Sökning: "Unmyelinated"

Visar resultat 1 - 5 av 26 avhandlingar innehållade ordet Unmyelinated.

  1. 1. Physiological properties of unmyelinated low-threshold tactile (CT) afferents in the human hairy skin

    Författare :Katarina Wiklund Fernström; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Nyckelord :Human; microneurography; mechanoafferent; unmyelinated; sensory; touch; temperature; capsaicin;

    Sammanfattning : For more than a decade it has been known that human skin is supplied with a system of slowly conducting unmyelinated afferents that respond strongly to innocuous skin deformation (Nordin, 1990; Vallbo et al., 1993). LÄS MER

  2. 2. Machine learning for identification of brain activity patterns with applications in gentle touch processing

    Författare :Malin Björnsdotter Åberg; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Nyckelord :Somatosensory; Machine learning; Pattern recognition; fMRI; Support vector machines; Neuroscience; Brain; BOLD; Signal processing; Artificial intelligence; Touch; Human; Unmyelinated; Sensory; Affective;

    Sammanfattning : Since the first mention of artificial intelligence in the 1950s, the field of machine learning has provided increasingly appealing tools for recognition of otherwise unintelligible pattern representations in complex data structures. Human brain activity, acquired using functional magnetic resonance imaging (fMRI), is a prime example of such complex data where the utility of pattern recognition has been demonstrated in a wide range of studies recently (Haynes et al. LÄS MER

  3. 3. A pathway for pleasant touch: linking peripheral receptors to central processing and hedonic experience

    Författare :Line Sofie Löken; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Nyckelord :pleasant; touch; microneurography; human; CT afferent; unmyelinated;

    Sammanfattning : This thesis investigates the mechanisms underpinning pleasant touch, describes a pathway from peripheral nerve endings in the skin to the insular cortex, and relates these findings to the subjective hedonic experience of touch. In Paper I, the relationship between primary afferent encoding and perception of pleasantness was investigated by combining microneurography recordings from human mechanoreceptors with psychophysical measurements during soft brush stroking at 6 different velocities between 0. LÄS MER

  4. 4. Changes in sensory systems during aging : an experimental study in the rat

    Författare :Esbjörn Bergman; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; aging; behavior; primary sensory neuron; dorsal root ganglion; mystacial pad; sensory nerve ending; axon dystrophy; neuropeptides; B4; RT97; CTB; neurotrophins; trk; p75NTR; GFR[alpha]; RET; protein; mRNA;

    Sammanfattning : Aging is associated with sensorimotor disturbances, including increased proprioceptive thresholds. The present study aimed to clarify the occurrence of structural and biochemical alterations in sensory systems of behaviorally characterized aged rats. LÄS MER

  5. 5. The laryngeal mucosa and the superior laryngeal nerve of the rat : an immunohistochemical and electron microscopic study

    Författare :Siw Domeij; Umeå universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Superior laryngeal nerve; paraganglia; substance P; calcitonin gene-related peptide; neuropeptide Y; vasoactive intestinal polypeptide; enkephalin; mast cells; electron microscopy; immunohistochemistry;

    Sammanfattning : Neuropeptides are present in nerve fibers of the upper and lower airways. Local release of these substances may be of importance for the pathophysiology of airway disorders and may play a role in responses to different stimuli. However, little is known about the distribution of neuropeptides in the larynx. LÄS MER