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  • 1
    ISSN: 1435-1463
    Keywords: Citalopram ; serotonin ; cerebrospinal fluid ; rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We studied changes in the concentrations of 5-hydroxytryptamine (5-HT), other indoleamines, and catecholamines in the cerebrospinal fluid (CSF) of freely-moving rats that had been administered citalopram, ±1-[3-(Dimethylamino)propyl)-1-(4-fluorophenyl)-1, 3-dihydro-5-isobenzofurancarbonitrile hydrobromide), a selective inhibitor of 5-HT uptake. In a microdialysis experiment, the intracerebral extracellular free 5-HT increased significantly, peaking 60 to 90 min after citalopram (30 mg/kg p.o.) was administerd. The 5-HT concentrations in CSF from the cisterna magna increased significantly, reaching a maximum 6 hours after a single dose of citalopram (30 mg/kg p.o.) was given. Six hours after this dose, the CSF 5-HT concentration in the cisterna magna was significantly increased, and the 5-hydroxyindoleacetic acid (5-HIAA) concentration was significantly decreased. There were non-significant changes in the other indoleamines (tryptophan, 5-hydroxytryptophan, and kynurenine) and in the catecholamines (dopamine, homovanillic acid, normetanephrine, and 3-methoxy-4-hydroxyphenethyleneglycol). The 5-HT/tryptophan ratio was correlated significantly with the kynurenine/tryptophan ratio before treatment with citalopram (r=0.81, p=0.051), indicative that there is coordination of the serotonin and kynurenine pathways in normal rats. In the animals posttreatment there was no such correlation, suggesting that the changes in 5-HT are independent of the kynurenine system at least within the 6 hours postreatment. These CSF results appear to reflect selective inhibition of 5-HT uptake in brain tissues by citalopram that is not associated with changes in catecholamines.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1084
    Keywords: Aberrant internal carotid artery ; Congenital absence of the internal carotid artery ; CT ; MRI ; MR angiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We retrospectively reviewed the imaging features of an aberrant course of the internal carotid artery (ICA) in one patient and its unilateral absence in four. Absence of the ICA was initially detected by MRI and MR angiography in both patients who underwent these examinations. CT revealed an abnormal or absent carotid canal in all cases. Radiological diagnosis by MRI and MR angiography could play an important role in the diagnosis.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Neuroradiology 38 (1996), S. 456-457 
    ISSN: 1432-1920
    Keywords: Key words Diploë ; Haemangioma ; Epidural haematoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A 72-year-old female with intradiploic haemangioma associated with epidural haematoma is reported. MRI finding of the lesion is described. The cause of the epidural haematoma is speculated due to fragile vessels attached directly to dura mater through the pores of the inner table of the diploë.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Neuroradiology 38 (1996), S. 456-457 
    ISSN: 1432-1920
    Keywords: Diploë ; Haemangioma ; Epidural haematoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A 72-year-old female with intradiploic haemangioma associated with epidural haematoma is reported. MRI finding of the lesion is described. The cause of the epidural haematoma is speculated due to fragile vessels attached directly to dura mater through the pores of the inner table of the diploë.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    European radiology 7 (1997), S. 464-469 
    ISSN: 1432-1084
    Keywords: Key words: Craniopharyngioma ; MR ; CT
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. We reviewed imaging findings of CT and MR imaging in 20 cases of surgically confirmed craniopharyngioma in an attempt to determine their relation to patterns of tumor extent. The relationship between these patterns and the frequency of preoperative CT diagnosis and MR imaging diagnosis according to the surgical diagnosis were determined. The CT technique was superior to MR imaging in the detection of calcification. The MR imaging technique was superior to CT for determining tumor extent and provided valuable information about the relationships of the tumor to surrounding structures. Thus, CT and MR imaging have complementary roles in the diagnosis of craniopharyngiomas. In cases of possible craniopharyngioma, noncontrast sagittal T1-weighted images may enable the identification of the normal pituitary, possibly leading to the correct diagnosis.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1435-1463
    Keywords: Alzheimer type dementia ; vascular dementia of the Binswanger type ; serotonin ; kynurenine ; citalopram ; cerebrospinal fluid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We studied changes in the concentrations of serotonin (5-HT), kynurenine, and other indoleamines in the cerebrospinal fluid of patients with Alzheimer type dementia (ATD) and those with Binswanger type vascular dementia (VDBT), and changes in these indoleamine concentrations 2 weeks after administration of citalopram, a 5-HT uptake inhibitor. The concentrations of total 5-HT (p〈0.005) and kynurenine (p〈0.005) were significantly decreased in ATD patients in comparison to those of the controls. After citalopram administration, there was a remarkable increase in 5-HT concentration (249%, p〈0.0001) and a significant decrease in 5-HIAA concentration (22%, p〈0.02). In the VDBT patients, only 5-HT showed a significant decrease (p〈0.005) in comparison to the control values. It also increased significantly (214%) after citalopram administration. The 5-HT/tryptophan and kynurenine/tryptophan ratios were not correlated for the controls, but did significantly for the ATD and VDBT patients; after citalopram treatment, the increase in 5-HT/tryptophan was correlated significantly with that of kynurenine/tryptophan for ATD, but not for VDBT. These results suggest that both the serotonin and kynurenine pathways are impaired in ATD; whereas, the serotonin pathway alone is in VDBT, and that these impairments are ameliorated by the administration of citalopram.
    Type of Medium: Electronic Resource
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