receives a smaller projection from F2.  

The lesion was located in the deep sylvian fissure in one patient, the fronto-parieto-occipital area in one and the trigone in two.  

Her magnetic resonance imaging (MRI) showed an old cerebral infarction in the left parieto-occipital area, in addition to ischemic changes in the bilateral deep white matter.  

MRI identified a mass in the right parieto-occipital area.  

Radiologically, a leptomeningeal (pial) capillary and venous malformation, mostly located in the parieto-occipital area, cerebral atrophy and calcifications are demonstrated.  

These included the left occipitotemporal area, the right parieto-occipital area, and the right posterior frontal region.  

The short-echo-time MR spectrum acquired in the parieto-occipital area was characterised by global loss of signal and accumulation of lactate.  

In three cases the tumors were primary neoplasms arising from the sellar region, base of the occiput and the parieto-occipital area.  

Magnetic resonance imaging showed in one case parieto-occipital pachygyria and in the other there was marked pachygyria, most pronounced over the parieto-occipital area.  

The lesion located in the left parieto-occipital area was compatible with the field defect observed.  

Echodensities, especially in the parieto-occipital area, affected the quality of general movements.  

If the mean spectral theta amplitude across the parieto-occipital area decreases from IMC80 to IMC100 then the isometric contraction is taken to be performed with maximal effort; B.  

MRI showed wide T2-high signal lesions in the right temporo-parieto-occipital area.  

A power spectra corresponding to slow wave showed an increase at parieto-occipital area in 1st and 5th postoperative day.  

Alpha rhythm of the parieto-occipital area is comprised of a parade of short-lived cortical excitations (alphons), each of which exhibits oscillations having a stable period within the alpha bandwidth.  

SD was elicited on the frontal cortical surface by 1-min application of 2% KCl and its appearance was recorded (ECoG and DC potential) at two points in the parieto-occipital area of the same hemisphere.  

In the case reported on, critical reduction of regional cerebral blood flow (rCBF) was observed during re-build-up phenomenon in the bilateral parieto-occipital area where acetazolamide testing revealed severe impairment of the perfusion reserve.  

We found a projection to the dorsal premotor cortex from the parieto-occipital area (PO).  

Brain computed tomographic scan showed encephalomalacia in the right parieto-occipital area and recent hypodensity in the left temporoparieto-occipital area with cortical atrophy.  

The theta power across the parieto-occipital area decreases from rest through movements performed with submaximal force to movements performed with maximal effort.  

With respect to the SEPs on the right hemisphere, the only components remaining were the initial negativity (N20 with latency of about 20 msec) recorded in the parieto-occipital area, which exhibited polarity inversion across the central sulcus.  

Brain images showed atrophy and hypoperfusion in the parieto-occipital area.  

Computed tomographic scanning showed a single ring enhancing lesion in the right parieto-occipital area.  

CT scan disclosed hematoma in the right parieto-occipital area.  

Measurements of latencies of the nasalis muscle response, obtained while the stimulating coil was placed over the parieto-occipital area of the scalp, indicated that it was the labryinthine segment of the facial canal, 5 to 16 mm distal to the CPA, that was activated.  

The patient presented with a swelling in the right parieto-occipital area and paresis of the upper left limb; there was no clear history of trauma.  

CT of the brain demonstrated presence of an ischaemic focus in the temporo-parieto-occipital area.  

During seizures, EEG showed discharges in the parieto-occipital area in two cases and in the mid-temporal area in one.  

Density was moderate in the fronto-parieto-occipital area (female), on the loin and buttocks, in the upper costal, lower caudo-costal, xiphoid-umbilical and umbilical-pubic areas, and on the lateral surface of the forearm.  

CT disclosed an intracerebral hemorrhage in the right parieto-occipital area.  

The results include the following: Three positive potentials were associated with REM: a sharp potential in the parieto-occipital area just before REM onset; a large, slow potential in the vertex area 140-180 msec after REM onset; and a potential in the occipital area 210-280 msec after REM onset. Three positive potentials, one being the so-called EM-antecedent potential and the others being the lambda response, were associated with the waking saccades toward targets: a sharp potential in the parieto-occipital area just before the saccade onset and two potentials in the occipital area with latencies of 140-150 and 260-310 msec from the saccade onset.  

Striking, statistically significant, alterations were observed in the left temporo-parieto-occipital area (fig.  

Nine months later, a lymphoma of the left parieto-occipital area was discovered.  

With eyes closed the dominant activity in the parieto-occipital area showed an increase from 7.7 to 8.5 Hz. The amplitude of 40-50 microV in the parieto-occipital areas was higher than in the frontal and temporal areas (25-30 microV).  

In CT scan findings, separate mass lesions were observed in the right parieto-occipital area, left parietal lobe and left thalamic region.  

A emergency CT scan revealed a round high density area suggesting intracerebral hematoma at the right parieto-occipital area.  

In the second experiment, an impact of 9000 gm-cm was delivered to the midline parieto-occipital area of the rat and produced concussion-like phenomena similar to those elicited in mice.  

It was corrected successfully by a free bone graft to the outer table from the parieto-occipital area, partly covered by a flap of periosteum from the same area..  

We discuss the following points: 1) the patient's disease must be considered as Binswanger's subcortical encephalopathy despite the asymetric topography of the lesions ; 2) particular hemodynamic cerebral factors has possibly determined the asymetric nature of the disease ; 3) a lesion of the left temporo-parieto-occipital area that was strictly sub-cortical, with complete destruction of the posterior part of the arcuate fasciculus has presented with the clinical picture of a transcortical sensorial aphasia..  

An amplitude hypovariability in the central regions, probably associated with hyperarousal, especially in the left hemisphere, can then be observed in hebephrenics, together with high alpha intensity on the left parieto-occipital area.  

These results suggest that the posterior parieto-occipital area is involved in making associations across dimensions with in the visual modality.  

Some years later, she sustained a subarachnoid hemorrhage from an arteriovenous malformation in the right parieto-occipital area, which was successfully excised.  

Reaction to a complex visual stimulus, characterized by differences of EP to fase and checker-board patterns, had maximal manifestation in the temporo-parieto-occipital area.  

EEG showed paroxysmal slowing focus in the right parieto-occipital area.  

The EEG during wakefulness and sleep showed multifocal independent spikes over the left mid-temporal and right parieto-occipital area.  

The autor came to the following conclusions: 1--there is a clear correlation between the electroenecephalographic abnormalities and the degree of cerebral injury characterized by the duration of unconsciousness, presence of localizing neurological signs, presence of bloody cerebrospinal fluid and post-traumatic epilepsy; 2 - slow wave activity over the parieto-occipital area is more frequent in the age group up to 10 years; 3 - the proportion of abnormal electroencephalograms decreases particularly after the 1st month post-trauma; 4 - diffuse or focal slow activity decreased principally after the 1st month post-trauma; 5 - paroxysmal abnormalities increase proportionaly after the 6th month post-trauma; 6 - patients with intracranial hematoma present great proportion of abnormalities, particularly depressions.  

[ View All ]