The Experts below are selected from a list of 237 Experts worldwide ranked by ideXlab platform

J. Peres Serra - One of the best experts on this subject based on the ideXlab platform.

Thomas Benke - One of the best experts on this subject based on the ideXlab platform.

  • Peduncular Hallucinosis
    Journal of Neurology, 2006
    Co-Authors: Thomas Benke
    Abstract:

    Peduncular Hallucinosis (PH) is a syndrome of hallucinations and brainstem symptoms which has only been described in single case reports. A detailed analysis of five patients was undertaken to investigate the clincial characteristics, hallucinations and behavioural abnormalities of PH in greater detail. Frequent clinical symptoms were oculomotor disturbances, impaired arousal, dysarthria and ataxia. In the chronic stage, sleep-wake cycle disturbances were common. Hallucinations were naturalistic, complex, scenic, mostly visual, but also combined visual-acoustic or visual-tactile and recurred stereotypically over months. Patients experienced their hallucinations as genuine and were unable to discriminate their percepts from reality. Neuropsychological testing disclosed severe impairments of episodic memory, occasionally coupled with confabulatory behaviour. By contrasty, memory for hallucinations remained intact. Deficits of attentional and executive functions were found in a subgroup of patients. Associated abnormal behaviours were common, comprising confusion, delusional misidentification for persons and places, and loss of disease awareness. PH appeared after focal lesions in various regions, such as the midbrain, thalamus and pons. These findings document that subcortical, brainstem-related hallucinations are vivid, recurring percepts that have a strong naturalistic character and are often associated with cognitive and behavioural abnormalities. It seems likely that brainstem Hallucinosis is caused by damage to ascending reticular systems and thalamocortical circuits. Available observations suggest that PH compromises cognitive functions which enable us to differentiate between illusionary percepts and reality, a reality monitoring system.

  • Peduncular Hallucinosis a syndrome of impaired reality monitoring
    Journal of Neurology, 2006
    Co-Authors: Thomas Benke
    Abstract:

    ■ Abstract Peduncular Hallucinosis (PH) is a syndrome of hallucinations and brainstem symptoms which has only been described in single case reports. A detailed analysis of five patients was undertaken to investigate the clincial characteristics, hallucinations and behavioural abnormalities of PH in greater detail. Frequent clinical symptoms were oculomotor disturbances, impaired arousal, dysarthria and ataxia. In the chronic stage, sleep-wake cycle disturbances were common. Hallucinations were naturalistic, complex, scenic, mostly visual, but also combined visual-acoustic or visual-tactile and recurred stereotypically over months. Patients experienced their hallucinations as genuine and were unable to discriminate their percepts from reality. Neuropsychological testing disclosed severe impairments of episodic memory, occasionally coupled with confabulatory behaviour. By contrasty, memory for hallucinations remained intact. Deficits of attentional and executive functions were found in a subgroup of patients. Associated abnormal behaviours were common, comprising confusion, delusional misidentification for persons and places, and loss of disease awareness. PH appeared after focal lesions in various regions, such as the midbrain, thalamus and pons. These findings document that subcortical, brain-stem-related hallucinations are vivid, recurring percepts that have a strong naturalistic character and are often associated with cognitive and behavioural abnormalities. It seems likely that brainstem Hallucinosis is caused by damage to ascending reticular systems and thalamocortical circuits. Available observations suggest that PH compromises cognitive functions which enable us to differentiate between illusionary percepts and reality, a reality monitoring system.

Seungdeuk Byun - One of the best experts on this subject based on the ideXlab platform.

  • case reports of Peduncular Hallucinosis in patients with pontine hemorrhage two cases report
    Annals of Rehabilitation Medicine, 2009
    Co-Authors: Ohsoo Shin, Soonmo Kwon, Donghwi Park, Seungdeuk Byun
    Abstract:

    Peduncular Hallucinosis that rarely reported in patients with brain stem lesion has several characteristics. The hallucination tends to be vivid, nonstereotypical images of person or animal. All the patients are aware that the hallucination is not part of reality. One of the suggested mechanisms of Peduncular Hallucinosis is imbalance among the cholinergic, serotonergic and other transmitting systems in the brain stem. We report two cases with typical features of Peduncular Hallucinosis which appeared about 30 and 12 months after pontine hemorrhage, respectively. We chose antipsychotics and selective serotonergic reuptake inhibitors for their medications, and their hallucinations disappeared about 2 months and 3 weeks after the medication, respectively. We suggest that Peduncular Hallucinosis should be considered in the patients with pontine hemorrhage if they complain of typical visual hallucinations.

A. Kiss - One of the best experts on this subject based on the ideXlab platform.

  • Peduncular Hallucinosis after sacrifice of veins of the petrosal venous complex for trigeminal neuralgia
    Acta Neurochirurgica, 2007
    Co-Authors: A. Koerbel, S. A. Wolf, A. Kiss
    Abstract:

    Peduncular Hallucinosis is characterized by striking visual images, highly colored and mobile, which are recognized by the patient as imaginary. A 50-year-old-man underwent microvascular decompression for a classical right sided trigeminal neuralgia. During the procedure, the petrosal vein and a transverse pontine vein were sacrificed for trigeminal decompression. On the second postoperative day, the patient developed Peduncular Hallucinosis that disappeared on the forth postoperative day. This is the third case in the literature of Peduncular Hallucinosis after obliteration of veins of the petrosal venous complex for trigeminal neuralgia. The best policy in cerebellopontine angle surgery is to preserve the petrosal vein whenever possible to avoid complications related to venous congestion.

  • brief report of special case Peduncular Hallucinosis after sacrifice of veins of the petrosal venous complex for trigeminal neuralgia
    2007
    Co-Authors: A. Koerbel, S. A. Wolf, A. Kiss
    Abstract:

    Peduncular Hallucinosis is characterized by striking visual images, highly colored and mobile, which are recognized by the patient as imaginary. A 50-year-old-man underwent microvascular decompression for a classical right sided trigeminal neuralgia. During the procedure, the petrosal vein and a transverse pontine vein were sacrificed for trigeminal decompression. On the second postoperative day, the patient developed Peduncular Hallucinosis that disappeared on the forth postoperative day. This is the third case in the literature of Peduncular Hallucinosis after obliteration of veins of the petrosal venous complex for trigeminal neuralgia. The best policy in cerebellopontine angle surgery is to preserve the petrosal vein whenever possible to avoid complications related to venous congestion.

Hulki Forta - One of the best experts on this subject based on the ideXlab platform.

  • Peduncular Hallucinosis three cases with thalamic involvement
    European Journal of Neurology, 1996
    Co-Authors: Destina A Yalcin, Z Yapici, Hulki Forta
    Abstract:

    Three cases with Peduncular Hallucinosis are described. The occurrence of complex visual hallucinations in each case were abrupt at the onset of the stroke. Two patients were free of hallucinations after a few days, while in the other they persisted. Magnetic resonance imaging (MRI) or computerized tomographic (CT) brain scan findings revealed thalamic involvement in these three patients.