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H Haker

Publications and source records attributed to H Haker.

5 recordsLinked to original sources
PubMed2005

Internet forums: a self-help approach for individuals with schizophrenia?

OBJECTIVE: To study if and how online self-help forums for individuals with schizophrenia are used. METHOD: We analysed 1200 postings of 576 users in 12 international schizophrenia forums regarding communicative skills [fields of interest and self-help mechanisms (SHM)]. RESULTS: The forums were predominantly used by affected individuals, few relatives or friends. The fields of interest of the users concern daily problems of the illness like symptoms and emotional involvement with the illness. Self-help mechanisms mostly used are disclosure and providing information. Emotional interaction e.g. empathy or gratitude were comparatively rare. CONCLUSION: Individuals suffering from schizophrenia participate in online self-help forums using the same SHM, discussing similar topics as do individuals with other psychiatric disorders as well as not affected relatives and caregivers. Therefore, this tool seems to be a useful approach to cope with alienation and isolation, albeit only a small number of schizophrenia forums are found in the Internet.

Communication↗
PubMed2003

Three-dimensional vestibular eye and head reflexes of the chameleon: characteristics of gain and phase and effects of eye position on orientation of ocular rotation axes during stimulation in yaw direction.

We investigated gaze-stabilizing reflexes in the chameleon using the three-dimensional search-coil technique. Animals were rotated sinusoidally around an earth-vertical axis under head-fixed and head-free conditions, in the dark and in the light. Gain, phase and the influence of eye position on vestibulo-ocular reflex rotation axes were studied. During head-restrained stimulation in the dark, vestibulo-ocular reflex gaze gains were low (0.1-0.3) and phase lead decreased with increasing frequencies (from 100 degrees at 0.04 Hz to < 30 degrees at 1 Hz). Gaze gains were larger during stimulation in the light (0.1-0.8) with a smaller phase lead (< 30 degrees) and were close to unity during the head-free conditions (around 0.6 in the dark, around 0.8 in the light) with small phase leads. These results confirm earlier findings that chameleons have a low vestibulo-ocular reflex gain during head-fixed conditions and stimulation in the dark and higher gains during head-free stimulation in the light. Vestibulo-ocular reflex eye rotation axes were roughly aligned with the head's rotation axis and did not systematically tilt when the animals were looking eccentrically, up- or downward (as predicted by Listing's Law). Therefore, vestibulo-ocular reflex responses in the chameleon follow a strategy, which optimally stabilizes the entire retinal images, a result previously found in non-human primates.

Adaptation, Physiological↗