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Visar resultat 1 - 5 av 9 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. The functional role of the lateral olivocochlear system and mechanisms underlying sound condtioning

    Författare :Xianzhi Niu; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Cochlea; dopamine; tyrosine hydroxylase; sound conditioning; apoptosis; acoustic trauma; lateral olivocochlear nucleus; D1 receptor; efferents;

    Sammanfattning : Sound conditioning is a process induced by a low-level, non-damaging acoustic stimulus that provides protection against subsequent detrimental forms of acoustic trauma. Many hypotheses have been advanced to explain the effect of sound conditioning, but the mechanisms underlying this phenomenon are still not yet known. LÄS MER

  3. 2. Structural and functional studies on nerve regeneration in the rat

    Författare :Bo Povlsen; Linköpings universitet; []
    Nyckelord :MEDICINE; MEDICIN;

    Sammanfattning : Peripheral nerves cannot be repaired, but they may be helped to regenerate. The results of surgical treatment of nerve injuries remain disappointing, however. This is a biological rather than a technical challenge. LÄS MER

  4. 3. Sensory neurons : stem cells and development

    Författare :Jens Hjerling-Leffler; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Sensory neuron; stem cells; development; boundary cap; GABA; TRPV 1; TRPA 1; TRPM8; calcium imaging; Foxs 1; SSEA-1; Schwann cells;

    Sammanfattning : The sensory nervous system is the only means we have of communicating with the surrounding world. The neurons responsible for the sensation of pain, touch, the ability to know the position of our limbs and part of maintenance of body posture are located in the dorsal root ganglia (DRG). LÄS MER

  5. 4. The γ-aminobutyric acid and proton signaling systems in the zebrafish brain : Characterization and effect of stress

    Författare :Arianna Cocco; Svante Winberg; William H. J. Norton; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; g-aminobutyric acid GABA ; GABAA receptors; adult zebrafish; central nervous system; gene expression profiling; extracellular acidification.; Biokemi; Biochemistry;

    Sammanfattning : The central nervous system of vertebrates is continuously processing sensory information relayed from the periphery, integrating it and producing outputs transmitted to efferents. In the brain, neurons employ an array of messenger molecules to filter afferent information and finely regulate synaptic transmission. LÄS MER

  7. 5. Autonomic cardiac control in patients with epilepsy : spectral analysis of heart rate variability

    Författare :Håkan Persson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :SUDEP; autonomic nervous system; heart rate variability; epilepsy; carbamazepine; epilepsy surgery;

    Sammanfattning : The heart is affected by the central nervous system via sympathetic and para-sympathetic efferents from autonomic centres in the brain stem. By assessing the beat to beat variation of the RR-intervals of the heart, i.e. the heart rate variability (HRV) it is possible to separately analyse sympathetic and parasympathetic effects on the heart. LÄS MER