scholarly journals Hyperlalia: A Right Cerebral Hemisphere Syndrome

1990 ◽  
Vol 3 (3) ◽  
pp. 143-151 ◽  
Author(s):  
Atsushi Yamadori ◽  
Yukio Osumi ◽  
Masayasu Tabuchi ◽  
Etsuro Mori ◽  
Takashi Yoshida ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cerebral Hemisphere ◽  
Right Hemisphere ◽  
Typical Case ◽  
Behavioural Syndrome ◽  
New Right ◽  
Right Cerebral Hemisphere ◽  
The Right ◽  
The Voice ◽  
The Brain

We describe a new right hemispheric behavioural syndrome for which we propose the name “hyperlalia”. In a typical case an apparently unconcerned and expressionless patient is easily prompted to remarkable volubility with a content which is loose and incoherent. The voice is low and monotonous. All the lesions confirmed by computed tomography of the brain overlapped in the perisylvian area in the territory of the right middle cerebral artery. Loss of a subtle balance between the left hemispheric speech area and the corresponding area in the right hemisphere caused by acute damage of the right perisylvian area may have resulted in disinhibition of the speech function. Similarities and dissimilarities with the known pathology of talkativeness are also discussed.

Left-Cerebral Hemisphere Superiority in Tachistoscopic Word-Recognition Performances

1970 ◽  
Vol 30 (3) ◽  
pp. 763-766 ◽  
Author(s):  
Walter F. McKeever ◽  
Maurice D. Huling
Keyword(s):  
Word Recognition ◽  
Left Hemisphere ◽  
Cerebral Hemisphere ◽  
Right Hemisphere ◽  
Left Cerebral Hemisphere ◽  
Right Cerebral Hemisphere ◽  
Recognition Ability ◽  
Efficient Route ◽  
The Right ◽  
The Brain

Under conditions of monocular unihemispheric projection of word stimuli to the brain, 10 normal Ss uniformly showed superior word recognition ability of the left, as opposed to the right, cerebral hemisphere. Left-hemisphere recognitions were significantly more frequent than right-hemisphere recognitions for both eyes, but the extent of left-hemisphere superiority was significantly greater for the left eye. The results support the hypothesis that words projected to the right hemisphere traverse a less efficient route to the language centers of the left hemisphere.

scholarly journals Studies on semantic priming effects in right hemisphere stroke: A systematic review

2013 ◽  
Vol 7 (2) ◽  
pp. 155-163
Author(s):  
Juliana de Lima Müller ◽  
Jerusa Fumagalli de Salles
Keyword(s):  
Systematic Review ◽  
Semantic Priming ◽  
Cerebral Hemisphere ◽  
Semantic Processing ◽  
Right Hemisphere ◽  
Priming Effects ◽  
Right Cerebral Hemisphere ◽  
The Right ◽  
Right Hemisphere Stroke

ABSTRACT The role of the right cerebral hemisphere (RH) associated with semantic priming effects (SPEs) must be better understood, since the consequences of RH damage on SPE are not yet well established. Objective: The aim of this article was to investigate studies analyzing SPEs in patients affected by stroke in the RH through a systematic review, verifying whether there are deficits in SPEs, and whether performance varies depending on the type of semantic processing evaluated or stimulus in the task. Methods: A search was conducted on the LILACS, PUBMED and PSYCINFO databases. Results: Out of the initial 27 studies identified, 11 remained in the review. Difficulties in SPEs were shown in five studies. Performance does not seem to vary depending on the type of processing, but on the type of stimulus used. Conclusion: This ability should be evaluated in individuals that have suffered a stroke in the RH in order to provide treatments that will contribute to their recovery.

scholarly journals Dyke-Davidoff-Masson Syndrome

2013 ◽  
Vol 52 (189) ◽  
pp. 272-274
Author(s):  
Kalyan Paudel ◽  
Anand Venugopal
Keyword(s):  
Computed Tomography ◽  
Early Childhood ◽  
Cerebral Hemisphere ◽  
Parietal Lobe ◽  
Degenerative Changes ◽  
Cerebral Peduncle ◽  
Upper And Lower Extremities ◽  
Uncommon Condition ◽  
The Right ◽  
The Brain

Dyke-Davidoff-Masson syndrome refers to atrophy of one cerebral hemisphere (hemiatrophy) due to an insult to the brain in fetal or early childhood period. This is an uncommon condition. We present a case of a nine month- old female presented with seizure and weakness of the right upper and lower extremities and subsequently computed tomography was performed and showed hemiatrophy of the left fronto-parietal lobe with degenerative changes in the left cerebral peduncle. Keywords: Dyke-Davidoff-Masson syndrome; hemiatrophy; hemiplegia.

Aphasia Syndromes: Introduction and Value in Clinical Practice

2017 ◽  
Author(s):  
Anastasia M. Raymer ◽  
Leslie J. Gonzalez Rothi
Keyword(s):  
Language Processing ◽  
Cerebral Hemisphere ◽  
Right Hemisphere ◽  
Communication Disorders ◽  
Auditory Comprehension ◽  
Neurologic Injury ◽  
Right Cerebral Hemisphere ◽  
The Right ◽  
Verbal Output

Neurologic damage affecting the left cerebral hemisphere leads to impairments in comprehension and expression of language in the verbal modality (aphasia) and in the written modality (dyslexia and dysgraphia). Impairment patterns take various forms, differing in the fluency/nonfluency of verbal output and integrity of auditory comprehension, repetition, and word retrieval abilities. The divergent classifications of aphasia allow reflection on neural and psychological correlates of specific aspects of language processing in verbal and written modalities. Neurologic damage affecting the right cerebral hemisphere can lead to changes in social and prosodic communication, speaking to the role of the right hemisphere in language processing. Patterns of language breakdown following neurologic injury have implications for assessment and intervention for affected individuals. Whereas perspectives vary on interpretation of the language breakdown across disciplines, this volume’s purpose is to facilitate interactions across disciplines to improve the lives of those with aphasia and related communication disorders.

scholarly journals Delusional Misidentification Incident in a Right Hemisphere Stroke Patient

1991 ◽  
Vol 4 (2) ◽  
pp. 81-87 ◽  
Author(s):  
Andrew W. Young ◽  
Brenda M. Flude ◽  
Andrew W. Ellis
Keyword(s):  
Facial Expressions ◽  
Cerebral Hemisphere ◽  
Right Hemisphere ◽  
Face Matching ◽  
Right Cerebral Hemisphere ◽  
Processing Abilities ◽  
Unfamiliar Face Matching ◽  
Unfamiliar Face ◽  
The Right ◽  
Right Hemisphere Stroke

We report a delusional misidentification incident lasting some hours in which a man who had suffered a right hemisphere stroke, HW, mistook a student for his daughter. Investigation of HW's face processing abilities showed unimpaired ability to recognize familiar faces and match facial expressions, but severe impairments of unfamiliar face matching both on the Benton test and a task requiring the matching of disguised and undisguised faces. The incident shows some similarity to the Frégoli delusion, which has also been noted following brain injury affecting the right cerebral hemisphere.

The Distribution of Radioiodine-Labeled N-Isopropyl-plodoamphetamine in Permanently Ischemic Brain of the Mongolian Gerbil

1988 ◽  
Vol 27 (01) ◽  
pp. 5-7 ◽  
Author(s):  
H. Hoshi ◽  
K. Watanabe ◽  
T. Ueda ◽  
T. Yamaguchi ◽  
S. Jinnouchi
Keyword(s):  
Cerebral Ischemia ◽  
Cerebral Hemisphere ◽  
Mongolian Gerbils ◽  
Time Intervals ◽  
Ether Anesthesia ◽  
Ischemic Brain ◽  
Normal Value ◽  
Right Cerebral Hemisphere ◽  
The Right ◽  
The Brain

In a study of the distribution of N-isopropyl-p-131l-iodoamphetamine (IMP) in the permanently ischemic brain of 35 mongolian gerbils, the right common carotid artery was ligated under ether anesthesia. After given time intervals, MBq (50μCi) of IMP was injected into 17 gerbils which had severe neurological symptoms, and into 3 normal gerbils for controls. One minute there after each gerbil was sacrified and brain autoradiography was performed. The activity of IMP in various parts of the brain was calculated from each autoradiogram. Low perfusion areas were observed in the right cerebral hemisphere and the brain stem (5-25% of normal value) from the first minute up to 24 h after ligation. In addition, low perfusion areas were also observed in the left cerebral hemisphere (40-60% of normal value) which represented a remote effect. These results suggest the usefulness of IMP for demonstrating cerebral ischemia and diaschisis.

Rembrandt's Portraits: Approach or Avoid?

Leonardo ◽  
2006 ◽  
Vol 39 (3) ◽  
pp. 253-256 ◽  
Author(s):  
James A. Schirillo ◽  
Melissa A. Fox
Keyword(s):  
Sexual Selection ◽  
Gender Difference ◽  
Cerebral Hemisphere ◽  
Right Hemisphere ◽  
Sexual Attractiveness ◽  
Left Cheek ◽  
Right Cerebral Hemisphere ◽  
The Brain

In 74% of Rembrandt's female portraits, the subject's left cheek faces the viewer. However, this occurs in only 26% of his male portraits. This asymmetry is consistent with viewers' assessment of Rembrandt's left-cheeked male portraits as preferably avoided, which may indicate that aggressive dominance is governed by the contralateral right hemisphere of the brain, while the rating of left-cheeked female faces as preferably approached may indicate sexual attractiveness. Rembrandt's exposed-cheek gender difference suggests that both sexual selection and dominance are governed by the more emotionally oriented right cerebral hemisphere.

scholarly journals Shifting of global aphasia to Wernicke’s aphasia in a patient with intact motor function: a case report

BMC Neurology ◽  
2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Ya-Chi Chuang ◽  
Chuan-Ching Liu ◽  
I-Ching Yu ◽  
Yu-Lin Tsai ◽  
Shin-Tsu Chang
Keyword(s):  
Computed Tomography ◽  
Right Hemisphere ◽  
Single Photon ◽  
Ct Perfusion ◽  
Single Case ◽  
Photon Emission ◽  
Emission Computed Tomography ◽  
Speech Fluency ◽  
Language Functions ◽  
The Right

Abstract Background Global aphasia without hemiparesis (GAWH) is a rare stroke syndrome characterized by the dissociation of motor and language functions. Here, we present a case of GAWH with the patient later regaining speech fluency. Case presentation A 73-year-old man was admitted to our emergency department immediately after an episode of syncope. On arrival, we noted his global aphasia but without any focal neurologic signs. Computed tomography (CT) perfusion scans showed a large hypodense region over his left perisylvian area. Under the impression of acute ischaemic stroke, he received recombinant tissue plasminogen activator (rtPA) injection and was treated as an inpatient. The patient was later discharged with GAWH status and received regular speech rehabilitation. After 14 months of rehabilitation, the patient gradually recovered his language expression ability. The degree of aphasia was evaluated with the Concise Chinese Aphasia Test (CCAT), and we obtained brain single photon emission computed tomography (SPECT) scans to assess cerebral blood flow. Conclusion A patient with severe impairments of Broca’s and Wernicke’s areas was able to talk fluently despite being unintelligible. SPECT revealed relative high level of radioactivity uptake in the right frontal lobe, suggesting the deficits in speech fluency could have been compensated by the right hemisphere. Although this is a single case demonstration, the results may strengthen the role of the right hemisphere in GAWH patients and suggests additional study that examines the possible benefits of stimulating activity at right homologous regions for recovering language function after global aphasia.

Neurospect Findings in Patients Exposed to Neurotoxic Chemicals

1994 ◽  
Vol 10 (4-5) ◽  
pp. 561-571
Author(s):  
Gunnar Heuser ◽  
Ismael Mena ◽  
Francisca Alamos
Keyword(s):  
Elderly Patients ◽  
Qualitative Analysis ◽  
Right Hemisphere ◽  
Young Patients ◽  
Chronic Fatigue ◽  
Psychiatric Symptomatology ◽  
Elderly Individuals ◽  
Parietal Lobes ◽  
The Right ◽  
The Brain

Exposures to neurotoxic chemicals such as pesticides, glues, solvents, etc. are known to induce neurologic and psychiatric symptomatology. We report on 41 patients 16 young patients (6 males, 10 females, age 34 8 yrs.) and 25 elderly patients (9 males, 16 females, age 55 7 yrs). Fifteen of them were exposed to pesticides, and 29 to solvents. They were studied with quantitative and qualitative analysis of regional cerebral bood flow (rCBF), performed with 30 mCi of Xe-133 by inhalation, followed by 30 mCi of Tc-HMPAO given intravenously. Imaging was performed with a brain dedicated system, distribution of rCBF was assessed with automatic ROI definition, and HMPAO was normalized to maximal pixel activity in the brain. Results of Xe rCBF are expressed as mean and S.D. in ml/min/100g, and HMPAO as mean and S.D. uptake per ROI, and compared with age-matched controls 10 young and 20 elderly individuals. Neurotoxics HMPAO Uptake Young Elderly R. Orbital frontal R. Dorsal frontal .70 .66 p < 0.05 R. Temporal .64 p < 0.001 R. Parietal .66 .66 We conclude that patients exposed to chemicals present with diminished CBF, worse in the right hemisphere, with random presentation of areas of hypoperfusion, more prevalent in the dorsal frontal and parietal lobes. These findings are significantly different from observations in patients with chronic fatigue and depression, suggesting primary cortical effect, possibly due to a vasculitis process.

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