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D Chialant

Publications and source records attributed to D Chialant.

6 recordsLinked to original sources
PubMed2001

Demonstration of retroiridal extension of an epithelial membrane by ultrasound biomicroscopy: a clinicopathologic correlation.

PURPOSE: To report the utilization of ultrasound biomicroscopy (UBM) in identifying the extension into the posterior segment of an epithelial membrane, as correlated by the histopathologic findings. METHOD: Case report. UBM findings before enucleation with histopathologic correlation. RESULTS: UBM demonstrated a membrane tracking from the posterior iris surface over the ciliary body and towards the retina. Light microscopic examination disclosed the epithelial nature of this membrane. CONCLUSION: UBM can identify extension of an epithelial membrane into the posterior segment and thereby guide the approach to surgical management.

Aged↗
PubMed2000

Separable processing of consonants and vowels.

There are two views about the nature of consonants and vowels. One view holds that they are categorically distinct objects that play a fundamental role in the construction of syllables in speech production. The other view is that they are convenient labels for distinguishing between peak (vowel) and non-peak (consonant) parts of a continuous stream of sound that varies in sonority (roughly the degree of openness of the vocal apparatus during speech), or that they are summary labels for bundles of feature segments. Taking the latter view, consonants and vowels do not have an independent status in language processing. Here we provide evidence for the possible categorical distinction between consonants and vowels in the brain. We report the performance of two Italian-speaking aphasics who show contrasting, selective difficulties in producing vowels and consonants. Their performance in producing individual consonants is independent of the sonority value and feature properties of the consonants. This pattern of results suggests that consonants and vowels are processed by distinct neural mechanisms, thereby providing evidence for their independent status in language production.

Adult↗
PubMed1997

Identity and similarity factors in repetition blindness: implications for lexical processing.

The influence of identity and similarity of repeated items on repetition blindness (RB) was investigated in two rapid-serial-visual processing (RSVP) tasks. In Experiment 1, the difference between correct recall for sentences containing repeated identical items and their controls was contrasted with the difference between correct recall for sentences containing pairs of orthographically similar items (fish-dish) and their controls. In Experiment 2 the same comparison was made between sentences containing repeated identical items and sentences containing pairs of orthographically identical items (the watch-to watch). The amount of RB elicited by the two conditions was measured at three different temporal lags. The results show that the function that describes performance over time for the repeated-identical (R-I) condition is different from that for the condition in which the items are orthographically similar (repeated-neighbor: R-N) or orthographically identical (repeated-homonym: R-H). The results are interpreted as suggesting that the decrements in performance observed for recall of the second occurrence of the repeated item in the R-I and the R-N and R-H conditions have different underlying causes.

Analysis of Variance↗
PubMedDate not supplied

Technical and nursing roles in patient care for photorefractive surgery.

1. The University of Ottawa Eye Institute is conducting clinical research protocols using the excimer laser. The state-of-the-art technology currently available ensures an ever-evolving role for the staff, and working as a team allows the patient the best possible care experience. 2. The role of the technologist (at Ottawa Eye Institute) includes ensuring the basic laser maintenance and calibration of the energy levels delivered by the laser; carrying out pre- and postoperative patient testing according to protocols; and assisting with the surgical procedure. 3. The role of the nurse (at Ottawa Eye Institute) includes ensuring the informed consent form has been signed and patient education been given.

Humans↗