Biomedical subjects

B Bagolini

Publications and source records attributed to B Bagolini.

4 recordsLinked to original sources

PubMed1979

Pattern reversal visually evoked potentials in general anesthesia.

Various authors have tried to determine visual acuity both electrophysiologically (Sokol, 1976 and 1978; Marg et al., 1976; Maffei and Fiorentini, 1977) and with psychophysical methods (Teller et al., 1974; Banks and Salapatek, 1976; Atkinson et al., 1976) in awake children. Our experiments try to verify the possibility of assessing visual acuity in children under Ethrane anesthesia. We conclude that under Ethrane anesthesia VEPs produced by phase-alternating square-wave gratings do not allow a fine assessment of visual acuity. Gross indications of visual acuity can however be obtained.

Adolescent↗

PubMed1977

Relative photometric measurements of retinal circulation (dromofluorograms): a televison technique.

Television fluoroangiography is used in order to obtain fluorescein dilution curves (dromofluorograms [From the Greek word: epsilon rho omicron mu omicron, which means flowing. We coined this word because dilution curves do not afford a true measurement of the blood circulation, or simply of a dilution, but of the fluorescein transport in the circulation!] from single retinal vessels. An optical fiber conveys the light from a single retinal artery, vein, or any other retinal area on the video screen to a photomultiplier. After low-pass electronic filtration, the dilution curves are recorded on a strip-chart recorder. The measurements considered are all related to time: the time interval between initial instants of the arterial and venous curve; the time interval between maximum instants; the arterial and venous curve rising times. It is seen that (1) the method is sensitive enough to enable variations in the quantities in pathologic cases to be detected; (2) owing to the great variability from part to part of the vessels, it is important to specify where the retinal dromofluorogram has been recorded.

Collagen Diseases↗

PubMed1977

[Areas of anomalous binocular single vision in small angle concomitant esotropia: evaluation by means of a modification of the v. Graefe technique (author's transl)].

A red filter in front of the fixing eye according to the v. Graefe technique was used in order to detect binocular visual field in patients with anomalous retinal correspondence and small angle esotropia. A striated glass was also placed in front of the deviated eye, in order to check whether single perception was related to suppression or to binocular vision. It has been demonstrated that these patients prevalently enjoy an anomalous binocular vision supported by an anomalous retinal correspondence. The suppression scotoma described by the v. Graefe perimetric technique may therefore in certain cases be in reality areas of single anomalous binocular vision. It has also been seen anomalous retinal correspondence is more deeply rooted at the center than at the periphery of the binocular visual field.

Adolescent↗

PubMed1976

Sensorial anomalies in strabismus. (suppression, anomalous correspondence, amblyopia).

Some concepts regarding suppression, anomalous correspondence and amblyopia are revised according to the sensorial findings obtainable from esotropic patients directly in casual seeing (with the aid of the striated glasses test) and by grading a sensorial dissociating effect (with the aid of a bar of optical filters). The following points are emphasized: 1. Suppression appears to be minimal in small angle strabismus where diplopia seems mainly to be avoided by an anomalous correspondence mechanism. On the contrary, suppression is the prevalent mechanism in large angle strabismus. 2. The anomalous correspondence mechanism may lead to a weak type of anomalous binocular vision which is easily interrupted by light optical filters or by dissociating tests. 3. The subjective space of patients with anomalous binocular vision resembles that of normal binocular vision in some aspects. 4. The development of amblyopia is interpreted in the light of these new concepts on suppression and anomalous binocular vision. 5. Postoperatively, anomalous correspondence rapidly re-adapts to the smaller angle deviation and may normalize if the deviation is completely eliminated. This is evident only in casual seeing; for a certain time, dissociating tests reveal the preoperative correspondence status. This behaviour of correspondence in casual seeing has led to attempts at normalizing anomalous correspondence by prism therapy. Newly observed sensotio-motorial obstacles, however, have been found to frequently hamper treatment in casual seeing.

Amblyopia↗