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Dopamine (DA) in the dorsal and ventral striatum is associated with different aspects of locomotor activity control. The ventral striatum may form an interface between the limbic system and the extrapyramidal motor system. The distribution of dopaminergic fibers in this interface position was studied in detail with a method applying antibodies against DA.(More)
Efferent connections of the dorsal tegmental region (DTR) of the rat were studied with anterograde tracing of the lectin Phaseolus vulgaris-leucoagglutinin (PHA-L). The results demonstrate that DTR fibers reach widespread mesencephalic, diencephalic and telencephalic structures which for the most part can be characterized as limbic, i.e. the(More)
Verifying the match to prescribed electro-acoustic performance is essential in a scientific approach to pediatric hearing instrument fittings. This study aimed to compare hearing instrument output values, at 65 and 90 dB sound-pressure level (SPL) input signals, of instruments fitted to pre-school children in South Africa to the targets prescribed by the(More)
OBJECTIVE To date, the main direction in frequency-lowering hearing aid studies has been in relation to speech perception abilities. With improvements in hearing aid technology, interest in musical perception as a dimension that could improve hearing aid users' quality of life has grown. The purpose of this study was to determine the influence of non-linear(More)
A combination of fluorescent retrograde tracing and immunohistochemical staining for substance P (SP) and Leu-enkephalin (Enk) was used to study the projections from the interpeduncular nucleus (IP) to the dorsal tegmental region, i.e. the dorsal tegmental nucleus of Gudden, the dorsolateral tegmental nucleus and the caudal extension of the dorsal raphe(More)
OBJECTIVE To determine speech-perception-in-noise (with speech and noise spatially distinct and coincident) and bilateral spatial benefits of head-shadow effect, summation, squelch and spatial release of masking in adults with delayed sequential cochlear implants. STUDY DESIGN A cross-sectional one group post-test-only exploratory design was employed.(More)
The purpose of this research was twofold: firstly, to develop a music perception test (MPT) for hearing-aid users, and secondly, to evaluate the influence of non-linear frequency compression (NFC) on music perception with the use of the self-compiled test. This article focuses on the description of the development and validation of the MPT. To date, the(More)
Pure-tone testing is the primary audiological test procedure for the differential diagnosis of hearing loss and hearing disorders in school-aged children. No research is currently available internationally for children's responses to continuous versus pulsed pure-tones. The aim of this exploratory investigation was to compare the performance of a group of(More)
The main function of a cochlear implant is to optimise the auditory and communicative abilities of individuals with hearing loss. The use of a hearing aid in the non-implanted ear further optimises binaural hearing, which leads to improved sound localization, speech discrimination in noise and quiet surroundings, and refined sound quality. The goal of the(More)
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