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  • 1
    Online Resource
    Online Resource
    Anatomy and white matter connections of the fusiform gyrus
    Springer Science and Business Media LLC ; 2020
    In:  Scientific Reports Vol. 10, No. 1 ( 2020-08-10)
    Details
    In: Scientific Reports, Springer Science and Business Media LLC, Vol. 10, No. 1 ( 2020-08-10)
    Abstract: The fusiform gyrus is understood to be involved in the processing of high-order visual information, particularly related to faces, bodies, and stimuli characterized by high spatial frequencies. A detailed understanding of the exact location and nature of associated white-tracts could significantly improve post-operative morbidity related to declining capacity. Through generalized q-sampling imaging (GQI) validated by gross dissection as a direct anatomical method of identifying white matter tracts, we have characterized these connections based on relationships to other well-known structures. We created the white matter tracts using GQI and confirmed the tracts using gross dissection. These dissections demonstrated connections to the occipital lobe from the fusiform gyrus along with longer association fibers that course through this gyrus. The fusiform gyrus is an important region implicated in such tasks as the visual processing of human faces and bodies, as well as the perception of stimuli with high spatial frequencies. Post-surgical outcomes related to this region may be better understood in the context of the fiber-bundle anatomy highlighted by this study.
    Type of Medium: Online Resource
    ISSN: 2045-2322
    URL: Article
    DOI: 10.1038/s41598-020-70410-6
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2020
    detail.hit.zdb_id: 2615211-3
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  • 2
    Online Resource
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    Anatomy and white matter connections of the inferior frontal gyrus
    Wiley ; 2019
    In:  Clinical Anatomy Vol. 32, No. 4 ( 2019-05), p. 546-556
    Details
    In: Clinical Anatomy, Wiley, Vol. 32, No. 4 ( 2019-05), p. 546-556
    Abstract: The inferior frontal gyrus (IFG) is involved in the evaluation of linguistic, interoceptive, and emotional information. A detailed understanding of its subcortical white matter anatomy could improve postoperative morbidity related to surgery in and around this gyrus. Through GQI‐based fiber tracking validated by gross anatomical dissection as ground truth, we characterized the fiber tracts of the IFG based on relationships to other well‐known neuroanatomic structures. Diffusion imaging from the Human Connectome Project for 10 healthy adult controls was used for fiber tracking analysis. We evaluated the IFG as a whole based on its connectivity with other regions. All tracts were mapped in both hemispheres, and a lateralization index was calculated based on resultant tract volumes. Ten cadaveric dissections were then performed using a modified Klingler technique to demonstrate the location of major tracts. We identified four major connections of the IFG: a white matter bundle corresponding the frontal aslant tract connecting to the superior frontal gyrus; the superior longitudinal fasciculus connecting to the inferior parietal lobule, lateral occipital area, posterior temporal areas, and the temporal pole; the inferior fronto‐occipital fasciculus connecting to the cuneus and lingual gyrus; and the uncinate fasciculus connecting to the temporal pole. A callosal fiber bundle connecting the inferior frontal gyri bilaterally was also identified. The IFG is an important region implicated in a variety of tasks including language processing, speech production, motor control, interoceptive awareness, and semantic processing. Postsurgical outcomes related to this region may be better understood in the context of the fiber‐bundle anatomy highlighted in this study. Clin. Anat. 32:546–556, 2019. © 2019 Wiley Periodicals, Inc.
    Type of Medium: Online Resource
    ISSN: 0897-3806 , 1098-2353
    URL: Issue
    URL: Article
    DOI: 10.1002/ca.v32.4
    DOI: 10.1002/ca.23349
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 2004511-6
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  • 3
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    Online Resource
    A method for safely resecting anterior butterfly gliomas: the surgical anatomy of the default mode network and the relevance of its preservation
    Journal of Neurosurgery Publishing Group (JNSPG) ; 2016
    In:  Journal of Neurosurgery Vol. 126, No. 6 ( 2016-09), p. 1795-1811
    Details
    In: Journal of Neurosurgery, Journal of Neurosurgery Publishing Group (JNSPG), Vol. 126, No. 6 ( 2016-09), p. 1795-1811
    Abstract: Gliomas invading the anterior corpus callosum are commonly deemed unresectable due to an unacceptable risk/benefit ratio, including the risk of abulia. In this study, the authors investigated the anatomy of the cingulum and its connectivity within the default mode network (DMN). A technique is described involving awake subcortical mapping with higher attention tasks to preserve the cingulum and reduce the incidence of postoperative abulia for patients with so-called butterfly gliomas. METHODS The authors reviewed clinical data on all patients undergoing glioma surgery performed by the senior author during a 4-year period at the University of Oklahoma Health Sciences Center. Forty patients were identified who underwent surgery for butterfly gliomas. Each patient was designated as having undergone surgery either with or without the use of awake subcortical mapping and preservation of the cingulum. Data recorded on these patients included the incidence of abulia/akinetic mutism. In the context of the study findings, the authors conducted a detailed anatomical study of the cingulum and its role within the DMN using postmortem fiber tract dissections of 10 cerebral hemispheres and in vivo diffusion tractography of 10 healthy subjects. RESULTS Forty patients with butterfly gliomas were treated, 25 (62%) with standard surgical methods and 15 (38%) with awake subcortical mapping and preservation of the cingulum. One patient (1/15, 7%) experienced postoperative abulia following surgery with the cingulum-sparing technique. Greater than 90% resection was achieved in 13/15 (87%) of these patients. CONCLUSIONS This study presents evidence that anterior butterfly gliomas can be safely removed using a novel, attention-task based, awake brain surgery technique that focuses on preserving the anatomical connectivity of the cingulum and relevant aspects of the cingulate gyrus.
    Type of Medium: Online Resource
    ISSN: 0022-3085 , 1933-0693
    URL: Article
    DOI: 10.3171/2016.5.JNS153006
    RVK:
    XA 10000
    RVK:
    XA 55270
    Language: Unknown
    Publisher: Journal of Neurosurgery Publishing Group (JNSPG)
    Publication Date: 2016
    detail.hit.zdb_id: 2026156-1
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  • 4
    Online Resource
    Online Resource
    Anatomy and white matter connections of the orbitofrontal gyrus
    Journal of Neurosurgery Publishing Group (JNSPG) ; 2018
    In:  Journal of Neurosurgery Vol. 128, No. 6 ( 2018-06), p. 1865-1872
    Details
    In: Journal of Neurosurgery, Journal of Neurosurgery Publishing Group (JNSPG), Vol. 128, No. 6 ( 2018-06), p. 1865-1872
    Abstract: The orbitofrontal cortex (OFC) is understood to have a role in outcome evaluation and risk assessment and is commonly involved with infiltrative tumors. A detailed understanding of the exact location and nature of associated white matter tracts could significantly improve postoperative morbidity related to declining capacity. Through diffusion tensor imaging–based fiber tracking validated by gross anatomical dissection as ground truth, the authors have characterized these connections based on relationships to other well-known structures. METHODS Diffusion imaging from the Human Connectome Project for 10 healthy adult controls was used for tractography analysis. The OFC was evaluated as a whole based on connectivity with other regions. All OFC tracts were mapped in both hemispheres, and a lateralization index was calculated with resultant tract volumes. Ten postmortem dissections were then performed using a modified Klingler technique to demonstrate the location of major tracts. RESULTS The authors identified 3 major connections of the OFC: a bundle to the thalamus and anterior cingulate gyrus, passing inferior to the caudate and medial to the vertical fibers of the thalamic projections; a bundle to the brainstem, traveling lateral to the caudate and medial to the internal capsule; and radiations to the parietal and occipital lobes traveling with the inferior fronto-occipital fasciculus. CONCLUSIONS The OFC is an important center for processing visual, spatial, and emotional information. Subtle differences in executive functioning following surgery for frontal lobe tumors may be better understood in the context of the fiber-bundle anatomy highlighted by this study.
    Type of Medium: Online Resource
    ISSN: 0022-3085 , 1933-0693
    URL: Article
    DOI: 10.3171/2017.3.JNS162070
    RVK:
    XA 10000
    RVK:
    XA 55270
    Language: Unknown
    Publisher: Journal of Neurosurgery Publishing Group (JNSPG)
    Publication Date: 2018
    detail.hit.zdb_id: 2026156-1
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  • 5
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    Online Resource
    Anatomy and white matter connections of the lateral occipital cortex
    Springer Science and Business Media LLC ; 2020
    In:  Surgical and Radiologic Anatomy Vol. 42, No. 3 ( 2020-03), p. 315-328
    Details
    In: Surgical and Radiologic Anatomy, Springer Science and Business Media LLC, Vol. 42, No. 3 ( 2020-03), p. 315-328
    Type of Medium: Online Resource
    ISSN: 0930-1038 , 1279-8517
    URL: Article
    DOI: 10.1007/s00276-019-02371-z
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2020
    detail.hit.zdb_id: 1461974-X
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  • 6
    Online Resource
    Online Resource
    Risk of failure in pediatric ventriculoperitoneal shunts placed after abdominal surgery
    Journal of Neurosurgery Publishing Group (JNSPG) ; 2017
    In:  Journal of Neurosurgery: Pediatrics Vol. 19, No. 5 ( 2017-05), p. 571-577
    Details
    In: Journal of Neurosurgery: Pediatrics, Journal of Neurosurgery Publishing Group (JNSPG), Vol. 19, No. 5 ( 2017-05), p. 571-577
    Abstract: Experience has led us to suspect an association between shunt malfunction and recent abdominal surgery, yet information about this potential relationship has not been explored in the literature. The authors compared shunt survival in patients who underwent abdominal surgery to shunt survival in our general pediatric shunt population to determine whether such a relationship exists. METHODS The authors performed a retrospective review of all cases in which pediatric patients underwent ventriculoperitoneal shunt operations at their institution during a 7-year period. Survival time in shunt operations that followed abdominal surgery was compared with survival time of shunt operations in patients with no history of abdominal surgery. Univariate and multivariate analyses were used to identify factors associated with failure. RESULTS A total of 141 patients who underwent 468 shunt operations during the period of study were included; 107 of these 141 patients had no history of abdominal surgery and 34 had undergone a shunt operation after abdominal surgery. Shunt surgery performed more than 2 weeks after abdominal surgery was not associated with time to shunt failure (p = 0.86). Shunt surgery performed within 2 weeks after abdominal surgery was associated with time to failure (adjusted HR 3.6, 95% CI 1.3–9.6). CONCLUSIONS Undergoing shunt surgery shortly after abdominal surgery appears to be associated with shorter shunt survival. When possible, some patients may benefit from shunt placement utilizing alternative termini.
    Type of Medium: Online Resource
    ISSN: 1933-0707 , 1933-0715
    URL: Article
    DOI: 10.3171/2016.10.PEDS16377
    RVK:
    XA 55270.2
    Language: Unknown
    Publisher: Journal of Neurosurgery Publishing Group (JNSPG)
    Publication Date: 2017
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  • 7
    Online Resource
    Online Resource
    White matter connections of the inferior parietal lobule: A study of surgical anatomy
    Wiley ; 2017
    In:  Brain and Behavior Vol. 7, No. 4 ( 2017-04)
    Details
    In: Brain and Behavior, Wiley, Vol. 7, No. 4 ( 2017-04)
    Abstract: Interest in the function of the inferior parietal lobule (IPL) has resulted in increased understanding of its involvement in visuospatial and cognitive functioning, and its role in semantic networks. A basic understanding of the nuanced white‐matter anatomy in this region may be useful in improving outcomes when operating in this region of the brain. We sought to derive the surgical relationship between the IPL and underlying major white‐matter bundles by characterizing macroscopic connectivity. Methods Data of 10 healthy adult controls from the Human Connectome Project were used for tractography analysis. All IPL connections were mapped in both hemispheres, and distances were recorded between cortical landmarks and major tracts. Ten postmortem dissections were then performed using a modified Klingler technique to serve as ground truth. Results We identified three major types of connections of the IPL. (1) Short association fibers connect the supramarginal and angular gyri, and connect both of these gyri to the superior parietal lobule. (2) Fiber bundles from the IPL connect to the frontal lobe by joining the superior longitudinal fasciculus near the termination of the Sylvian fissure. (3) Fiber bundles from the IPL connect to the temporal lobe by joining the middle longitudinal fasciculus just inferior to the margin of the superior temporal sulcus. Conclusions We present a summary of the relevant anatomy of the IPL as part of a larger effort to understand the anatomic connections of related networks. This study highlights the principle white‐matter pathways and highlights key underlying connections.
    Type of Medium: Online Resource
    ISSN: 2162-3279 , 2162-3279
    URL: Issue
    URL: Article
    DOI: 10.1002/brb3.2017.7.issue-4
    DOI: 10.1002/brb3.640
    Language: English
    Publisher: Wiley
    Publication Date: 2017
    detail.hit.zdb_id: 2623587-0
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  • 8
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    Parcellation‐based tractographic modeling of the salience network through meta‐analysis
    Wiley ; 2022
    In:  Brain and Behavior Vol. 12, No. 7 ( 2022-07)
    Details
    In: Brain and Behavior, Wiley, Vol. 12, No. 7 ( 2022-07)
    Abstract: The salience network (SN) is a transitory mediator between active and passive states of mind. Multiple cortical areas, including the opercular, insular, and cingulate cortices have been linked in this processing, though knowledge of network connectivity has been devoid of structural specificity. Objective The current study sought to create an anatomically specific connectivity model of the neural substrates involved in the salience network. Methods A literature search of PubMed and BrainMap Sleuth was conducted for resting‐state and task‐based fMRI studies relevant to the salience network according to PRISMA guidelines. Publicly available meta‐analytic software was utilized to extract relevant fMRI data for the creation of an activation likelihood estimation (ALE) map and relevant parcellations from the human connectome project overlapping with the ALE data were identified for inclusion in our SN model. DSI‐based fiber tractography was then performed on publicaly available data from healthy subjects to determine the structural connections between cortical parcellations comprising the network. Results Nine cortical regions were found to comprise the salience network: areas AVI (anterior ventral insula), MI (middle insula), FOP4 (frontal operculum 4), FOP5 (frontal operculum 5), a24pr (anterior 24 prime), a32pr (anterior 32 prime), p32pr (posterior 32 prime), and SCEF (supplementary and cingulate eye field), and 46. The frontal aslant tract was found to connect the opercular‐insular cluster to the middle cingulate clusters of the network, while mostly short U‐fibers connected adjacent nodes of the network. Conclusion Here we provide an anatomically specific connectivity model of the neural substrates involved in the salience network. These results may serve as an empiric basis for clinical translation in this region and for future study which seeks to expand our understanding of how specific neural substrates are involved in salience processing and guide subsequent human behavior.
    Type of Medium: Online Resource
    ISSN: 2162-3279 , 2162-3279
    URL: Issue
    URL: Article
    DOI: 10.1002/brb3.v12.7
    DOI: 10.1002/brb3.2646
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2623587-0
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  • 9
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    Anatomy and White Matter Connections of the Superior Frontal Gyrus
    Wiley ; 2020
    In:  Clinical Anatomy Vol. 33, No. 6 ( 2020-09), p. 823-832
    Details
    In: Clinical Anatomy, Wiley, Vol. 33, No. 6 ( 2020-09), p. 823-832
    Abstract: The superior frontal gyrus (SFG) is an important region implicated in a variety of tasks including motor movement, working memory, resting‐state, and cognitive control. A detailed understanding of the subcortical white matter of the SFG could improve postoperative morbidity related to surgery around this gyrus. Through DSI‐based fiber tractography validated by gross anatomical dissection, we characterized the fiber tracts of the SFG based on their relationships to other well‐known neuroanatomic structures. Diffusion imaging from the Human Connectome Project from 10 healthy adult subjects was used for fiber tractography. We evaluated the SFG as a whole based on its connectivity with other regions. All tracts were mapped in both hemispheres, and a lateralization index was calculated based on resultant tract volumes. Ten cadaveric dissections were then performed using a modified Klingler technique to delineate the location of major tracts integrated within the SFG. We identified four major SFG connections: the frontal aslant tract connecting to the inferior frontal gyrus; the inferior fronto‐occipital fasciculus connecting to the cuneus, lingual gyrus, and superior parietal lobule; the cingulum connecting to the precuneus and parahippocampal gyrus/uncus; and a callosal fiber bundle connecting the SFG bilaterally. The functional networks of the SFG involve a complex series of white matter tracts integrated within the gyrus, including the FAT, IFOF, cingulum, and callosal fibers. Postsurgical outcomes related to this region may be better understood in the context of the fiber‐bundle anatomy highlighted in this study. Clin. Anat. 33:823–832, 2020. © 2019 Wiley Periodicals, Inc.
    Type of Medium: Online Resource
    ISSN: 0897-3806 , 1098-2353
    URL: Issue
    URL: Article
    DOI: 10.1002/ca.v33.6
    DOI: 10.1002/ca.23523
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2004511-6
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  • 10
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    Anatomy and White Matter Connections of the Middle Frontal Gyrus
    Elsevier BV ; 2021
    In:  World Neurosurgery Vol. 150 ( 2021-06), p. e520-e529
    Details
    In: World Neurosurgery, Elsevier BV, Vol. 150 ( 2021-06), p. e520-e529
    Type of Medium: Online Resource
    ISSN: 1878-8750
    URL: Article
    DOI: 10.1016/j.wneu.2021.03.045
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2021
    detail.hit.zdb_id: 2530041-6
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