Stimulation of the cholinergic neurotransmissions enhances the efficacy of vestibular rehabilitation.

The primary aim of this study was to investigate the efficacy of vestibular rehabilitation in a cohort of elderly labyrinthine-defective patients also affected by a moderate cognitive impairment of vascular origin. A secondary aim was to establish whether additional treatment with a cholinergic precursor (choline alphascerate) might enhance the results of the physical therapy in these patients. A retrospective clinical design was employed and data were collected from the vestibular rehabilitation treatment charts of 42 selected elderly patients who attended the tertiary referral centre of the Audiology and Vestibology of the University Hospital of Modena, Italy, in the period 1998-2008. Two groups of patients, well-matched for sex, age, and as close as possible for the vestibular examination upon admittance, were selected; Group A included 20 patients who had undergone vestibular rehabilitation training for one month and Group B included 22 patients who had attended the same physical therapy sessions as the former and had also received daily medication with 1200 mg of choline alphascerate per os. The outcome measures of the two forms of treatments were obtained from comparisons between posturographic and electronystagmographic examinations at baseline and 3 weeks after the end of treatment. Instrumental findings were completed by recording scores of the Dynamic Gait Index, the Dizziness Handicap Inventory and the Hospital Anxiety and Depression Scale before and after treatment. A statistically significant improvement in postural control (p < 0.05) and gait and balance performances (p < 0.005) was recorded in both groups; a relevant and statistically significant reduction of the asymmetry of the vestibular-ocular reflexes was also observed (p < 0.005). The self-rated dizziness handicap and psychological distress were significantly reduced (p < 0.005). Comparisons between the two groups revealed that patients who had also received medication, had achieved significantly better results than the other patients with respect to postural control in response to optokinetic stimulations (p < 0.05) and to Dynamic Gait Index (p < 0.05), thus suggesting, a reinforcement of cholinergic stimulation on vestibular compensation when tested in clinical conditions that require complex perceptual-motor skills and make a significant demand upon cognitive spatial processing resources. Further applications of stimulation of the cholinergic neurotransmission are discussed with particular regard to vestibular compensation in patients with no cognitive impairment or recurrent vertigo attacks of labyrinthine origin.

Psychological profile and social behaviour of working adults with mild or moderate hearing loss.

In this study, an assessment was made of the global assumption that working adults with a mild to moderate sensorineural hearing loss experience more negative emotional reactions and socio-situational limitations than subjects with no hearing problems and that a deterioration of health-related quality of life on these specific domains would occur. Comparisons between 73 hearing-impaired subjects and 96 controls, well-matched for socio-demographic variables, were performed using the HHIA, MOS 36-Item Short Form Health Survey (SF-36) and SFQ questionnaires scores and revealed that the former experience a higher level of perceived hearing handicap and a deterioration of health-related quality of life while investigating emotional and socio-situational domains than the latter (p < 0.005). While investigating the psychological distress dimension of the hearing-impaired subjects by means of the Symptom Check List (SCL-90-R), it emerged that they are more prone to depression, anxiety, interpersonal sensitivity, and hostility than subjects with no hearing problems (p < 0.05). It is argued that the sensory impairment, with its associated disability, may discourage hearing-impaired individuals from exposing themselves to socially challenging situations, producing isolation that leads to depression, irritability, feelings of inferiority. The same psychological symptoms, on the other hand, can compound and worsen the picture by influencing social behaviour of the affected persons. Further prospective studies are needed to address this issue. Nevertheless, it is concluded that Audiology Services, despite the time and costs involved, should improve their diagnostic ability by exploring more areas of hearing-impaired subjects concerns in order not to overlook their potentially reduced psychosocial well-being.

Validity of the Italian adaptation of the Tinnitus Handicap Inventory; focus on quality of life and psychological distress in tinnitus-sufferers.

The aim of this study was to determine the validity of the Italian translation of the Tinnitus Handicap Inventory (THI) by Newman et al. in order to make this self-report measure of perceived tinnitus handicap available both for clinical and research purposes in our country and to contribute to its cross-cultural validation as a self-report measure of perceived severity of tinnitus. The Italian translation of the Tinnitus Handicap Inventory (THI) was administered to 100 outpatients suffering from chronic tinnitus, aged between 20 and 82 years, who attended the audiological tertiary centres of the University Hospital of Modena and the Regional Hospital of Treviso. No segregation of cases was made on audiometric results; patients suffering from vertigo and neurological diseases were excluded. Pyschoacoustic characteristics of tinnitus (loudness and pitch) were determined and all patients also completed the MOS 36-Item Short Form Health Survey to assess self-perceived quality of life and the Hospital Anxiety and Depression Scale as a measure of self-perceived levels of anxiety and depression. The THI-I showed a robust internal consistency reliability (Cronbach's alpha = 0.91) that was only slightly lower than the original version (Tinnitus Handicap Inventory-US; Cronbach's alpha = 0.93) and its Danish (Cronbach's alpha = 0.93) and Portuguese (Cronbach's alpha = 0.94) translations. Also its two subscales (Functional and Emotional) showed a good internal consistency reliability (Cronbach's alpha = 0.85 and 0.86, respectively). On the other hand, the Catastrophic subscale showed an unacceptable internal consistency reliability as it is too short in length (5 items). A confirmatory factor analysis failed to demonstrate that the 3 subscales of the THI-I correspond to 3 different factors. Close correlations were found between the total score of the Italian translation of the Tinnitus Handicap Inventory and all the subscales of the MOS 36-Item Short Form Health Survey (SF-36) and the Hospital Anxiety and Depression Scale scores indicating a good construct validity. Moreover, these statistically significant correlations (p < 0.005) confirmed that the self-report tinnitus handicap is largely related to psychological distress and a deterioration in the quality of life. On the other hand, it was confirmed that the tinnitus perceived handicap is totally independent (p > 0.05) from its audiometrically-derived measures of loudness and pitch thus supporting previous studies that focused on the importance of non-auditory factors, namely somatic attention, psychological distress and coping strategies, in the generation of tinnitus annoyance. Finally the results of the present study suggest that the THI-I maintains its original validity and should be incorporated, together with other adequate psychometric questionnaires, in the audiological examination of patients suffering from tinnitus and that psychiatric counselling should be recommended for the suspected co-morbidity between tinnitus annoyance and psychological distress.