Sökning: "Monosynaptic reflex"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden Monosynaptic reflex.

1. 1. Spinal Cord Processing of Sensory Information: Spatial Organization and Adaptive Mechanisms

   Författare :Anders Levinsson; Malmö Diagnostisk radiologi; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Neurologi; neurophysiology; neuropsychology; Neurology; transplantatioin; pain; sensorimotor; plasticity; reflex; neuropsykologi; neurofysiologi;

   Sammanfattning : Principles for sensorimotor transformation and plasticity in the spinal cord and functional repair in the root-avulsed spinal cord were studied. A comparative study confirmed that the nociceptive withdrawal reflex (NWR) system is composed of reflex modules, with each performing a finely tuned transformation of skin sensory input to activity in one muscle. LÄS MER

3. 2. Experimental studies of spinal mechanisms associated with muscle fatigue

   Författare :Ivana Kalezic; Vito Enrico Pettorossi; Umeå universitet; []
   Nyckelord :muscle fatigue; monosynaptic reflex; presynaptic inhibition; recurrent inhibition; fusimotor system; Fos-immunoreactivity; referral pain; kirurgi; Surgery;

   Sammanfattning : Muscle fatigue is ubiquitous in every day life.Muscle fatigue might be considered as an altered state of motor behaviour, which impairs motor performance. By contrast, muscle fatigue could also be considered a positive phenomenon, which protects muscle tissue from damage that might be incurred to it by overuse. LÄS MER

4. 3. Monoaminergic modulation in spinal reflex pathways from group I afferents

   Författare :Ingela Hammar; Göteborgs universitet; []
   Nyckelord :primary afferents; spinal interneurones; ventral spinocerebellar tract neurones; noradrenaline; serotonin; cat;

   Sammanfattning : Serotonin and noradrenaline are known to play an important part in modulation of spinal neuronal networks. Group I muscle afferents mediate information on dynamic changes of muscle length and tension, and modulation of actions from these afferents could be of importance for the execution of movements. LÄS MER

5. 4. On amino acid neurotransmitters in the spinal cord motor nuclei

   Författare :Göran Örnung; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :neurotransmitter; aspartate; glutamate; GABA. glycine; homocysteate; taurine; ultrastructure; freeze-substitution; immunocytochemistry; bouton; synaptic input; motoneuron; strech reflex; spinal cord; cat. rat;

   Sammanfattning : Using pre- and post-embedding immunocytochemistry, the distribution of six amino acid neurotransmitter candidates, with special reference to y-amino-butyric acid (GABA), glycine and glutamate was examined in boutons apposing somata and dendrites in the lumbar motor nuclei of the cat spinal cord. The monosynaptic connection between muscle spindle I a afferents and motoneurons regarding content of neuroactive amino acid and complement of amino acid receptors in the postsynaptic membrane was studied in the rat. LÄS MER

7. 5. Hypothalamic and cortical control of jaw reflexes

   Författare :Kurt Å. Olsson; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cat; Oral projections; Cerebral cortex; Cytoarchitecture; Hypothalamus; Defence-Attack area; Jaw reflexes; Bruxism; Myofascial pain dysfunction;

   Sammanfattning : The subject of the thesis is a study of the projections from low threshold oral and face afferents to the cerebral cortex and of descending motor control mechanisms originating in the cerebral cortex or the hypothalamus and influencing the jaw reflexes.Cats anaesthetized with chi oral ose were used for the experiments. LÄS MER