The Experts below are selected from a list of 282 Experts worldwide ranked by ideXlab platform

Amadi O. Ihunwo - One of the best experts on this subject based on the ideXlab platform.

  • Putative Adult Neurogenesis in Old World Parrots: The Congo African Grey Parrot (Psittacus erithacus) and Timneh Grey Parrot (Psittacus timneh).
    Frontiers in neuroanatomy, 2018
    Co-Authors: Pedzisai Mazengenya, Adhil Bhagwandin, Paul R. Manger, Amadi O. Ihunwo
    Abstract:

    In the current study, we examined for the first time, the potential for adult neurogenesis throughout the brain of the Congo African Grey Parrot (Psittacus erithacus) and Timneh Grey Parrot (Psittacus timneh) using immunohistochemistry for the endogenous markers proliferating cell nuclear antigen (PCNA), which labels proliferating cells, and doublecortin (DCX), which stains immature and migrating neurons. A similar distribution of PCNA and DCX immunoreactivity was found throughout the brain of the Congo African Grey and Timneh Grey Parrots, but minor differences were also observed. In both species of Parrots, PCNA and DCX immunoreactivity was observed in the olfactory bulbs, subventricular zone of the lateral wall of the lateral ventricle, telencephalic subdivisions of the pallium and subpallium, diencephalon, mesencephalon and the rhombencephalon. The olfactory bulb and telencephalic subdivisions exhibited a higher density of both PCNA and DCX immunoreactive cells than any other brain region. DCX immunoreactive staining was stronger in the telencephalon than in the subtelencephalic structures. There was evidence of proliferative hot spots in the dorsal and ventral poles of the lateral ventricle in the Congo African Grey Parrots at rostral levels, whereas only the dorsal accumulation of proliferating cells was observed in the Timneh Grey Parrot. In most pallial regions the density of PCNA and DCX stained cells increased from rostral to caudal levels with the densest staining in the nidopallium caudolaterale (NCL). The widespread distribution of PCNA and DCX in the brains of both Parrot species suggest the importance of adult neurogenesis and neuronal plasticity during learning and adaptation to external environmental variations. Key words: Doublecortin, proliferating cell nuclear antigen, old world Parrots, Congo African Grey Parrot, Timneh Grey Parrot, adult neurogenesis, cell proliferation, cell migration

  • Putative Adult Neurogenesis in Old World Parrots: The Congo African Grey Parrot (Psittacus erithacus) and Timneh Grey Parrot (Psittacus timneh)
    Frontiers Media S.A., 2018
    Co-Authors: Pedzisai Mazengenya, Adhil Bhagwandin, Paul R. Manger, Amadi O. Ihunwo
    Abstract:

    In the current study, we examined for the first time, the potential for adult neurogenesis throughout the brain of the Congo African Grey Parrot (Psittacus erithacus) and Timneh Grey Parrot (Psittacus timneh) using immunohistochemistry for the endogenous markers proliferating cell nuclear antigen (PCNA), which labels proliferating cells, and doublecortin (DCX), which stains immature and migrating neurons. A similar distribution of PCNA and DCX immunoreactivity was found throughout the brain of the Congo African Grey and Timneh Grey Parrots, but minor differences were also observed. In both species of Parrots, PCNA and DCX immunoreactivity was observed in the olfactory bulbs, subventricular zone of the lateral wall of the lateral ventricle, telencephalic subdivisions of the pallium and subpallium, diencephalon, mesencephalon and the rhombencephalon. The olfactory bulb and telencephalic subdivisions exhibited a higher density of both PCNA and DCX immunoreactive cells than any other brain region. DCX immunoreactive staining was stronger in the telencephalon than in the subtelencephalic structures. There was evidence of proliferative hot spots in the dorsal and ventral poles of the lateral ventricle in the Congo African Grey Parrots at rostral levels, whereas only the dorsal accumulation of proliferating cells was observed in the Timneh Grey Parrot. In most pallial regions the density of PCNA and DCX stained cells increased from rostral to caudal levels with the densest staining in the nidopallium caudolaterale (NCL). The widespread distribution of PCNA and DCX in the brains of both Parrot species suggest the importance of adult neurogenesis and neuronal plasticity during learning and adaptation to external environmental variations

Stephan Woodborne - One of the best experts on this subject based on the ideXlab platform.

  • isotope δ13c δ15n δ2h diet tissue discrimination in African Grey Parrot psittacus erithacus implications for forensic studies
    Isotopes in Environmental and Health Studies, 2017
    Co-Authors: Craig T Symes, Felix V Skhosana, Mike Butler, Brett Gardner, Stephan Woodborne
    Abstract:

    ABSTRACTDiet–tissue isotopic relationships established under controlled conditions are informative for determining the dietary sources and geographic provenance of organisms. We analysed δ13C, δ15N, and non-exchangeable δ2H values of captive African Grey Parrot Psittacus erithacus feathers grown on a fixed mixed-diet and borehole water. Diet–feather Δ13C and Δ15N discrimination values were +3.8 ± 0.3 ‰ and +6.3 ± 0.7 ‰ respectively; significantly greater than expected. Non-exchangeable δ2H feather values (−62.4 ± 6.4 ‰) were more negative than water (−26.1 ± 2.5 ‰) offered during feather growth. There was no positive relationship between the δ13C and δ15N values of the samples along each feather with the associated samples of food offered, or the feather non-exchangeable hydrogen isotope values with δ2H values of water, emphasising the complex processes involved in carbohydrate, protein, and income water routing to feather growth. Understanding the isotopic relationship between diet and feathers may provi...

  • Isotope (δ13C, δ15N, δ2H) diet–tissue discrimination in African Grey Parrot Psittacus erithacus: implications for forensic studies
    2017
    Co-Authors: Craig Symes, Felix V Skhosana, Mike Butler, Brett Gardner, Stephan Woodborne
    Abstract:

    Diet–tissue isotopic relationships established under controlled conditions are informative for determining the dietary sources and geographic provenance of organisms. We analysed δ13C, δ15N, and non-exchangeable δ2H values of captive African Grey Parrot Psittacus erithacus feathers grown on a fixed mixed-diet and borehole water. Diet–feather Δ13C and Δ15N discrimination values were +3.8 ± 0.3 ‰ and +6.3 ± 0.7 ‰ respectively; significantly greater than expected. Non-exchangeable δ2H feather values (−62.4 ± 6.4 ‰) were more negative than water (−26.1 ± 2.5 ‰) offered during feather growth. There was no positive relationship between the δ13C and δ15N values of the samples along each feather with the associated samples of food offered, or the feather non-exchangeable hydrogen isotope values with δ2H values of water, emphasising the complex processes involved in carbohydrate, protein, and income water routing to feather growth. Understanding the isotopic relationship between diet and feathers may provide greater clarity in the use of stable isotopes in feathers as a tool in determining origins of captive and wild-caught African Grey Parrots, a species that is widespread in aviculture and faces significant threats to wild populations. We suggest that these isotopic results, determined even in controlled laboratory conditions, be used with caution.

Pedzisai Mazengenya - One of the best experts on this subject based on the ideXlab platform.

  • Putative Adult Neurogenesis in Old World Parrots: The Congo African Grey Parrot (Psittacus erithacus) and Timneh Grey Parrot (Psittacus timneh).
    Frontiers in neuroanatomy, 2018
    Co-Authors: Pedzisai Mazengenya, Adhil Bhagwandin, Paul R. Manger, Amadi O. Ihunwo
    Abstract:

    In the current study, we examined for the first time, the potential for adult neurogenesis throughout the brain of the Congo African Grey Parrot (Psittacus erithacus) and Timneh Grey Parrot (Psittacus timneh) using immunohistochemistry for the endogenous markers proliferating cell nuclear antigen (PCNA), which labels proliferating cells, and doublecortin (DCX), which stains immature and migrating neurons. A similar distribution of PCNA and DCX immunoreactivity was found throughout the brain of the Congo African Grey and Timneh Grey Parrots, but minor differences were also observed. In both species of Parrots, PCNA and DCX immunoreactivity was observed in the olfactory bulbs, subventricular zone of the lateral wall of the lateral ventricle, telencephalic subdivisions of the pallium and subpallium, diencephalon, mesencephalon and the rhombencephalon. The olfactory bulb and telencephalic subdivisions exhibited a higher density of both PCNA and DCX immunoreactive cells than any other brain region. DCX immunoreactive staining was stronger in the telencephalon than in the subtelencephalic structures. There was evidence of proliferative hot spots in the dorsal and ventral poles of the lateral ventricle in the Congo African Grey Parrots at rostral levels, whereas only the dorsal accumulation of proliferating cells was observed in the Timneh Grey Parrot. In most pallial regions the density of PCNA and DCX stained cells increased from rostral to caudal levels with the densest staining in the nidopallium caudolaterale (NCL). The widespread distribution of PCNA and DCX in the brains of both Parrot species suggest the importance of adult neurogenesis and neuronal plasticity during learning and adaptation to external environmental variations. Key words: Doublecortin, proliferating cell nuclear antigen, old world Parrots, Congo African Grey Parrot, Timneh Grey Parrot, adult neurogenesis, cell proliferation, cell migration

  • Putative Adult Neurogenesis in Old World Parrots: The Congo African Grey Parrot (Psittacus erithacus) and Timneh Grey Parrot (Psittacus timneh)
    Frontiers Media S.A., 2018
    Co-Authors: Pedzisai Mazengenya, Adhil Bhagwandin, Paul R. Manger, Amadi O. Ihunwo
    Abstract:

    In the current study, we examined for the first time, the potential for adult neurogenesis throughout the brain of the Congo African Grey Parrot (Psittacus erithacus) and Timneh Grey Parrot (Psittacus timneh) using immunohistochemistry for the endogenous markers proliferating cell nuclear antigen (PCNA), which labels proliferating cells, and doublecortin (DCX), which stains immature and migrating neurons. A similar distribution of PCNA and DCX immunoreactivity was found throughout the brain of the Congo African Grey and Timneh Grey Parrots, but minor differences were also observed. In both species of Parrots, PCNA and DCX immunoreactivity was observed in the olfactory bulbs, subventricular zone of the lateral wall of the lateral ventricle, telencephalic subdivisions of the pallium and subpallium, diencephalon, mesencephalon and the rhombencephalon. The olfactory bulb and telencephalic subdivisions exhibited a higher density of both PCNA and DCX immunoreactive cells than any other brain region. DCX immunoreactive staining was stronger in the telencephalon than in the subtelencephalic structures. There was evidence of proliferative hot spots in the dorsal and ventral poles of the lateral ventricle in the Congo African Grey Parrots at rostral levels, whereas only the dorsal accumulation of proliferating cells was observed in the Timneh Grey Parrot. In most pallial regions the density of PCNA and DCX stained cells increased from rostral to caudal levels with the densest staining in the nidopallium caudolaterale (NCL). The widespread distribution of PCNA and DCX in the brains of both Parrot species suggest the importance of adult neurogenesis and neuronal plasticity during learning and adaptation to external environmental variations

Paul R. Manger - One of the best experts on this subject based on the ideXlab platform.

  • Putative Adult Neurogenesis in Old World Parrots: The Congo African Grey Parrot (Psittacus erithacus) and Timneh Grey Parrot (Psittacus timneh).
    Frontiers in neuroanatomy, 2018
    Co-Authors: Pedzisai Mazengenya, Adhil Bhagwandin, Paul R. Manger, Amadi O. Ihunwo
    Abstract:

    In the current study, we examined for the first time, the potential for adult neurogenesis throughout the brain of the Congo African Grey Parrot (Psittacus erithacus) and Timneh Grey Parrot (Psittacus timneh) using immunohistochemistry for the endogenous markers proliferating cell nuclear antigen (PCNA), which labels proliferating cells, and doublecortin (DCX), which stains immature and migrating neurons. A similar distribution of PCNA and DCX immunoreactivity was found throughout the brain of the Congo African Grey and Timneh Grey Parrots, but minor differences were also observed. In both species of Parrots, PCNA and DCX immunoreactivity was observed in the olfactory bulbs, subventricular zone of the lateral wall of the lateral ventricle, telencephalic subdivisions of the pallium and subpallium, diencephalon, mesencephalon and the rhombencephalon. The olfactory bulb and telencephalic subdivisions exhibited a higher density of both PCNA and DCX immunoreactive cells than any other brain region. DCX immunoreactive staining was stronger in the telencephalon than in the subtelencephalic structures. There was evidence of proliferative hot spots in the dorsal and ventral poles of the lateral ventricle in the Congo African Grey Parrots at rostral levels, whereas only the dorsal accumulation of proliferating cells was observed in the Timneh Grey Parrot. In most pallial regions the density of PCNA and DCX stained cells increased from rostral to caudal levels with the densest staining in the nidopallium caudolaterale (NCL). The widespread distribution of PCNA and DCX in the brains of both Parrot species suggest the importance of adult neurogenesis and neuronal plasticity during learning and adaptation to external environmental variations. Key words: Doublecortin, proliferating cell nuclear antigen, old world Parrots, Congo African Grey Parrot, Timneh Grey Parrot, adult neurogenesis, cell proliferation, cell migration

  • Putative Adult Neurogenesis in Old World Parrots: The Congo African Grey Parrot (Psittacus erithacus) and Timneh Grey Parrot (Psittacus timneh)
    Frontiers Media S.A., 2018
    Co-Authors: Pedzisai Mazengenya, Adhil Bhagwandin, Paul R. Manger, Amadi O. Ihunwo
    Abstract:

    In the current study, we examined for the first time, the potential for adult neurogenesis throughout the brain of the Congo African Grey Parrot (Psittacus erithacus) and Timneh Grey Parrot (Psittacus timneh) using immunohistochemistry for the endogenous markers proliferating cell nuclear antigen (PCNA), which labels proliferating cells, and doublecortin (DCX), which stains immature and migrating neurons. A similar distribution of PCNA and DCX immunoreactivity was found throughout the brain of the Congo African Grey and Timneh Grey Parrots, but minor differences were also observed. In both species of Parrots, PCNA and DCX immunoreactivity was observed in the olfactory bulbs, subventricular zone of the lateral wall of the lateral ventricle, telencephalic subdivisions of the pallium and subpallium, diencephalon, mesencephalon and the rhombencephalon. The olfactory bulb and telencephalic subdivisions exhibited a higher density of both PCNA and DCX immunoreactive cells than any other brain region. DCX immunoreactive staining was stronger in the telencephalon than in the subtelencephalic structures. There was evidence of proliferative hot spots in the dorsal and ventral poles of the lateral ventricle in the Congo African Grey Parrots at rostral levels, whereas only the dorsal accumulation of proliferating cells was observed in the Timneh Grey Parrot. In most pallial regions the density of PCNA and DCX stained cells increased from rostral to caudal levels with the densest staining in the nidopallium caudolaterale (NCL). The widespread distribution of PCNA and DCX in the brains of both Parrot species suggest the importance of adult neurogenesis and neuronal plasticity during learning and adaptation to external environmental variations

Adhil Bhagwandin - One of the best experts on this subject based on the ideXlab platform.

  • Putative Adult Neurogenesis in Old World Parrots: The Congo African Grey Parrot (Psittacus erithacus) and Timneh Grey Parrot (Psittacus timneh).
    Frontiers in neuroanatomy, 2018
    Co-Authors: Pedzisai Mazengenya, Adhil Bhagwandin, Paul R. Manger, Amadi O. Ihunwo
    Abstract:

    In the current study, we examined for the first time, the potential for adult neurogenesis throughout the brain of the Congo African Grey Parrot (Psittacus erithacus) and Timneh Grey Parrot (Psittacus timneh) using immunohistochemistry for the endogenous markers proliferating cell nuclear antigen (PCNA), which labels proliferating cells, and doublecortin (DCX), which stains immature and migrating neurons. A similar distribution of PCNA and DCX immunoreactivity was found throughout the brain of the Congo African Grey and Timneh Grey Parrots, but minor differences were also observed. In both species of Parrots, PCNA and DCX immunoreactivity was observed in the olfactory bulbs, subventricular zone of the lateral wall of the lateral ventricle, telencephalic subdivisions of the pallium and subpallium, diencephalon, mesencephalon and the rhombencephalon. The olfactory bulb and telencephalic subdivisions exhibited a higher density of both PCNA and DCX immunoreactive cells than any other brain region. DCX immunoreactive staining was stronger in the telencephalon than in the subtelencephalic structures. There was evidence of proliferative hot spots in the dorsal and ventral poles of the lateral ventricle in the Congo African Grey Parrots at rostral levels, whereas only the dorsal accumulation of proliferating cells was observed in the Timneh Grey Parrot. In most pallial regions the density of PCNA and DCX stained cells increased from rostral to caudal levels with the densest staining in the nidopallium caudolaterale (NCL). The widespread distribution of PCNA and DCX in the brains of both Parrot species suggest the importance of adult neurogenesis and neuronal plasticity during learning and adaptation to external environmental variations. Key words: Doublecortin, proliferating cell nuclear antigen, old world Parrots, Congo African Grey Parrot, Timneh Grey Parrot, adult neurogenesis, cell proliferation, cell migration

  • Putative Adult Neurogenesis in Old World Parrots: The Congo African Grey Parrot (Psittacus erithacus) and Timneh Grey Parrot (Psittacus timneh)
    Frontiers Media S.A., 2018
    Co-Authors: Pedzisai Mazengenya, Adhil Bhagwandin, Paul R. Manger, Amadi O. Ihunwo
    Abstract:

    In the current study, we examined for the first time, the potential for adult neurogenesis throughout the brain of the Congo African Grey Parrot (Psittacus erithacus) and Timneh Grey Parrot (Psittacus timneh) using immunohistochemistry for the endogenous markers proliferating cell nuclear antigen (PCNA), which labels proliferating cells, and doublecortin (DCX), which stains immature and migrating neurons. A similar distribution of PCNA and DCX immunoreactivity was found throughout the brain of the Congo African Grey and Timneh Grey Parrots, but minor differences were also observed. In both species of Parrots, PCNA and DCX immunoreactivity was observed in the olfactory bulbs, subventricular zone of the lateral wall of the lateral ventricle, telencephalic subdivisions of the pallium and subpallium, diencephalon, mesencephalon and the rhombencephalon. The olfactory bulb and telencephalic subdivisions exhibited a higher density of both PCNA and DCX immunoreactive cells than any other brain region. DCX immunoreactive staining was stronger in the telencephalon than in the subtelencephalic structures. There was evidence of proliferative hot spots in the dorsal and ventral poles of the lateral ventricle in the Congo African Grey Parrots at rostral levels, whereas only the dorsal accumulation of proliferating cells was observed in the Timneh Grey Parrot. In most pallial regions the density of PCNA and DCX stained cells increased from rostral to caudal levels with the densest staining in the nidopallium caudolaterale (NCL). The widespread distribution of PCNA and DCX in the brains of both Parrot species suggest the importance of adult neurogenesis and neuronal plasticity during learning and adaptation to external environmental variations