Collegium antropologicum
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Collegium antropologicum · Jan 2008
ReviewDistinct origin of GABA-ergic neurons in forebrain of man, nonhuman primates and lower mammals.
In this mini-review we present recent data about origin of GABA-ergic (gama-aminobutyric acid) neurons in the mammalian forebrain, including the diencephalon and telencephalon. The interest in GABA-ergic neurons, which in cerebral cortex mostly correspond to local circuit neurons (interneurons), has increased in the past decade. Many studies have shown that in lower mammals all hippocampal and almost all neo-cortical GABA-ergic neurons are born in the specific region named ganglionic eminence, and not locally in proliferative layers all around telencephalic vesicle. ⋯ In this review we focus on specific events underlying GABA-ergic neuron development in human and non-human primates. Disturbances of the GABAergic network are found in many neurological and psychiatric disorders, some of them might result from altered production or migration of these neurons during development. Therefore, it is crucial to understand human-specific mechanisms that regulate the development of GABA-ergic neurons.
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Collegium antropologicum · Jan 2008
Changes of the corpus callosum in children who suffered perinatal injury of the periventricular crossroads of pathways.
There is a high incidence of periventricular leukomalacia, caused by hypoxia-ischemia, in preterm infants. These lesions damage the periventricular crossroads of commissural, projection and associative pathways, which are in a close topographical relationship with the lateral ventricles. We explored to what extent abnormalities of echogenicity of the periventricular crossroads correlate with changes in size of the corpus callosum. ⋯ Corpus callosum mediosagittal area measurements were performed using magnetic resonance images, acquired between the first and sixth postnatal month (postmenstrual age 40-49 weeks). We found a statistically significant correlation between the increased echogenicity in the crossroad areas and the decrease of the corpus callosum midsagittal area (p < 0.05). This supports the hypothesis that callosal fibers can be damaged, during growth through the periventricular crossroads of pathways.
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Collegium antropologicum · Jan 2008
Dynamic in prescribing antipsychotic drugs during five year period (2001-2005) in the Psychiatric Hospital Vrapce, Zagreb, Croatia.
Aim of this study was to determine changes in prescribing antipsychotics during 5 year period in Psychiatric Hospital VrapEe. Data about type of antipsychotic medication, ward and gender were collected for all patients receiving antipsychotics on 1st of October. During 5 year period decrease in prescribing classical antipsychotics was observed while prescribing of atypical antipsychotics has shown increase. ⋯ Data for forensic and emergency ward was analyzed separately and trends similar to hospitals were noticed here. Rationalizing use of antipsychotics can decrease cost of treatment, decrease negative effects of antipsychotics and consequently improve the treatment. Through systematic studies of this type positive progress and changes in the prescribing of antipsychotics are possible.
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Collegium antropologicum · Jan 2008
Fluid perfusion as a method of cerebrospinal fluid formation rate--critical appraisal.
The aim of the study was to evaluate whether or not cerebrospinal fluid formation rate (Vf) calculated according to the equation of Heisey et al., truly show the produced cerebrospinal fluid. For this reason Vf was simulated (40.6 microL/min) by an infusion pump in a plastic cylinder and the evaluation was done by comparing the results obtained between the calculated Vf and the simulated one. ⋯ If the equation is correct, the calculated Vf for sacrificed animals should be zero, because there is no Vf in dead animals. The fact that the calculated Vf (46.5 microL/min) in the plastic cylinder was different (p < 0.0001) from the simulated one (40.6 microL/min) and that Vf was calculated even for dead animals (3-5 microL/min) clearly shows the that perfusion method may not be an accurate method for determination of Vf.
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Collegium antropologicum · Jan 2008
The effect of repeated daily measurements on paw withdrawal latencies in Hargreaves test.
The hypothesis that repeated measurements during 4 subsequent days affect withdrawal latencies in Hargreaves test was investigated. Paw withdrawal latencies to radiant heat were determined in the control, tramadol or saline group of male Wistar rats. The control group (N=10) had no treatment. ⋯ When compared to the control group, the effect of tramadol, was noted from the second to forth day (p < 0.01 Bonferroni test), but not on the first day. Finally, a tendency to decrement in withdrawal latencies existed on day 1 in the saline group compared with control group, but this difference does not reach significance. We conclude that one day of training affect withdrawal latencies in the Hargreaves test.