Search for dissertations about: "gamma oscillations"

Showing result 1 - 5 of 14 swedish dissertations containing the words gamma oscillations.

  2. 1. α-Cell signalling in glucose-regulated glucagon secretion

    Author : Qian Yu; Anders Tengholm; Erik Gylfe; Sebastian Barg; David W Piston; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Islets; glucagon; insulin; somatostatin; ATP; cAMP; Ca2 ; GHB; oscillations; α-cell; β-cell; δ-cell; Medical Cell Biology; Medicinsk cellbiologi;

    Abstract : Glucagon is a blood glucose-elevating hormone released from α-cells in the islets of Langerhans during hypoglycaemia. Glucagon is critical for glucose homeostasis and inappropriate regulation of its secretion underlies both impaired counter-regulation of hypoglycaemia and chronic hyperglycaemia in diabetes patients. READ MORE

  4. 2. Models and biomarkers of motor and neuropsychiatric complications in Parkinson’s disease

    Author : Katrine Skovgård; Basala gangliernas patofysiologi; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Parkinson s disease Parkinsonism; Dyskinesia; Drug-Induced; Oscillations; Local field potentials; Impulsive-compulsive behaviours; Dopamine agonists; Animal Models; Pharmacology;

    Abstract : Parkinson's disease (PD) is a neurodegenerative disorder characterised by typicalmotor symptoms that are caused by severe dopamine depletion in the cortico-basalganglia network. Parkinsonian motor symptoms are improved by dopaminergicmedications, the most effective being the dopamine precursor L-DOPA. READ MORE

  5. 3. Modulation of hippocampal gamma oscillations by dopamine and serotonin receptor subtypes

    Author : April Johnston; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : Normal brain function is dependent on the efficient and effective communication between the multitudes of microcircuits that it encompasses. The brain employs neuronal-network oscillations for large-scale communication in the cortex. READ MORE

  6. 4. Oscillations and spike statistics in biophysical attractor networks

    Author : Mikael Lundqvist; Anders Lansner; Arvind Kumar; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Attractor networks; computational neuroscience; cortex; datalogi; Computer Science;

    Abstract : The work of this thesis concerns how cortical memories are stored and retrieved. In particular, large-scale simulations are used to investigate the extent to which associative attractor theory is compliant with known physiology and in vivo dynamics. READ MORE

  7. 5. Mechanisms of amyloid-beta cytotoxicity in hippocampal network function : rescue strategies in Alzheimer's disease

    Author : Firoz Roshan; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : The origin and nature of cognitive processes are strongly associated with synchronous rhythmic activity in the brain. Gamma oscillations that span the frequency range of 30–80 Hz are particularly important for sensory perception, attention, learning, and memory. READ MORE