Bilingual aphasia as the initial presentation of a hemorrhagic stroke: Case report

With a great number of bilingual individuals in the world, there is a growing need for understanding and studying language. In cases of bilingual aphasia, patterns of language recovery can vary. Case report: The present case refers to a male patient, 52 years old, right-handed, born in Arkansas-United States of America and resident for 20 years in the city of Santos, São Paulo. The patient is bilingual fluent in English and Portuguese and had a sudden language disorder associated with a right-sided strength and sensitivity deficit; Imaging exams showed a left lenticular nucleus hemorrhagic stroke. In the language assessment, he presented an important impairment of fluency, compression and repetition in the Portuguese language and relative preservation, with slight dysfunction in fluency in the English language. Symptomatic treatment was instituted with partial improvement of the symptoms. Keywords: bilingual aphasia; hemorrhagic stroke.

Functional Connectivity Density Alterations in Children with Strabismus and Amblyopia based on Resting-state Functional Magnetic Resonance Imaging (fMRI)

Purpose: To investigate functional connectivity density (FCD) values of brain areas in children with strabismus and amblyopia (SA) by resting-state functional magnetic resonance imaging (rs-fMRI).Methods: This study recruited 26 children (14 male, 12 female) with SA and 26 healthy children (14 male, 12 female) as healthy controls. Both groups matched in age, gender, educational level and socioeconomic background. All participants underwent fMRI scanning while resting. Visual function of participants was also evaluated by an ophthalmic examination; rs-fMRI data was then used to determine global and short-range FCD. Receiver operating characteristic curves were constructed to investigate whether there was a significant difference between children with SA and healthy controls. This experiment has passed the ethical approval and obtained the logic number cdyfy201511.Results: Global FCD values of children with SA were found to be remarkably decreased in the right cerebellum, left lenticular nucleus, putamen, and right superior frontal gyrus as compared with healthy controls; global FCD values of children with SA were increased in the right angular gyrus, left middle cingulate gyrus, left angular gyrus, right superior parietal gyrus, and right middle frontal gyrus. In children with SA, short-range FCD values were found to be remarkably decreased in regions of the middle right temporal pole, right cerebellum, left lenticular nucleus, putamen, left hippocampus, right hippocampus, left thalamus, left cerebellum; values were increased in the right superior parietal gyrus as compared with healthy controls.Conclusion: We noted abnormal neural connectivity in some brain areas of children with SA; the detailing of such connectivity aberrations is helpful in exploring the pathophysiology of SA and providing useful information for future clinical management.

Hemi Chorea and Hemi Balllismus: A Rare Presentation of Prolonged Uncontrolled Hyperglycemia

Background: Hemi chorea and hemiballismus interestingly, are rare presentations of severe chronic persistent hyperglycemia which resolves with correction of hyperglycemia in most cases. Clinical Case: Here we report a case of a 67 YO woman with a PMH of prolonged uncontrolled DM evidenced by average baseline HbA1c of 14.6% (n<5.7%) presenting with dance-like movements of the left arm and mouth deviation. Initially the patient presented as a stroke code. Vital signs were unremarkable. On Physical exam, there was mild L face weakness and obvious abnormal hand movement. Other neurological exams were unremarkable for stroke. MRI showed the typical decreased T2/flair signal within the right frontal lobe, white matter, right caudate head, and bilateral lenticular nucleus with mild increased T1 signal of the right caudate and lenticular nucleus compatible with hyperglycemic nonketotic hemichorea hemiballismus. Her significant admission lab values of random blood glucose of 306mg/dl (n 74-200mg/dl), HbA1c of 18.7% (n<5.7%), urine sugar >1000 (n neg mg/dl), absence of ketonuria and acidosis also support the diagnosis. With improvement in her blood sugar control, there was a significant decrease in her abnormal hand movements. However, sugar control was not enough as there was the need for additional medications to improve the chorea such as risperidone and tetrabenazine. Eventually over the course of many months of tight glucose control, there was significant symptomatic improvement. While the exact etiology is unclear, the hyperintensity usually seen on head CT scan and the pathognomonic T1 hyperintensity of the basal ganglia on MRI is postulated to be related to metabolic abnormalities caused by hyper viscosity of the blood in the end arteries supplying the basal ganglia. Many case reports associated movement disorders to chronic persistent hyperglycemia but there are many other cases that described hemiballismus in acute cases of hyperglycemia or persisting despite adequate glycemic correction. Most of the patients described had an underlying markedly elevated HbA1c as a common factor which suggests that a prolonged period of uncontrolled hyperglycemia may be necessary to produce hemiballismus. When thinking of complications of diabetes, we often think of CAD, ESRD, CVD, DKA and HHS. We aim to create an awareness of this rare association and to recognize hemiballismus as one of the varying presentations of severe hyperglycemia in order to ensure early diagnosis and treatment of this condition. Conclusion: Hemichorea and hemiballismus are increasingly becoming popular as one of the many complications of severe chronic or acute hyperglycemia. This warrants recognition in literature.

Quantitative analysis of internal components of the human crystalline lens during accommodation in adults

To quantitatively analyze changes in the inner components of the human crystalline lens during accommodation in adults. Eyes of 23 subjects were sequentially examined using CASIA2 Optical Coherence Tomography under 0D, − 3D and − 6D accommodation states. The anterior chamber depth (ACD), anterior and posterior crystalline lens radius of the curvature (ALRC and PLRC) were obtained using built-in software. The lens thickness (LT), lenticular nucleus thickness (NT), anterior cortex thickness (ACT), posterior cortex thickness (PCT), anterior and posterior lenticular nucleus radius of the curvature (ANRC and PNRC), anterior and posterior lenticular nucleus vertex (ANV and PNV) were quantified manually with the Image-pro plus software. During accommodation, the ACD became significantly shallower and LT significantly increased. For changes in the lens, the ALRC decreased by an average magnitude (related to accommodative stimuli) 0.44 mm/D, and PLRC decreased 0.09 mm/D. There was no difference for the ACT and PCT in different accommodation states. For lenticular nucleus response, NT increased on average by 30 μm/D. Both the ANRC and PNRC decreased on average by 212 μm/D and 115 μm/D respectively. The ANV moved forward on average by 0.07 mm under − 3D accommodative stimuli and 0.16 mm for − 6D. However, there was no statistically significant difference between different accommodation states in the PNV movement. Under accommodation stimulation, lens thickness changed mainly due to the lenticular nucleus, but not the cortex. For the lenticular nucleus, both the ANRC and PNRC decreased and ANRC changed the most. The anterior surface of the nucleus moved forward while the posterior surface of the nucleus moved backward but only slightly.

Childhood ischaemic stroke in the basal ganglia can lead to fine motor and anxiety disorders: a retrospective analysis and follow-up of 109 cases

Background Stroke in children easily causes long-term dysfunction. Whether the prognoses of motor and anxiety disorders are related to the affected stroke area has not been reported. Methods One hundred nine cases of children with ischaemic stroke were reviewed and divided into three groups: lenticular nucleus lesions only (lenticular nucleus group), lenticular nucleus and caudate head lesions (caudate head group), and lenticular nucleus and thalamus lesions (thalamus group). Overall prognosis was evaluated by the mRS score. The SCAS-P was used to evaluate anxiety in children aged ≥6 years. Results mRS scores were ≤ 2 points (mean: 0.62), no significant difference among groups. 3/21 (14.2%) patients in the caudate head group changed handedness, which is significantly higher than other groups. Patients with lesions in thalamus group had significantly higher SCAS-P scores. Conclusions The overall prognosis of children with basal ganglia ischaemic stroke is good. However, hand preference changes and anxiety disorders may develop. Patients in the caudate head groups are more likely to suffer from fine motor disorders and changes in handedness. Patients within the thalamus group are more prone to anxiety than patients in the other groups. Anxiety disorders should be noted in children with basal ganglia stroke.

Multimodal magnetic resonance imaging analysis in the characteristics of Wilson’s disease: A case report and literature review

Wilson’s disease (WD) is an inherited disorder of copper metabolism. Multimodal magnetic resonance imaging (MRI) has been reported to provide evidence of the extent and severity of brain lesions. However, there are few studies related to the diagnosis of WD with multimodal MRI. Here, we reported a WD patient who was subjected to Sanger sequencing, conventional MRI, and multimodal MRI examinations, including susceptibility-weighted imaging (SWI) and arterial spin labeling (ASL). Sanger sequencing demonstrated two pathogenic mutations in exon 8 of the ATP7B gene. Slit-lamp examination revealed the presence of Kayser–Fleischer rings in both eyes, as well as low serum ceruloplasmin and high 24-h urinary copper excretion on admission. Although the substantia nigra, red nucleus, and lenticular nucleus on T1-weighted imaging and T2-weighted imaging were normal, SWI and ASL showed hypointensities in these regions. Besides, decreased cerebral blood flow was found in the lenticular nucleus and the head of caudate nucleus. The patient recovered well after 1 year and 9 months of follow-up, with only a Unified Wilson Disease Rating Scale score of 1 for neurological symptom. Brain multimodal MRI provided a thorough insight into the WD, which might make up for the deficiency of conventional MRI.

Bilingual aphasia after stroke. Case report

Context: With the largest number of bilingual individuals in the world, there is a growing need for understanding and studying language in different populations. In cases of bilingual aphasia, patterns of language recovery can vary. Parallel, or simultaneous, recovery in both languages is the most common type of language recovery, followed by differential recovery, where there is an improvement in one language compared to another. This case report was approved by the Ethics Committee of Universidade Metropolitana de Santos. Case Report: The present case refers to a male patient, 52 years old, righthanded, born in Arkansas-United States of America and resident for 20 years in the city of Santos, São Paulo. The patient is bilingual fluent in English and Portuguese and had a sudden deficit in strength and sensitivity in the right hemibody, associated with language disorders. Imaging exams showed a hemorrhagic lesion in the topography of the left lenticular nucleus. In the neurological evaluation, hemiparesis and proportioned and complete hemiparesis were shown on the right. In the language assessment, he presented an important impairment of fluency, compression and repetition in the Portuguese language and relative preservation, with slight dysfunction in fluency in the English language. Conclusions: Symptomatic treatment was instituted and after 12 months he had partial improvement of motor symptoms and complete aphasia.

Childhood ischaemic stroke in the basal ganglia can lead to fine motor and anxiety disorders: a retrospective analysis and follow-up of 109 cases

Backgroud:Stroke in children easily causes long-term dysfunction. Whether the prognoses of motor and anxiety disorders are related to the affected stroke area has not been reported. Methods: 109 cases of children with ischaemic stroke were reviewed and divided into three groups: lenticular nucleus lesions only (lenticular nucleus group), lenticular nucleus and caudate head lesions (caudate head group), and lenticular nucleus and thalamus lesions (thalamus group). Overall prognosis was evaluated by the mRS score. The SCAS-P was used to evaluate anxiety in children aged ≥6 years. Results: mRS scores were ≤2 points (mean: 0.62), no significant difference among groups. 3/21 (14.2%) patients in the caudate head group changed handedness, which is significantly higher than other groups. Patients with lesions in thalamus group had significantly higher SCAS-P scores. Conclusions: The overall prognosis of children with basal ganglia ischaemic stroke is good. However, hand preference changes and anxiety disorders may develop. Patients in the caudate head groups are more likely to suffer from fine motor disorders and changes in handedness. Patients within the thalamus group are more prone to anxiety than patients in the other groups. Anxiety disorders should be noted in children with basal ganglia stroke.

Asymmetric Functional Gradients in the Human Subcortex

ABSTRACTA central principle in our understanding of cerebral cortical organization is that homotopic left and right areas are functionally linked to each other, and also connected with structures that share similar functions within each cerebral cortical hemisphere. Here we refer to this concept as interhemispheric functional symmetry (IHFS). While multiple studies have described the distribution and variations of IHFS in the cerebral cortex, descriptions of IHFS in the subcortex are largely absent in the neuroscientific literature. Further, the proposed anatomical basis of IHFS is centered on callosal and other commissural tracts. These commissural fibers are present in virtually all cerebral cortical areas, but almost absent in the subcortex. There is thus an important knowledge gap in our understanding of subcortical IHFS. What is the distribution and variations of subcortical IHFS, and what are the anatomical correlates and physiological implications of this important property in the subcortex? Using fMRI functional gradient analyses in a large dataset (Human Connectome Project, n=1003), here we explored IHFS in human thalamus, lenticular nucleus, cerebellar cortex, and caudate nucleus. Our detailed descriptions provide an empirical foundation upon which to build hypotheses for the anatomical and physiological basis of subcortical IHFS. Our results indicate that direct or driver cerebral cortical afferent connectivity, as opposed to indirect or modulatory cerebral cortical afferent connectivity, is associated with stronger subcortical IHFS in thalamus and lenticular nucleus. In cerebellar cortex and caudate, where there is no variability in terms of either direct vs. indirect or driver vs. modulatory cerebral cortical afferent connections, connectivity to cerebral cortical areas with stronger cerebral cortical IHFS is associated with stronger IHFS in the subcortex. These two observations support a close relationship between subcortical IHFS and connectivity between subcortex and cortex, and generate new testable hypotheses that advance our understanding of subcortical organization.