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L W Swanson - One of the best experts on this subject based on the ideXlab platform.

  • the amygdala and its place in the Cerebral Hemisphere
    Annals of the New York Academy of Sciences, 2006
    Co-Authors: L W Swanson
    Abstract:

    Developmental, gene expression, connectional, and neuron morphology evidence converges to suggest that cell groups of the amygdalar region participate in at least four distinct, though interrelated, functional systems associated with differentiated corticostriatopallidal projections. The amygdala is neither a structural nor a functional unit; instead, it is a collection of adjacent cell groups in the medial temporal lobe and adjacent regions of the caudal piriform lobe that was defined on gross anatomic terms.

  • projections from bed nuclei of the stria terminalis magnocellular nucleus implications for Cerebral Hemisphere regulation of micturition defecation and penile erection
    The Journal of Comparative Neurology, 2006
    Co-Authors: Hongwei Dong, L W Swanson
    Abstract:

    The basic structural organization of axonal projections from the small but distinct magnocellular and ventral nuclei (of the bed nuclei of the stria terminalis) was analyzed with the Phaseolus vulgaris leucoagglutinin anterograde tract tracing method in adult male rats. The former's overall projection pattern is complex, with over 80 distinct terminal fields ipsilateral to injection sites. Innervated regions in the Cerebral Hemisphere and brainstem fall into nine general functional categories: Cerebral nuclei, behavior control column, orofacial motor-related, humorosensory/thirst-related, brainstem autonomic control network, neuroendocrine, hypothalamic visceromotor pattern-generator network, thalamocortical feedback loops, and behavioral state control. The most novel findings indicate that the magnocellular nucleus projects to virtually all known major parts of the brain network that controls pelvic functions, including micturition, defecation, and penile erection, as well as to brain networks controlling nutrient and body water homeostasis. This and other evidence suggests that the magnocellular nucleus is part of a corticostriatopallidal differentiation modulating and coordinating pelvic functions with the maintenance of nutrient and body water homeostasis. Projections of the ventral nucleus are a subset of those generated by the magnocellular nucleus, with the obvious difference that the ventral nucleus does not project detectably to Barrington's nucleus, the subfornical organ, the median preoptic and parastrial nuclei, the neuroendocrine system, and midbrain orofacial motor-related regions.

  • projections from bed nuclei of the stria terminalis magnocellular nucleus implications for Cerebral Hemisphere regulation of micturition defecation and penile erection
    The Journal of Comparative Neurology, 2006
    Co-Authors: Hongwei Dong, L W Swanson
    Abstract:

    The basic structural organization of axonal projections from the small but distinct magnocellular and ventral nuclei (of the bed nuclei of the stria terminalis) were analyzed with the PHAL anterograde tract tracing method in adult male rats. The former's overall projection pattern is complex, with over 80 distinct terminal fields ipsilateral to injection sites. Innervated regions in the Cerebral Hemisphere and brainstem fall into 9 general functional categories: Cerebral nuclei, behavior control column, orofacial motor-related, humorosensory/thirst-related, brainstem autonomic control network, neuroendocrine, hypothalamic visceromotor pattern generator network, thalamocortical feedback loops, and behavioral state control. The most novel findings indicate that the magnocellular nucleus projects to virtually all known major parts of the brain network that controls pelvic functions including micturition, defecation, and penile erection—as well as to brain networks controlling nutrient and body water homeostasis. This and other evidence suggests that the magnocellular nucleus is part of a cortico-striatopallidal differentiation modulating and coordinating pelvic functions with the maintenance of nutrient and body water homeostasis. Projections of the ventral nucleus are a subset of those generated by the magnocellular nucleus, with the obvious difference that the ventral nucleus does not project detectably to Barrington's nucleus, the subfornical organ, the median preoptic and parastrial nuclei, the neuroendocrine system, and midbrain orofacial motor-related regions.

  • Cerebral Hemisphere regulation of motivated behavior
    Brain Research, 2000
    Co-Authors: L W Swanson
    Abstract:

    Abstract The goals of this article are to suggest a basic wiring diagram for the motor neural network that controls motivated behavior, and to provide a model for the organization of Cerebral Hemisphere inputs to this network. Cerebral projections mediate voluntary regulation of a behavior control column in the ventromedial upper brainstem that includes (from rostral to caudal) the medial preoptic, anterior hypothalamic, descending paraventricular, ventromedial, and premammillary nuclei, the mammillary body, and finally the substantia nigra and ventral tegmental area. The rostral segment of this column is involved in controlling ingestive (eating and drinking) and social (defensive and reproductive) behaviors, whereas the caudal segment is involved in controlling general exploratory or foraging behaviors (with locomotor and orienting components) that are required for obtaining any particular goal object. Virtually all parts of the Cerebral Hemispheres contribute to a triple descending projection — with cortical excitatory, striatal inhibitory, and pallidal disinhibitory components — to specific parts of the behavior control column. The functional dynamics of this circuitry remain to be established.

Hongwei Dong - One of the best experts on this subject based on the ideXlab platform.

  • projections from bed nuclei of the stria terminalis magnocellular nucleus implications for Cerebral Hemisphere regulation of micturition defecation and penile erection
    The Journal of Comparative Neurology, 2006
    Co-Authors: Hongwei Dong, L W Swanson
    Abstract:

    The basic structural organization of axonal projections from the small but distinct magnocellular and ventral nuclei (of the bed nuclei of the stria terminalis) were analyzed with the PHAL anterograde tract tracing method in adult male rats. The former's overall projection pattern is complex, with over 80 distinct terminal fields ipsilateral to injection sites. Innervated regions in the Cerebral Hemisphere and brainstem fall into 9 general functional categories: Cerebral nuclei, behavior control column, orofacial motor-related, humorosensory/thirst-related, brainstem autonomic control network, neuroendocrine, hypothalamic visceromotor pattern generator network, thalamocortical feedback loops, and behavioral state control. The most novel findings indicate that the magnocellular nucleus projects to virtually all known major parts of the brain network that controls pelvic functions including micturition, defecation, and penile erection—as well as to brain networks controlling nutrient and body water homeostasis. This and other evidence suggests that the magnocellular nucleus is part of a cortico-striatopallidal differentiation modulating and coordinating pelvic functions with the maintenance of nutrient and body water homeostasis. Projections of the ventral nucleus are a subset of those generated by the magnocellular nucleus, with the obvious difference that the ventral nucleus does not project detectably to Barrington's nucleus, the subfornical organ, the median preoptic and parastrial nuclei, the neuroendocrine system, and midbrain orofacial motor-related regions.

  • projections from bed nuclei of the stria terminalis magnocellular nucleus implications for Cerebral Hemisphere regulation of micturition defecation and penile erection
    The Journal of Comparative Neurology, 2006
    Co-Authors: Hongwei Dong, L W Swanson
    Abstract:

    The basic structural organization of axonal projections from the small but distinct magnocellular and ventral nuclei (of the bed nuclei of the stria terminalis) was analyzed with the Phaseolus vulgaris leucoagglutinin anterograde tract tracing method in adult male rats. The former's overall projection pattern is complex, with over 80 distinct terminal fields ipsilateral to injection sites. Innervated regions in the Cerebral Hemisphere and brainstem fall into nine general functional categories: Cerebral nuclei, behavior control column, orofacial motor-related, humorosensory/thirst-related, brainstem autonomic control network, neuroendocrine, hypothalamic visceromotor pattern-generator network, thalamocortical feedback loops, and behavioral state control. The most novel findings indicate that the magnocellular nucleus projects to virtually all known major parts of the brain network that controls pelvic functions, including micturition, defecation, and penile erection, as well as to brain networks controlling nutrient and body water homeostasis. This and other evidence suggests that the magnocellular nucleus is part of a corticostriatopallidal differentiation modulating and coordinating pelvic functions with the maintenance of nutrient and body water homeostasis. Projections of the ventral nucleus are a subset of those generated by the magnocellular nucleus, with the obvious difference that the ventral nucleus does not project detectably to Barrington's nucleus, the subfornical organ, the median preoptic and parastrial nuclei, the neuroendocrine system, and midbrain orofacial motor-related regions.

Richard A Bronen - One of the best experts on this subject based on the ideXlab platform.

  • limbic lobe embryology and anatomy dissection and mr of the medial surface of the fetal Cerebral Hemisphere
    American Journal of Neuroradiology, 1995
    Co-Authors: E L Kier, Robert K. Fulbright, Richard A Bronen
    Abstract:

    PURPOSE: To facilitate understanding of limbic lobe anatomy by showing embryologic transformations of the medial surface of the Cerebral Hemisphere. METHODS: Brains from fetal specimens ranging from 13 to 24 weeks of gestational age were dissected. Photographs were made of the medial surface of the Cerebral Hemisphere. MR images of different fetal specimens of similar age were made for comparison of MR anatomy with dissected material. RESULTS: At 13 weeks, the entire inner limbic arch of the hippocampal formation is visible on the medial surface of the Cerebral Hemisphere. The hippocampal sulcus extends from frontal lobe to temporal lobe. At 16 weeks, the outer neocortical limbic arch of the subcallosal area, cingulate gyrus, and parahippocampus gyrus is present. Growth of the corpus callosum is associated with reduction in size of the hippocampal formation in the frontal lobe. The sulcus of the corpus callosum is the remnant of the anterior part of the hippocampal sulcus. At 18 weeks, growth of the parahippocampal gyrus begins to conceal the hippocampal formation. The supracallosal gyrus (indusium griseum), hidden from view by the corpus callosum, and the paraterminal gyrus are remnants of the previously larger hippocampal formation. CONCLUSIONS: Analysis of fetal specimens in different developmental stages with dissection and MR provides insight into embryologic transformations responsible for the complex anatomy of the limbic lobe.

  • limbic lobe embryology and anatomy dissection and mr of the medial surface of the fetal Cerebral Hemisphere
    American Journal of Neuroradiology, 1995
    Co-Authors: E L Kier, Robert K. Fulbright, Richard A Bronen
    Abstract:

    PURPOSE: To facilitate understanding of limbic lobe anatomy by showing embryologic transformations of the medial surface of the Cerebral Hemisphere. METHODS: Brains from fetal specimens ranging from 13 to 24 weeks of gestational age were dissected. Photographs were made of the medial surface of the Cerebral Hemisphere. MR images of different fetal specimens of similar age were made for comparison of MR anatomy with dissected material. RESULTS: At 13 weeks, the entire inner limbic arch of the hippocampal formation is visible on the medial surface of the Cerebral Hemisphere. The hippocampal sulcus extends from frontal lobe to temporal lobe. At 16 weeks, the outer neocortical limbic arch of the subcallosal area, cingulate gyrus, and parahippocampus gyrus is present. Growth of the corpus callosum is associated with reduction in size of the hippocampal formation in the frontal lobe. The sulcus of the corpus callosum is the remnant of the anterior part of the hippocampal sulcus. At 18 weeks, growth of the parahippocampal gyrus begins to conceal the hippocampal formation. The supracallosal gyrus (indusium griseum), hidden from view by the corpus callosum, and the paraterminal gyrus are remnants of the previously larger hippocampal formation. CONCLUSIONS: Analysis of fetal specimens in different developmental stages with dissection and MR provides insight into embryologic transformations responsible for the complex anatomy of the limbic lobe.

Kuniaki Ogasawara - One of the best experts on this subject based on the ideXlab platform.

  • 123 i iomazenil single photon emission computed tomography imaging in a patient with mild traumatic subdural hematoma accompanied by delayed transient aphasia
    No shinkei geka. Neurological surgery, 2018
    Co-Authors: Jun Yoshida, Nobukazu Komoribayashi, Kohki Oikawa, Shinichi Ohmama, Daigo Kojima, Yasuyoshi Shimada, Kuniaki Ogasawara
    Abstract:

    : Early and late images of 123I-iomazenil(IMZ)single-photon emission computed tomography(SPECT)reflect distributions of Cerebral blood flow and those of cortical benzodiazepine receptor binding potential, respectively. Crossed cerebellar diaschisis reflects left-to-right asymmetry of metabolism in the Cerebral Hemispheres. We present a case of a 67-year-old woman who developed transient aphasia 3 days after the onset of a mild acute subdural hematoma. Computed tomography scan and magnetic resonance imaging during aphasia did not show enlargement of the hematoma or any new lesions. Electroencephalography did not show any abnormalities. Early images of 123I-IMZ SPECT 3 days after the onset of aphasia revealed a decrease in radioactivity in the right cerebellar Hemisphere relative to that in the left cerebellar Hemisphere. Late images of the same 123I-IMZ SPECT displayed a decrease in radioactivity in the left Cerebral Hemisphere relative to that in the right Cerebral Hemisphere. Twenty-four days later, the aphasia disappeared and the left-to-right asymmetries of radioactivity in the cerebellar and Cerebral Hemispheres on the early and late 123I-IMZ SPECT images also resolved.

  • chronological changes in brain blood flow and central benzodiazepine receptor binding potential in a patient with symptomatic epilepsy after surgery for aneurysmal subarachnoid hemorrhage 123i iomazenil single photon emission computed tomography stud
    Case Reports in Neurology, 2017
    Co-Authors: Toshiyuki Murakami, Hidehiko Endo, Hiroshi Kashimura, Hiroki Kuroda, Kuniaki Ogasawara
    Abstract:

    Early 123I-iomazenil single-photon emission computed tomography (SPECT) images are correlated with blood flow in the brain, and late images are correlated with cortical benzodiazepine receptor binding potential. Reduced metabolism in the contralateral Cerebral Hemisphere is indicated by crossed cerebellar hypoperfusion (CCH). We present the case of a 63-year-old man who developed symptomatic epilepsy 13 days after surgery for an aneurysmal subarachnoid hemorrhage. Early images on 123I-iomazenil SPECT 2 days after seizure onset revealed CCH and hyperperfusion in the affected Cerebral Hemisphere where benzodiazepine receptor binding potential was reduced in late images on 123I-iomazenil SPECT. These abnormal findings resolved on repeated 123I-iomazenil SPECT 1 month after seizure onset. The case we present here is consistent with the idea that the central benzodiazepine receptor system in the human brain undergoes changes that are related to seizures due to epilepsy.

  • detection of misery perfusion in the Cerebral Hemisphere with chronic unilateral major Cerebral artery steno occlusive disease using crossed cerebellar hypoperfusion comparison of brain spect and pet imaging
    European Journal of Nuclear Medicine and Molecular Imaging, 2013
    Co-Authors: Yoshiyasu Matsumoto, Kuniaki Ogasawara, Hideo Saito, Kazunori Terasaki, Yoshihiro Takahashi, Yasushi Ogasawara, Masakazu Kobayashi, Kenji Yoshida, Takaaki Beppu, Yoshitaka Kubo
    Abstract:

    Purpose In patients with unilateral internal carotid or middle Cerebral artery (ICA or MCA) occlusive disease, the degree of crossed cerebellar hypoperfusion that is evident within a few months after the onset of stroke may reflect Cerebral metabolic rate of oxygen in the affected Cerebral Hemisphere relative to that in the contralateral Cerebral Hemisphere. The aim of the present study was to determine whether the ratio of blood flow asymmetry in the cerebellar Hemisphere to blood flow asymmetry in the Cerebral Hemisphere on positron emission tomography (PET) and single photon emission computed tomography (SPECT) correlates with oxygen extraction fraction (OEF) asymmetry in the Cerebral Hemisphere on PET in patients with chronic unilateral ICA or MCA occlusive disease and whether this blood flow ratio on SPECT detects misery perfusion in the affected Cerebral Hemisphere in such patients.

E L Kier - One of the best experts on this subject based on the ideXlab platform.

  • limbic lobe embryology and anatomy dissection and mr of the medial surface of the fetal Cerebral Hemisphere
    American Journal of Neuroradiology, 1995
    Co-Authors: E L Kier, Robert K. Fulbright, Richard A Bronen
    Abstract:

    PURPOSE: To facilitate understanding of limbic lobe anatomy by showing embryologic transformations of the medial surface of the Cerebral Hemisphere. METHODS: Brains from fetal specimens ranging from 13 to 24 weeks of gestational age were dissected. Photographs were made of the medial surface of the Cerebral Hemisphere. MR images of different fetal specimens of similar age were made for comparison of MR anatomy with dissected material. RESULTS: At 13 weeks, the entire inner limbic arch of the hippocampal formation is visible on the medial surface of the Cerebral Hemisphere. The hippocampal sulcus extends from frontal lobe to temporal lobe. At 16 weeks, the outer neocortical limbic arch of the subcallosal area, cingulate gyrus, and parahippocampus gyrus is present. Growth of the corpus callosum is associated with reduction in size of the hippocampal formation in the frontal lobe. The sulcus of the corpus callosum is the remnant of the anterior part of the hippocampal sulcus. At 18 weeks, growth of the parahippocampal gyrus begins to conceal the hippocampal formation. The supracallosal gyrus (indusium griseum), hidden from view by the corpus callosum, and the paraterminal gyrus are remnants of the previously larger hippocampal formation. CONCLUSIONS: Analysis of fetal specimens in different developmental stages with dissection and MR provides insight into embryologic transformations responsible for the complex anatomy of the limbic lobe.

  • limbic lobe embryology and anatomy dissection and mr of the medial surface of the fetal Cerebral Hemisphere
    American Journal of Neuroradiology, 1995
    Co-Authors: E L Kier, Robert K. Fulbright, Richard A Bronen
    Abstract:

    PURPOSE: To facilitate understanding of limbic lobe anatomy by showing embryologic transformations of the medial surface of the Cerebral Hemisphere. METHODS: Brains from fetal specimens ranging from 13 to 24 weeks of gestational age were dissected. Photographs were made of the medial surface of the Cerebral Hemisphere. MR images of different fetal specimens of similar age were made for comparison of MR anatomy with dissected material. RESULTS: At 13 weeks, the entire inner limbic arch of the hippocampal formation is visible on the medial surface of the Cerebral Hemisphere. The hippocampal sulcus extends from frontal lobe to temporal lobe. At 16 weeks, the outer neocortical limbic arch of the subcallosal area, cingulate gyrus, and parahippocampus gyrus is present. Growth of the corpus callosum is associated with reduction in size of the hippocampal formation in the frontal lobe. The sulcus of the corpus callosum is the remnant of the anterior part of the hippocampal sulcus. At 18 weeks, growth of the parahippocampal gyrus begins to conceal the hippocampal formation. The supracallosal gyrus (indusium griseum), hidden from view by the corpus callosum, and the paraterminal gyrus are remnants of the previously larger hippocampal formation. CONCLUSIONS: Analysis of fetal specimens in different developmental stages with dissection and MR provides insight into embryologic transformations responsible for the complex anatomy of the limbic lobe.