keyword
https://read.qxmd.com/read/38492041/a-clinico-anatomical-dissection-of-the-magnocellular-and-parvocellular-pathways-in-a-patient-with-the-riddoch-syndrome
#1
JOURNAL ARTICLE
Ahmad Beyh, Samuel E Rasche, Alexander Leff, Dominic Ffytche, Semir Zeki
The Riddoch syndrome is thought to be caused by damage to the primary visual cortex (V1), usually following a vascular event. This study shows that damage to the anatomical input to V1, i.e., the optic radiations, can result in selective visual deficits that mimic the Riddoch syndrome. The results also highlight the differential susceptibility of the magnocellular and parvocellular visual systems to injury. Overall, this study offers new insights that will improve our understanding of the impact of brain injury and neurosurgery on the visual pathways...
March 16, 2024: Brain Structure & Function
https://read.qxmd.com/read/38316692/functional-magnetic-resonance-imaging-fmri-as-adjunct-for-planning-laser-interstitial-thermal-therapy-litt-near-eloquent-structures
#2
JOURNAL ARTICLE
Ziad Rifi, Maya Harary, Patricia D Walshaw, Andrew J Frew, Richard G Everson, Aria Fallah, Noriko Salamon, Won Kim
LITT is a minimally-invasive laser ablation technique used to treat a wide variety of intracranial lesions. Difficulties performing intraoperative mapping have limited its adoption for lesions in/near eloquent regions. In this institutional case series, we demonstrate the utility of fMRI-adjunct planning for LITT near language or motor areas. Six out of 7 patients proceeded with LITT after fMRI-based tractography determined adequate safety margins for ablation. All underwent successful ablation without new or worsening postoperative symptoms requiring adjuvant corticosteroids, including those with preexisting deficits...
February 5, 2024: Acta Neurochirurgica
https://read.qxmd.com/read/38301240/the-use-of-advanced-neuroimaging-modalities-in-the-evaluation-of-low-grade-glioma-in-adults-a-literature-review
#3
REVIEW
Jakov Tiefenbach, Victor M Lu, Ashley R Metzler, Ali Palejwala, Sameah Haider, Michael E Ivan, Ricardo J Komotar, Ashish H Shah
Low-grade gliomas encompass a subgroup of cancerous glial cell growths within the central nervous system and are distinguished by their slow growth and relatively low malignant potential. Despite their less aggressive nature, these tumors can still cause significant neurological symptoms through the compression of surrounding neural and vascular structures and, in some instances, undergo malignant transformation. For these reasons, timely and appropriate evaluation and management of low-grade gliomas is critical...
February 2024: Neurosurgical Focus
https://read.qxmd.com/read/38189921/dual-task-gait-training-improves-cognition-and-resting-state-functional-connectivity-in-parkinson-s-disease-with-postural-instability-and-gait-disorders
#4
JOURNAL ARTICLE
Michela Leocadi, Elisa Canu, Elisabetta Sarasso, Andrea Gardoni, Silvia Basaia, Davide Calderaro, Veronica Castelnovo, Maria Antonietta Volontè, Massimo Filippi, Federica Agosta
OBJECTIVES: To assess whether dual-task gait/balance training with action observation training (AOT) and motor imagery (MI) ameliorates cognitive performance and resting-state (RS) brain functional connectivity (FC) in Parkinson's disease (PD) patients with postural instability and gait disorders (PIGD). METHODS: 21 PD-PIGD patients were randomized into 2 groups: (1) DUAL-TASK + AOT-MI group performed a 6-week training consisting of AOT-MI combined with practicing observed-imagined gait and balance exercises; and (2) DUAL-TASK group performed the same exercises combined with landscape-videos observation...
January 8, 2024: Journal of Neurology
https://read.qxmd.com/read/38176362/preoperative-plasticity-in-the-functional-naming-network-of-patients-with-left-insular-gliomas
#5
JOURNAL ARTICLE
Elisa Cargnelutti, Marta Maieron, Serena D'Agostini, Tamara Ius, Miran Skrap, Barbara Tomasino
Plasticity could take place as a compensatory process following brain glioma growth. Only a few studies specifically explored plasticity in patients affected by a glioma invading the left insula; even more, plasticity of the insular cortex in task-based functional language network is almost unexplored. In the current study, we explored potential plasticity in a consecutive series of 22 patients affected by a glioma centered to the left insula, by comparing their preoperative object-naming functional network with that of a group of healthy controls...
December 28, 2023: NeuroImage: Clinical
https://read.qxmd.com/read/38000842/imaging-and-stereotactic-electroencephalography-functional-networks-to-guide-epilepsy-surgery
#6
REVIEW
Derek J Doss, Graham W Johnson, Dario J Englot
Epilepsy surgery is a potentially curative treatment of drug-resistant epilepsy that has remained underutilized both due to inadequate referrals and incomplete localization hypotheses. The complexity of patients evaluated for epilepsy surgery has increased, thus new approaches are necessary to treat these patients. The paradigm of epilepsy surgery has evolved to match this challenge, now considering the entire seizure network with the goal of disrupting it through resection, ablation, neuromodulation, or a combination...
January 2024: Neurosurgery Clinics of North America
https://read.qxmd.com/read/37951030/altered-functional-connectivity-in-language-and-non-language-brain-networks-in-patients-diagnosed-with-acute-post-stroke-aphasia
#7
JOURNAL ARTICLE
Liying Han, Jun Ke, Dawei Zhang, Boye Ni, Yuanyuan Tao, Qingqing Zhou, Hongjun Zhu, Qi Fang
OBJECTIVE: A resting-state functional magnetic resonance imaging (rs-fMRI) approach was used to explore functional connectivity (FC) in language and non-language brain networks in acute post-stroke aphasia (PSA) patients, with a specific focus on the relationship between these fMRI results and patient clinical presentation. METHODS: In total, 20 acute PSA patients and 30 age-, sex-, and education level-matched healthy control (HC) participants were recruited and subjected to rs-fMRI imaging...
December 2023: Clinical Neurology and Neurosurgery
https://read.qxmd.com/read/37898030/a-rs-fmri-study-of-functional-connectivity-changes-between-thalamus-and-postcentral-gyrus-in-patients-with-neuropathic-pain-after-brachial-plexus-avulsion
#8
JOURNAL ARTICLE
Jin Zhu, Liang Shi, Yibing Su
BACKGROUND: The neuropathic pain (NPP) after brachial plexus avulsion (BPA) is common and difficult to cure, and thalamus and postcentral gyrus have been accepted to be the key nodes of mechanisms and pathways for pain. However, little attention has been paid on the thalamus-postcentral gyrus functional connectivity changes in NP patients after BPA. METHODS: Eighteen patients with NPP after BPA and twenty age and gender matched healthy controls were enrolled and underwent resting-state functional MRI (rs-fMRI) scans in this study...
October 24, 2023: Clinical Neurology and Neurosurgery
https://read.qxmd.com/read/37891749/neuropsychological-evaluation-and-functional-magnetic-resonance-imaging-tasks-in-the-preoperative-assessment-of-patients-with-brain-tumors-a-systematic-review
#9
REVIEW
Marta Pertichetti, Daniele Corbo, Francesco Belotti, Francesca Saviola, Roberto Gasparotti, Marco Maria Fontanella, Pier Paolo Panciani
BACKGROUND: Current surgical treatment of gliomas relies on a function-preserving, maximally safe resection approach. Functional Magnetic Resonance Imaging (fMRI) is a widely employed technology for this purpose. A preoperative neuropsychological evaluation should accompany this exam. However, only a few studies have reported both neuropsychological tests and fMRI tasks for preoperative planning-the current study aimed to systematically review the scientific literature on the topic. METHODS: PRISMA guidelines were followed...
September 28, 2023: Brain Sciences
https://read.qxmd.com/read/37763153/parcellation-based-connectivity-model-of-the-judgement-core
#10
JOURNAL ARTICLE
Jorge Hormovas, Nicholas B Dadario, Si Jie Tang, Peter Nicholas, Vukshitha Dhanaraj, Isabella Young, Stephane Doyen, Michael E Sughrue
Judgement is a higher-order brain function utilized in the evaluation process of problem solving. However, heterogeneity in the task methodology based on the many definitions of judgement and its expansive and nuanced applications have prevented the identification of a unified cortical model at a level of granularity necessary for clinical translation. Forty-six task-based fMRI studies were used to generate activation-likelihood estimations (ALE) across moral, social, risky, and interpersonal judgement paradigms...
September 16, 2023: Journal of Personalized Medicine
https://read.qxmd.com/read/37755462/correlation-of-glymphatic-system-abnormalities-with-parkinson-s-disease-progression-a-clinical-study-based-on-non-invasive-fmri
#11
JOURNAL ARTICLE
Jing-Cai Meng, Ming-Qiang Shen, Yan-Li Lu, Hong-Xuan Feng, Xin-Yi Chen, Da-Qiang Xu, Guan-Hui Wu, Qing-Zhang Cheng, Lin-Hui Wang, Qian Gui
BACKGROUND: The glymphatic system is reportedly involved in Parkinson's disease (PD). Based on previous studies, we aimed to confirm the correlation between the glymphatic system and PD progression by combining two imaging parameters, diffusion tensor image analysis along the perivascular space (DTI-ALPS), and enlarged perivascular spaces (EPVS). METHODS: Fifty-one PD patients and fifty healthy control (HC) were included. Based on the Hoehn-Yahr scale, the PD group was divided into early-stage and medium-to late-stage...
January 2024: Journal of Neurology
https://read.qxmd.com/read/37725167/a-state-of-the-art-review-on-deep-learning-for-estimating-eloquent-cortex-from-resting-state-fmri
#12
REVIEW
Daniel A Di Giovanni, D Louis Collins
Deep learning algorithms have greatly improved our ability to estimate eloquent cortex regions from resting-state brain scans for patients about to undergo neurosurgery. The use of deep learning has the potential to fully automate functional mapping of cortex in this context. We present a highly focused state-of-the-art review on current technology for estimating eloquent cortex from resting-state functional magnetic resonance scans and identify potential paths to meet this goal in the future.
September 19, 2023: Neurosurgical Review
https://read.qxmd.com/read/37668941/predicting-survival-in-glioblastoma-with-multimodal-neuroimaging-and-machine-learning
#13
JOURNAL ARTICLE
Patrick H Luckett, Michael Olufawo, Bidhan Lamichhane, Ki Yun Park, Donna Dierker, Gabriel Trevino Verastegui, Peter Yang, Albert H Kim, Milan G Chheda, Abraham Z Snyder, Joshua S Shimony, Eric C Leuthardt
PURPOSE: Glioblastoma (GBM) is the most common and aggressive malignant glioma, with an overall median survival of less than two years. The ability to predict survival before treatment in GBM patients would lead to improved disease management, clinical trial enrollment, and patient care. METHODS: GBM patients (N = 133, mean age 60.8 years, median survival 14.1 months, 57.9% male) were retrospectively recruited from the neurosurgery brain tumor service at Washington University Medical Center...
September 5, 2023: Journal of Neuro-oncology
https://read.qxmd.com/read/37668519/functional-mri-in-neuro-oncology-state-of-the-art-and-future-directions
#14
REVIEW
Luca Pasquini, Kyung K Peck, Mehrnaz Jenabi, Andrei Holodny
Since its discovery in the early 1990s, functional MRI (fMRI) has been used to study human brain function. One well-established application of fMRI in the clinical setting is the neurosurgical planning of patients with brain tumors near eloquent cortical areas. Clinical fMRI aims to preoperatively identify eloquent cortices that serve essential functions in daily life, such as hand movement and language. The primary goal of neurosurgery is to maximize tumor resection while sparing eloquent cortices adjacent to the tumor...
September 2023: Radiology
https://read.qxmd.com/read/37665382/predicting-neurologic-recovery-after-severe-acute-brain-injury-using-resting-state-networks
#15
JOURNAL ARTICLE
Matthew Kolisnyk, Karnig Kazazian, Karina Rego, Sergio L Novi, Conor J Wild, Teneille E Gofton, Derek B Debicki, Adrian M Owen, Loretta Norton
OBJECTIVE: There is a lack of reliable tools used to predict functional recovery in unresponsive patients following a severe brain injury. The objective of the study is to evaluate the prognostic utility of resting-state functional magnetic resonance imaging for predicting good neurologic recovery in unresponsive patients with severe brain injury in the intensive-care unit. METHODS: Each patient underwent a 5.5-min resting-state scan and ten resting-state networks were extracted via independent component analysis...
September 4, 2023: Journal of Neurology
https://read.qxmd.com/read/37663605/independent-component-analysis-a-reliable-alternative-to-general-linear-model-for-task-based-fmri
#16
JOURNAL ARTICLE
Kostakis Gkiatis, Kyriakos Garganis, Irene Karanasiou, Athanasios Chatzisotiriou, Basilios Zountsas, Nikolaos Kondylidis, George K Matsopoulos
BACKGROUND: Functional magnetic resonance imaging (fMRI) is a valuable tool for the presurgical evaluation of patients undergoing neurosurgeries. Although many pre-processing steps have been modified according to advances in recent years, statistical analysis has remained largely the same since the first days of fMRI. In this study, we examined the ability of Independent Component Analysis (ICA) to separate the activation of a language task in fMRI, and we compared it with the results of the General Lineal Model (GLM)...
2023: Frontiers in Psychiatry
https://read.qxmd.com/read/37532802/multiple-sclerosis-lesions-that-impair-memory-map-to-a-connected-memory-circuit
#17
JOURNAL ARTICLE
Isaiah Kletenik, Alexander L Cohen, Bonnie I Glanz, Michael A Ferguson, Shahamat Tauhid, Jing Li, William Drew, Mariann Polgar-Turcsanyi, Miklos Palotai, Shan H Siddiqi, Gad A Marshall, Tanuja Chitnis, Charles R G Guttmann, Rohit Bakshi, Michael D Fox
BACKGROUND: Nearly 1 million Americans are living with multiple sclerosis (MS) and 30-50% will experience memory dysfunction. It remains unclear whether this memory dysfunction is due to overall white matter lesion burden or damage to specific neuroanatomical structures. Here we test if MS memory dysfunction is associated with white matter lesions to a specific brain circuit. METHODS: We performed a cross-sectional analysis of standard structural images and verbal memory scores as assessed by immediate recall trials from 431 patients with MS (mean age 49...
August 2, 2023: Journal of Neurology
https://read.qxmd.com/read/37487945/intraoperative-identification-of-functional-brain-areas-with-rgb-imaging-using-statistical-parametric-mapping-simulation-and-clinical-studies
#18
JOURNAL ARTICLE
Charly Caredda, E Van Reeth, Laurent Mahieu-Williame, Raphaël Sablong, Michaël Sdika, Fabien C Schneider, Thiébaud Picart, Jacques Guyotat, Bruno Montcel
Complementary technique to preoperative fMRI and electrical brain stimulation (EBS) for glioma resection could improve dramatically the surgical procedure and patient care. Intraoperative RGB optical imaging is a technique for localizing functional areas of the human cerebral cortex that can be used during neurosurgical procedures. However, it still lacks robustness to be used with neurosurgical microscopes as a clinical standard. In particular, a robust quantification of biomarkers of brain functionality is needed to assist neurosurgeons...
July 22, 2023: NeuroImage
https://read.qxmd.com/read/37473486/deep-learning-in-neuroimaging-of-epilepsy
#19
REVIEW
Karla Batista García-Ramó, Carlos A Sanchez-Catasus, Gavin P Winston
In recent years, artificial intelligence, particularly deep learning (DL), has demonstrated utility in diverse areas of medicine. DL uses neural networks to automatically learn features from the raw data while this is not possible with conventional machine learning. It is helpful for the assessment of patients with epilepsy and whilst most published studies have been aimed at the automatic detection and prediction of seizures from electroencephalographic records, there is a growing number of investigations that use neuroimaging modalities (structural and functional magnetic resonance imaging, diffusion-weighted imaging and positron emission tomography) as input data...
July 6, 2023: Clinical Neurology and Neurosurgery
https://read.qxmd.com/read/37438098/uncovering-neuroanatomical-correlates-of-impaired-coordinated-movement-after-pallidal-deep-brain-stimulation
#20
JOURNAL ARTICLE
Brendan Santyr, Aaron Loh, Artur Vetkas, Dave Gwun, Wilson Kw Fung, Shakeel Qazi, Jurgen Germann, Alexandre Boutet, Can Sarica, Andrew Yang, Gavin Elias, Suneil K Kalia, Alfonso Fasano, Andres M Lozano
BACKGROUND: The loss of the ability to swim following deep brain stimulation (DBS), although rare, poses a worrisome risk of drowning. It is unclear what anatomic substrate and neural circuitry underlie this phenomenon. We report a case of cervical dystonia with lost ability to swim and dance during active stimulation of globus pallidus internus. We investigated the anatomical underpinning of this phenomenon using unique functional and structural imaging analysis. METHODS: Tesla (3T) functional MRI (fMRI) of the patient was used during active DBS and compared with a cohort of four matched patients without this side effect...
July 12, 2023: Journal of Neurology, Neurosurgery, and Psychiatry
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