Search for dissertations about: "optic tectum"

Showing result 1 - 5 of 7 swedish dissertations containing the words optic tectum.

  2. 1. The optic tectum of the salmon:site of interaction of neurohormonal photoperiodic and neural visual signals. The GABAergic neuronal system and melatonin receptors

    Author : Marie Anzelius; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Animal anatomy; melatonin receptors; GABA; optic tectum; fish; brain; animal morphology; Djurs anatomi och morfologi;

    Abstract : Melatonin is a neurohormone which mediates photoperiodic signals from the pineal organ to the brain. GABA (g-aminobutyric acid) is the major inhibitory transmitter in the central nervous system. READ MORE

  4. 2. Neurotrophic factors and their receptors in the developing avian retina and its tectal target

    Author : Miriam Karlsson; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Neurosciences; Neurovetenskap; Neurology; Neurologi; Developmental Neurosciences; medicinsk utvecklings- och neurobiologi;

    Abstract : Neurotrophic factors and their receptors are crucial for the formation of neuronal connections and for the neuronal survival during embryonic development of the nervous system. This has particularly been shown by studies of the PNS. READ MORE

  5. 3. Evolution of the subcortical circuits controlling goal-directed behaviour

    Author : Marcus Stephenson-Jones; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : The aim of the work presented in this thesis was to reconstruct the minimal neural hardware that vertebrates use for goal-directed behaviour. By studying lamprey, one of the phylogenetically oldest vertebrates, we were able to identify the neural circuitry that has been conserved since jawed and jawless vertebrates diverged over 560 million years ago. READ MORE

  6. 4. Brain Aromatase in the guppy, Poecilia reticulata : Distribution, control and role in behaviour

    Author : Stefan Hallgren; Håkan Olsén; Bertil Borg; Julie Bakker; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Oestrogen production; behaviour; anatomy; endocrinology; bio markers; endocrine disruption; Organism biology; Organismbiologi; funktionell morfologi; Functional Zoomorphology; Biology;

    Abstract : Oestrogens are produced by aromatisation of androgens by the aromatase enzyme. In the vertebrate brain this synthesis has vital functions in nerve protection, cell proliferation and nerve development during injury respectively brain development. READ MORE

  7. 5. Neuromolecular and behavioural profile of teleosts : - effects of boldness, agonistic behaviour and reproductive status

    Author : Arshi Mustafa; Svante Winberg; Per Erik Olsson; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Histamine receptor 1 hrh1 ; histamine receptor 2 hrh2 ; histamine receptor 3 hrh3 ; boldness; personality; aggression; Histaminergic activity; Serotonergic activty 5-HIAA 5-HT ; Dopaminergic activty DOPAC DA ; spiegeldanio spd ; wild caught zebrafish; AB zebrafish; behaviour; brain.;

    Abstract : This thesis investigates if boldness is reflected in the function of brain histaminergic system in zebrafish (Danio rerio). Moreover, behavioural differences in AB line, spiegeldanio (spd) line and wild caught strain of zebrafish have also been explored apart from the winner-loser effect in AB and spd fish. READ MORE