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    Colored computed tomography scan of section through brain of senior male patient with dementia. — Stock Photo
    Colored computed tomography scan of section through brain of senior male patient with dementia.
    Colored computed tomography scan of section through brain of senior male patient with dementia. — Stock Photo
    Colored computed tomography scan of section through brain of senior male patient with dementia.
    Illustration of brain with degenerated substantia nigra in Parkinsons disease. — Stock Photo
    Illustration of brain with degenerated substantia nigra in Parkinsons disease.
    Overhead view of young woman crouching over toilet bowl. — Stock Photo
    Overhead view of young woman crouching over toilet bowl.
    Woman holding hands to forehead — Stock Photo
    Woman holding hands to forehead
    Illustration of healthy and degenerated substantia nigra of human brains. — Stock Photo
    Illustration of healthy and degenerated substantia nigra of human brains.
    Colored computed tomography scan of section through brain of senior male patient with dementia. — Stock Photo
    Colored computed tomography scan of section through brain of senior male patient with dementia.
    Colored computed tomography scan of section through brain of senior male patient with dementia. — Stock Photo
    Colored computed tomography scan of section through brain of senior male patient with dementia.
    Artwork of healthy substantia nigra and close-up of dopaminergic neurons of human brain. — Stock Photo
    Artwork of healthy substantia nigra and close-up of dopaminergic neurons of human brain.
    Artwork of healthy substantia nigra and close-up of dopaminergic neurons of human brain. — Stock Photo
    Artwork of healthy substantia nigra and close-up of dopaminergic neurons of human brain.
    Colored computed tomography scan of section through brain of senior male patient with dementia. — Stock Photo
    Colored computed tomography scan of section through brain of senior male patient with dementia.
    Illustration of degenerated substantia nigra and dopaminergic neurons in Parkinsons disease. — Stock Photo
    Illustration of degenerated substantia nigra and dopaminergic neurons in Parkinsons disease.
    Illustration of healthy and degenerated substantia nigra of human brains with dopaminergic neurons. — Stock Photo
    Illustration of healthy and degenerated substantia nigra of human brains with dopaminergic neurons.
    Colored computed tomography scan of section through brain of senior male patient with dementia. — Stock Photo
    Colored computed tomography scan of section through brain of senior male patient with dementia.
    Substantia nigra. Illustration showing a healthy substantia nigra in a human brain. The substantia nigra plays an important role in reward, addiction, and movement. Degeneration of this structure is characteristic of Parkinson's disease. — Stock Photo
    Substantia nigra. Illustration showing a healthy substantia nigra in a human brain. The substantia nigra plays an important role in reward, addiction, and movement. Degeneration of this structure is characteristic of Parkinson's disease.
    Illustration of degenerated substantia nigra and dopaminergic neurons in Parkinsons disease. — Stock Photo
    Illustration of degenerated substantia nigra and dopaminergic neurons in Parkinsons disease.
    Colored computed tomography scan of section through brain of senior male patient with dementia. — Stock Photo
    Colored computed tomography scan of section through brain of senior male patient with dementia.
    Digital artwork of substantia nigra from human brain. — Stock Photo
    Digital artwork of substantia nigra from human brain.
    Colored computed tomography scan of section through brain of senior male patient with dementia. — Stock Photo
    Colored computed tomography scan of section through brain of senior male patient with dementia.
    Substantia nigra. Illustration showing a healthy substantia nigra in a human brain. The substantia nigra plays an important role in reward, addiction, and movement. Degeneration of this structure is characteristic of Parkinson's disease. — Stock Photo
    Substantia nigra. Illustration showing a healthy substantia nigra in a human brain. The substantia nigra plays an important role in reward, addiction, and movement. Degeneration of this structure is characteristic of Parkinson's disease.
    Artwork of healthy substantia nigra and close-up of dopaminergic neurons of human brain. — Stock Photo
    Artwork of healthy substantia nigra and close-up of dopaminergic neurons of human brain.
    Artwork of healthy substantia nigra and close-up of dopaminergic neurons of human brain. — Stock Photo
    Artwork of healthy substantia nigra and close-up of dopaminergic neurons of human brain.
    Illustration of healthy and degenerated substantia nigra of human brains with dopaminergic neurons. — Stock Photo
    Illustration of healthy and degenerated substantia nigra of human brains with dopaminergic neurons.