675 research outputs found
Music Hospital: An acceptability study of music therapy activities in a psychiatric ward through listening and analysis of author tunes
No full text: A study was conducted on the acceptability of a music therapy intervention in a group context, in a psychiatric ward where people with acute psychopathological conditions are hospitalized. The objectives of the intervention are both therapeutic (stress reduction) and informative-descriptive, on topics ranging from stress management, to the first signs of crisis and drugs. For this purpose, musical stimuli provided by the presentation, listening and analysis of author's pieces were used, through the diffusion of pleasant sounds at moderate rhythm and volume among patients and operators. Acceptability was assessed through a satisfaction questionnaire. The responses to the questionnaire were very positive, confirming the narrative observations of the operators who found favorable ways of interacting with the patients with whom they shared the activity in all its contents. Participation in the music therapy intervention in a group context led users to an improvement in their stress management skills and to a more positive adaptation to the condition of hospitalization
Viewer-centered frame of reference for pointing to memorized targets in three-dimensional space
No full textPointing to a remembered visual target involves the transformation of binocular visual information into an appropriate motor output. Errors generated during pointing tasks may indicate the reference frames used by the CNS for the transformation and storage of the target position. Previous studies have proposed eye-, shoulder-, or hand-centered reference frames for various pointing tasks, depending on visual conditions. We asked subjects to perform pointing movements to remembered three-dimensional targets after a fixed memory delay. Pointing movements were executed under dim lighting conditions, allowing vision of the fingertip against a uniform black background. Subjects performed repeated movements to targets distributed uniformly within a small (radius 25 mm) workspace volume. In separate blocks of trials, subjects pointed to different workspace regions that varied in terms of distance and direction from the head and shoulder. Additional blocks were performed that differed in terms of starting position, effector hand, head rotation, and memory delay duration. Final pointing positions were quantified in terms of the constant and variable errors in three dimensions. The orientation of these errors was examined as a function of workspace location to identify the underlying reference frames. Subjects produced anisotropic patterns of variable error, with greater variability for endpoint distances from the body. The major axes of the variable-error tolerance ellipsoids pointed toward the eyes of the subject, independent of workspace region, effector hand (left or right), initial hand position, and head rotations. Constant errors were less consistent across subjects, but also tended to point toward the head and body. Both overshoots and undershoots of the target position were observed. Increasing the duration of the memory delay period increased the size but did not alter the orientation of the variable-error ellipsoids. Variability of the endpoint positions increased equally in all three Cartesian directions as the memory delay increased from 0.5 to 8.0 s. The anisotropy of variable errors indicates a viewer-centered reference frame for pointing to remembered visual targets with vision of the finger. The anisotropy of pointing variability stems from variability in egocentric binocular cues as opposed to reliance on allocentric visual references or to specific approximations in the sensorimotor transformation. Nevertheless, observed increases in variability with longer memory delays indicate that the short-term storage of the target position does not simply mirror the retinal and ocular sensory signals of the visually acquired target location. Thus spatial memory is carried out in an internal representation that is viewer-centered but that may be isotropic with respect to Cartesian space
Temperament and Character Inventory – Revised (TCI–R) 1 year after the earthquake of L’Aquila (Italy). Personality and Individual Differences 51 (2011) 545–548
No full textShort-term memory for reaching to visual targets: Psychophysical evidence for body-centered reference frames
No full textPointing to a remembered visual target involves the transformation of visual information into an appropriate motor output, with a passage through short-term memory storage. In an attempt to identify the reference frames used to represent the target position during the memory period, we measured errors in pointing to remembered three-dimensional (3D) targets. Subjects pointed after a fixed delay to remembered targets distributed within a 22 mm radius volume, Conditions varied in terms of lighting (dim light or total darkness), delay duration (0.5, 5.0, and 8.0 sec), effector hand (left or right), and workspace location. Pointing errors were quantified by 3D constant and variable errors and by a novel measure of local distortion in the mapping from target to endpoint positions. The orientation of variable errors differed significantly between light and dark conditions. Increasing the memory delay in darkness evoked a reorientation of variable errors, whereas in the light, the viewer-centered variability changed only in magnitude. Local distortion measurements revealed an anisotropic contraction of endpoint positions toward an "average" response along an axis that points between the eyes and the effector arm. This local contraction was present in both lighting conditions. The magnitude of the contraction remained constant for the two memory delays in the light but increased significantly for the longer delays in darkness. These data argue for the separate storage of distance and direction information within short-term memory, in a reference frame tied to the eyes and the effector arm
Analysis of pointing errors reveals properties of data representations and coordinate transformations within the central nervous system
No full textThe execution of a simple painting task invokes a chain of processing that includes visual acquisition of the target, coordination of multimodal proprioceptive signals, and ultimately the generation of a motor command that will drive the finger to the desired target location. These processes in the sensorimotor chain can be described in terms of infernal representations of the target or limb positions and coordinate transformations between different internal reference frames. In this article we first describe how different types of error analysis can be used to identify properties of the internal representations and coordinate transformations within the central nervous system. We then describe a series of experiments in which subjects pointed to remembered 3D visual targets under two lighting conditions (dim light and total darkness) and after two different memory delays (0.5 and 5.0 s) and report results in terms of variable error, constant error, and local distortion. Finally, we present a set of simulations to help explain the patterns of errors produced in this pointing task. These analyses and experiments provide insight into the structure of the underlying sensorimotor processes employed by the central nervous system
Cognitive allocentric representations of visual space shape pointing errors
No full textSubjects reached in three-dimensional space to a set of remembered targets whose position was varied randomly from trial to trial, but always fell along a "virtual" line (line condition). Targets were presented briefly, one-by-one and in an empty visual field. After a short delay, subjects were required to point to the remembered target location. Under these conditions, the target was presented in the complete absence of allocentric visual cues as to its position in space. However, because the subjects were informed prior to the experiment that all targets would fall on a straight line, they could conceivably imagine each point target as belonging to a single rigid object with a particular geometry and orientation in space, although this virtual object was never explicitly shown to the subjects. We compared the responses to repeated measurements of each target with those measured for targets presented in a directionally neutral configuration (sphere condition), and used the variable errors to infer the putative reference frames underlying the corresponding sensorimotor transformation. Performance in the different tasks was compared under two different lighting conditions (dim light or total darkness) and two memory delays (0.5 or 5 s). The pattern of variable errors differed significantly between the sphere condition and the line condition. In the former case, the errors were always accounted for by egocentric reference frames. By contrast the errors in the line condition revealed both egocentric and allocentric components, consistent with the hypothesis that target information can be defined concurrently in both egocentric and allocentric frames of reference, resulting in two independent coexisting representations
Selective stenting and the course of atherosclerotic renovascular nephropathy
No full textBACKGROUND: The effectiveness of percutaneous revascularisation (PTRA) in the treatment of atherosclerothic renovascular nephropathy (ARN), a leading cause of progressive renal failure, is still a matter of debate.
METHODS: we reviewed 52 patients submitted to selective stenting from 1991 to 2000 because of ARN, followed for a mean of 22.3 months before and 24.6 after the procedure, looking for complications, re-stenosis rates, blood pressure, renal function and survival.
RESULTS: Arterial patency was achieved in 97.1% of procedures (71.6% by stent deployment); complications occurred in 42% of patients, and re-stenoses in 17.3% of vessels, most often in those without a stent (31.6% vs 8.3%). No effect was detectable on hypertension and renal failure in the whole group, but in the subgroup without technical failure or early dialysis start PTRA reduced the creatinine clearance (BCRC) decline from 0.9 to 0.19 mL/min/month. At univariate analysis, BCRC outcome was better in bilateral or single kidney stenoses, proteinuria < 1 g/day, serum creatinine < 4 mg/dL and resistance index < 0.8. Survival was 68.9% at five years, with a mortality rate of 4.5/100 person-years.
CONCLUSIONS: Renal outcome of successful PTRA differs from case to case, but efficacy is substantial. Primary stenting in ostial stenosis and selection of patients based on prognostic factors seem likely to improve the effectiveness
Activation of metabotropic glutamate receptors increase the frequency of spontaneous GABAergic currents through protein kinase A in neonatal rat hippocampal neurons
No full text1. The tight-seal whole cell recording technique was used to study the effects of the metabotropic glutamate receptor (mGluR) agonist, trans-1- aminocyclopentane-1,3-dicarboxylic acid (t-ACPD) on spontaneous χ- aminobutyric acid (GABA)-mediated synaptic currents in neonatal rat CA1 hippocampal neurons in slices obtained from postnatal (P) days P6-P12. 2. Bath application of t-ACPD (3-30 μM), in the presence of kynurenic acid, induced a concentration-dependent increase in frequency but not in amplitude of spontaneous GABAergic currents. The mean frequency ratio (t-ACPD 10 μM over control) was 2.6 ± 1 (mean ± SD), whereas the incan amplitude ratio was 1.1 ± 0.3. 3. The effect of t-ACPD was partially antagonized by the mGluR antagonist (RS)-α-methyl-4-carboxyphenylglycine (MCPG, 1 mM), 4. t- ACPD (10-30 μM) did not modify the frequency of miniature GABAergic synaptic currents recorded in tetrodotoxin (the mean frequency ratio of t-ACPD over control was 0.7 ± 0.3). 5. Forskolin (30 μM), but not its analogue 1,9 dideoxyforskolin (30 μM), mimicked the effect of t-ACPD. Similar effects were obtained with 3-isobutyl-1-methylxanthine (IBMX, 200 μM). 6. The potentiating effect of t-ACPD on spontaneous GABAergic currents was prevented by Rp-cAMPS (30 μM), a specific antagonist of protein kinase A. This suggests that mGluRs localized at the soma-dendritic level of GABAergic interneurons and positively coupled to cyclic AMP may modulate GABA release during a critical period of postnatal development
A voltage-clamp analysis of NMDA-induced responses on dopaminergic neurons of the rat substantia nigra zona compacta and ventral tegmental area.
No full textA quantitative analysis of antidepressant and antipsychotic prescriptions following an earthquake in Italy
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