Is uric acid implicated in benign paroxysmal positional vertigo?
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Adult↗
Biomedical subjects
Nausica V Ziavra
Publications and source records attributed to Nausica V Ziavra.
A new paradigm to investigate the roles of head and eye movements in the coordination of whole-body movements.
Although previous studies have demonstrated the existence of coordinated eye and head movements during gaze shifts, none has studied the temporal and spatial characteristics of the various body segments during gaze transfers that require whole body movements. Without this information it is not possible to determine the extent of the interaction between the oculomotor control system and the motor control systems responsible for moving other body parts. Presented here is a detailed analysis of the timing and kinematic characteristics of participants' ( N = 5) eye, head, upper body and feet during rotation of their body to align with light cues positioned at eccentric locations (45, 90, and 135 degrees, left and right of centre). For all rotation amplitudes there was a clear sequence of body segment orientation (eye, head, upper body and feet) consistent with previous studies of locomotor steering and significant correlations between the onset latency times of the eyes and all body segments. There were also significant correlations between temporally aligned kinematic profiles of the feet and the eye in space for all movement amplitudes. The extent of correlation was significantly lower for displacement profiles of the feet versus head and of the feet versus upper body. These findings demonstrate substantial eye-foot coordination during a novel whole-body rotation paradigm and provide evidence that the output of the motor systems responsible for moving the feet is heavily influenced by the motor systems responsible for generating and coordinating eye and head movements to peripheral targets.
Adult↗
Effect of breathing supplemental oxygen on motion sickness in healthy adults.
OBJECTIVE: To compare the effects of breathing supplemental oxygen vs air on alleviating motion sickness in healthy adults. SUBJECTS AND METHODS: Between April and July 2002, 20 healthy subjects were exposed to a provocative motion on 2 occasions (1-week interval) according to a randomized, counterbalanced, crossover design. During motion, subjects rated their nausea (1, no symptoms, to 4, moderate nausea) every 30 seconds. Once mild nausea occurred, subjects began breathing supplemental oxygen or air through a face mask. Motion ceased when moderate nausea occurred, but subjects continued breathing study gases for 5 minutes while recovering. Recovery was assessed for 20 minutes after motion. RESULTS: There were no significant differences in the rate of increase in symptom severity or the rate of recovery between the 2 conditions. CONCLUSION: Breathing supplemental oxygen had no advantage over breathing air in reducing motion sickness in healthy adults.
Adult↗
Overcoming difficulties in implementing a universal newborn hearing screening program.
The aim of this paper was to present our experience with a universal newborn hearing screening program, including the specific problems and difficulties faced since its beginning, along with the measures used to overcome them and to improve its efficiency. We analyzed data from 22,195 newborns screened by transiently evoked otoacoustic emissions (TEOAE) performed during the first days after birth. 84.8% of the newborns passed on the first test and another 12.15% passed on rescreening before hospital discharge. This produced a "not pass" rate (false-positive and true positive) of 3.05%. The rate of newborns who did not undergo screening and the rate of "lost to follow-up" newborns were reduced in time, due to various applied modifications to the protocol. It may be thus concluded that our protocol proved to be successful in attaining low refer rates for follow-up screening. A major problem that remains unresolved is the absence of effective follow-up.
Audiometry, Evoked Response↗