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https://www.readbyqxmd.com/read/28713656/methodological-considerations-in-assessment-of-language-lateralisation-with-fmri-a-systematic-review
#1
Abigail R Bradshaw, Dorothy V M Bishop, Zoe V J Woodhead
The involvement of the right and left hemispheres in mediating language functions has been measured in a variety of ways over the centuries since the relative dominance of the left hemisphere was first known. Functional magnetic resonance imaging (fMRI) presents a useful non-invasive method of assessing lateralisation that is being increasingly used in clinical practice and research. However, the methods used in the fMRI laterality literature currently are highly variable, making systematic comparisons across studies difficult...
2017: PeerJ
https://www.readbyqxmd.com/read/28699372/hemispheric-asymmetries-in-dorsal-language-pathway-white-matter-tracts-a-magnetic-resonance-imaging-tractography-and-functional-magnetic-resonance-imaging-study
#2
Guilherme Silva, Alberto Citterio
Introduction Previous studies have shown that the arcuate fasciculus has a leftward asymmetry in right-handers that could be correlated with the language lateralisation defined by functional magnetic resonance imaging. Nonetheless, information about the asymmetry of the other fibres that constitute the dorsal language pathway is scarce. Objectives This study investigated the asymmetry of the white-matter tracts involved in the dorsal language pathway through the diffusion tensor imaging (DTI) technique, in relation to language hemispheric dominance determined by task-dependent functional magnetic resonance imaging (fMRI)...
January 1, 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/28633075/elective-unilateral-nodal-irradiation-in-head-and-neck-squamous-cell-carcinoma-a-paradigm-shift
#3
A Al-Mamgani, M Verheij, M W M van den Brekel
There is a long-standing convention to irradiate the great majority of head and neck squamous cell carcinoma (HNSCC) electively to both sides of the neck, to reduce the theoretically increased risk of contralateral regional failure (cRF). With the currently available diagnostic imaging techniques this treatment paradigm means, in our opinion, an overtreatment in considerable proportion of these patients. From all the published studies (n = 11, with 1116 patients treated in total), the incidence of cRF in patients with oropharyngeal cancer treated to one side of the neck is 2...
June 17, 2017: European Journal of Cancer
https://www.readbyqxmd.com/read/28626863/prolactin-correction-for-adequacy-of-petrosal-sinus-cannulation-may-diminish-diagnostic-accuracy-in-cushing-s-disease
#4
Sunita Mc De Sousa, Ann I McCormack, Shaun McGrath, David J Torpy
OBJECTIVE: Petrosal venous prolactin concentrations have been promoted to improve the diagnostic accuracy of inferior petrosal sinus sampling (IPSS), beyond that achieved with ACTH measurement alone, in diagnosing a pituitary ACTH source, and determining corticotrophinoma side (L/R). Our objective was to assess the effect of using prolactin to confirm adequacy of petrosal cannulation in a cohort of patients with ACTH-dependent Cushing's syndrome. DESIGN: Retrospective cohort study...
June 19, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28626411/dissociated-crossed-speech-areas-in-a-tumour-patient
#5
Jörg Mauler, Irene Neuner, Georg Neuloh, Bruno Fimm, Frank Boers, Martin Wiesmann, Hans Clusmann, Karl-Josef Langen, N Jon Shah
In the past, the eloquent areas could be deliberately localised by the invasive Wada test. The very rare cases of dissociated crossed speech areas were accidentally found based on the clinical symptomatology. Today functional magnetic resonance imaging (fMRI)-based imaging can be employed to non-invasively localise the eloquent areas in brain tumour patients for therapy planning. A 41-year-old, left-handed man with a low-grade glioma in the left frontal operculum extending to the insular cortex, tension headaches, and anomic aphasia over 5 months underwent a pre-operative speech area localisation fMRI measurement, which revealed the evidence of the transhemispheric disposition, where the dominant Wernicke speech area is located on the left and the Broca's area is strongly lateralised to the right hemisphere...
May 2017: Case Reports in Neurology
https://www.readbyqxmd.com/read/28603610/does-additional-reconstruction-of-the-anterolateral-ligament-during-a-primary-anterior-cruciate-ligament-reconstruction-affect-tibial-rotational-laxity-a-case-series
#6
Rohi Shah, Runveer Singh, Clodagh Dugdale, Guido Geutjens
BACKGROUND: The current evidence suggests that rotational stability in not restored in patients with anterior cruciate ligament (ACL) ruptures, despite reconstructive surgery. The graded pivot-shift is a useful clinical test to delineate extent of ligamentous laxity within the knee. Given its lateralised position, we hypothesized that reconstruction of the anterolateral ligament (ALL) would provide restraint to excessive internal rotation, restoring rotational stability. METHODS: 10 patients with MRI confirmed diagnosis of an isolated ACL rupture were included...
July 2017: Annals of Medicine and Surgery
https://www.readbyqxmd.com/read/28567347/effect-of-lengthening-along-the-anatomical-axis-of-the-femur-and-its-clinical-impact
#7
Khaled M Emara, Ahmed Nageeb Mahmoud, Ahmed K Emara, Mariam K Emara
AIM: To review and study the effect of lengthening along the anatomical axis of long bones and its relation to the mechanical axis deviation. METHODS: We try in this review to calculate and discuss the exact clinical impact of lengthening along the anatomical axis of the femur on affecting the limb alignment. Also we used a trigonometric formula to predict the change of the femoral distal anatomical mechanical angle (AMA) after lengthening along the anatomical axis...
May 18, 2017: World Journal of Orthopedics
https://www.readbyqxmd.com/read/28566349/lateralisation-helps-sailfish-snatch-sardines
#8
C Ruth Archer
No abstract text is available yet for this article.
June 1, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28562664/towards-the-automated-localisation-of-targets-in-rapid-image-sifting-by-collaborative-brain-computer-interfaces
#9
Ana Matran-Fernandez, Riccardo Poli
The N2pc is a lateralised Event-Related Potential (ERP) that signals a shift of attention towards the location of a potential object of interest. We propose a single-trial target-localisation collaborative Brain-Computer Interface (cBCI) that exploits this ERP to automatically approximate the horizontal position of targets in aerial images. Images were presented by means of the rapid serial visual presentation technique at rates of 5, 6 and 10 Hz. We created three different cBCIs and tested a participant selection method in which groups are formed according to the similarity of participants' performance...
2017: PloS One
https://www.readbyqxmd.com/read/28553860/frontal-aslant-tract-projections-to-the-inferior-frontal-gyrus
#10
Tomasz Szmuda, Marianna Rogowska, Paweł Słoniewski, Ahmed Abuhaimed, Marta Szmuda, Janusz Springer, Agnieszka Sabisz, Jarosław Dzierżanowski, Anna Starzyńska, Tomasz Przewoźny, Andrzej Skorek
Frontal aslant tract (FAT) is a white matter bundle connecting the pre-supplementary motor area (pre-SMA) and the supplementary motor area (SMA) with the inferior frontal gyrus (IFG). The purpose of the present study was to evaluate the anatomical variability of FAT. Total number of fibers and the lateralisation index (LI) were calculated. We attempted to find factors contributing to the diversity of FAT regarding IFG terminations to the pars opercularis (IFG-Op) and to the pars triangularis (IFG-Tr). Magnetic resonance imaging (MRI) of adult patients with diffusion tensor imaging (DTI) with total number of 98 hemispheres composed a cohort...
May 29, 2017: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/28455103/transcranial-doppler-ultrasonography-in-the-assessment-of-neurovascular-coupling-responses-to-cognitive-examination-in-healthy-controls-a-feasibility-study
#11
C A L Williams, R B Panerai, T G Robinson, V J Haunton
BACKGROUND: We tested the hypothesis that paradigms from the Addenbrooke's Cognitive Examination (ACE-III), including those that had not been studied using TCD previously (novel) versus those which had been (established), would elicit changes in CBF velocity (CBFv). NEW METHOD: Healthy subjects were studied with bilateral transcranial Doppler (TCD), beat-to-beat blood pressure (Finapres), continuous electrocardiogram (ECG), and end-tidal CO2 (nasal capnography)...
April 26, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28425325/macro-and-microstructural-alterations-of-the-subcortical-structures-in-episodic-cluster-headache
#12
András Király, Nikoletta Szabó, Árpád Párdutz, Eszter Tóth, János Tajti, Gergő Csete, Péter Faragó, Péter Bodnár, Délia Szok, Bernadett Tuka, Éva Pálinkás, Csaba Ertsey, László Vécsei, Zsigmond Tamás Kincses
Background Previous functional and structural imaging studies have revealed that subcortical structures play a key a role in pain processing. The recurring painful episodes might trigger maladaptive plasticity or alternatively degenerative processes that might be detected by MRI as changes in size or microstructure. In the current investigation, we aimed to identify the macro- and microstructural alterations of the subcortical structures in episodic cluster headache. Methods High-resolution T1-weighted and diffusion-weighted MRI images with 60 gradient directions were acquired from 22 patients with cluster headache and 94 healthy controls...
January 1, 2017: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/28374287/the-differential-contributions-of-conceptual-representation-format-and-language-structure-to-levels-of-semantic-abstraction-capacity
#13
REVIEW
Guido Gainotti
This paper reviews some controversies concerning the original and revised versions of the 'hub-and-spoke' model of conceptual representations and their implication for abstraction capacity levels. The 'hub-and-spoke' model, which is based on data gathered in patients with semantic dementia (SD), is the most authoritative model of conceptual knowledge. Patterson et al.'s (Nature Reviews Neuroscience, 8(12), 976-987, 2007) classical version of this model maintained that conceptual representations are stored in a unitary 'amodal' format in the right and left anterior temporal lobes (ATLs), because in SD the semantic disorder cuts across modalities and categories...
April 3, 2017: Neuropsychology Review
https://www.readbyqxmd.com/read/28353416/resting-state-fmri-a-review-on-methods-in-resting-state-connectivity-analysis-and-resting-state-networks
#14
K A Smitha, K Akhil Raja, K M Arun, P G Rajesh, Bejoy Thomas, T R Kapilamoorthy, Chandrasekharan Kesavadas
The inquisitiveness about what happens in the brain has been there since the beginning of humankind. Functional magnetic resonance imaging is a prominent tool which helps in the non-invasive examination, localisation as well as lateralisation of brain functions such as language, memory, etc. In recent years, there is an apparent shift in the focus of neuroscience research to studies dealing with a brain at 'resting state'. Here the spotlight is on the intrinsic activity within the brain, in the absence of any sensory or cognitive stimulus...
January 1, 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/28343987/age-related-reduction-of-hemispheric-lateralisation-for-spatial-attention-an-eeg-study
#15
Gemma Learmonth, Christopher S Y Benwell, Gregor Thut, Monika Harvey
A group-level visuospatial attention bias towards the left side of space (pseudoneglect) is consistently observed in young adults, which is likely to be a consequence of right parieto-occipital dominance for spatial attention. Conversely, healthy older adults demonstrate a rightward shift of this behavioural bias, hinting that an age-related reduction of lateralised neural activity may occur within visuospatial attention networks. We compared young (aged 18-25) and older (aged 60-80) adults on a computerised line bisection (landmark) task whilst recording event-related potentials (ERPs)...
June 2017: NeuroImage
https://www.readbyqxmd.com/read/28341145/facial-correlates-of-emotional-behaviour-in-the-domestic-cat-felis-catus
#16
Valerie Bennett, Nadine Gourkow, Daniel S Mills
Leyhausen's (1979) work on cat behaviour and facial expressions associated with offensive and defensive behaviour is widely embraced as the standard for interpretation of agonistic behaviour in this species. However, it is a largely anecdotal description that can be easily misunderstood. Recently a facial action coding system has been developed for cats (CatFACS), similar to that used for objectively coding human facial expressions. This study reports on the use of this system to describe the relationship between behaviour and facial expressions of cats in confinement contexts without and with human interaction, in order to generate hypotheses about the relationship between these expressions and underlying emotional state...
March 21, 2017: Behavioural Processes
https://www.readbyqxmd.com/read/28324136/the-inimitable-mouth-task-dependent-kinematic-differences-are-independent-of-terminal-precision
#17
Jason W Flindall, Claudia L R Gonzalez
Previous studies in our lab have described kinematic difference between grasp-to-eat and grasp-to-place movements, whereby participants produce smaller maximum grip apertures (MGAs) when grasping to bring the item to the mouth than when grasping to bring the item to a container near the mouth. This task difference is limited to right-handed movements, regardless of handedness; it has, therefore, been interpreted as evidence of left-hemisphere lateralization of the grasp-to-eat and other hand-to-mouth grasping movements...
March 21, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28322988/measurement-reliability-of-atypical-language-lateralisation-assessed-using-functional-transcranial-doppler-ultrasound
#18
Jessica C Hodgson, John M Hudson
It is well established that some individuals present with atypical, non-left hemisphere, cerebral lateralisation for language processing. However previous studies exploring the reliability of functional blood flow responses to detect lateralised activation during speech have focused only on individuals with typical left sided dominance. Here we report test-retest and between-task reliability measures obtained with functional transcranial Doppler ultrasound in 47 participants, including 9 with atypical language presentation...
March 16, 2017: Biological Psychology
https://www.readbyqxmd.com/read/28303565/morphometry-and-microanatomy-of-the-barbels-of-the-common-sawshark-pristiophorus-cirratus-pristiophoridae-implications-for-pristiophorid-behaviour
#19
R J Nevatte, J E Williamson, N G F Vella, V Raoult, B E Wueringer
The internal anatomy of the barbels of the common sawshark Pristiophorus cirratus was examined with light microscopy to clarify their sensory role. No sensory structures such as taste buds (chemoreception), ampullae of Lorenzini (electroreception) or free neuromasts (lateral line mechanoreception) could be located in the barbels. The presence of bundles of nerve fibres, however, indicates a tactile function for the barbels. Conveyance of information regarding potentially damaging stimuli (nociception) and temperature (thermoception) cannot be excluded at this stage...
May 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28276424/-11-c-metomidate-pet-ct-scanning-can-identify-aldosterone-producing-adenomas-after-unsuccessful-lateralisation-with-ct-mri-and-adrenal-venous-sampling
#20
J Ouyang, R Hardy, M Brown, T Helliwell, M Gurnell, D J Cuthbertson
No abstract text is available yet for this article.
July 2017: Journal of Human Hypertension
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