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Search Results: 1 - 10 of 132 matches for " fusiform gyrus "
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Cross-modal connectivity of the secondary auditory cortex with higher visual area in the congenitally deaf—A case study  [PDF]
Yul-Wan Sung, Seiji Ogawa
Journal of Biomedical Science and Engineering (JBiSE) , 2013, DOI: 10.4236/jbise.2013.63A040
Abstract:

It is well known that auditory cortical areas are activated by visual stimulation in the deaf. However, it is not known whether the information enters from the primary visual area or high-level visual areas. In this study, we used visual language stimulation to examine visual-auditory functional connectivity. For this, we used functional magnetic resonance imaging (fMRI) in a congenitally deaf subject to localize areas in the auditory cortex that showed cross-modal reorganization for the processing of visual language inputs and estimate areas in the visual ventral stream, from which language signal inputs enter the auditory areas in the congenitally deaf. We found that the anterior region of the secondary auditory cortex in the superior temporal gyrus showed language-specific activation and that the visual inputs into the area were from the fusiform gyrus, which is a high-level visual area.

Fusiform Correlates of Facial Memory in Autism
Haley G. Trontel,Tyler C. Duffield,Erin D. Bigler,Alyson Froehlich,Molly B.D. Prigge,Jared A. Nielsen,Jason R. Cooperrider,Annahir N. Cariello,Brittany G. Travers,Jeffrey S. Anderson,Brandon A. Zielinski,Andrew Alexander,Nicholas Lange,Janet E. Lainhart
Behavioral Sciences , 2013, DOI: 10.3390/bs3030348
Abstract: Prior studies have shown that performance on standardized measures of memory in children with autism spectrum disorder (ASD) is substantially reduced in comparison to matched typically developing controls (TDC). Given reported deficits in face processing in autism, the current study compared performance on an immediate and delayed facial memory task for individuals with ASD and TDC. In addition, we examined volumetric differences in classic facial memory regions of interest (ROI) between the two groups, including the fusiform, amygdala, and hippocampus. We then explored the relationship between ROI volume and facial memory performance. We found larger volumes in the autism group in the left amygdala and left hippocampus compared to TDC. In contrast, TDC had larger left fusiform gyrus volumes when compared with ASD. Interestingly, we also found significant negative correlations between delayed facial memory performance and volume of the left and right fusiform and the left hippocampus for the ASD group but not for TDC. The possibility of larger fusiform volume as a marker of abnormal connectivity and decreased facial memory is discussed.
A study on neural mechanism of face processing based on fMRI

Jiangang Liu,Jie Tian,Kang Lee,Jun Li,

自然科学进展 , 2008,
Abstract: Recently, there were debates about the specificity of lateral middle fuisform in face processing. The debates focused on whether these areas were specialized in face processing or involved in processing of visual expertise and categorization at individual level. The present study aims to investigate the neural mechanism of face processing, using Chinese characters as comparison stimuli. Chinese characters are greatly similar to faces on a variety of dimensions, among which the most significant one is that both faces and Chinese characters not only are extremely familiar to literate Chinese adults but also are processed at individual level. In the present study, faces and Chinese characters activated bilateral middle fusiform with great correlation. Greater activities were observed in the right fusiform face area (FFA) for faces than for Chinese characters. These results demonstrate that FFA is specialized in face processing per se rather than the processing of visual expertise and categorization at individual level.
Holistic Face Categorization in Higher Order Visual Areas of the Normal and Prosopagnosic Brain: Toward a Non-Hierarchical View of Face Perception
Bruno Rossion,Laurence Dricot,Rainer Goebel,Thomas Busigny
Frontiers in Human Neuroscience , 2011, DOI: 10.3389/fnhum.2010.00225
Abstract: How a visual stimulus is initially categorized as a face in a network of human brain areas remains largely unclear. Hierarchical neuro-computational models of face perception assume that the visual stimulus is first decomposed in local parts in lower order visual areas. These parts would then be combined into a global representation in higher order face-sensitive areas of the occipito-temporal cortex. Here we tested this view in fMRI with visual stimuli that are categorized as faces based on their global configuration rather than their local parts (two-tones Mooney figures and Arcimboldo’s facelike paintings). Compared to the same inverted visual stimuli that are not categorized as faces, these stimuli activated the right middle fusiform gyrus (“Fusiform face area”) and superior temporal sulcus (pSTS), with no significant activation in the posteriorly located inferior occipital gyrus (i.e., no “occipital face area”). This observation is strengthened by behavioral and neural evidence for normal face categorization of these stimuli in a brain-damaged prosopagnosic patient whose intact right middle fusiform gyrus and superior temporal sulcus are devoid of any potential face-sensitive inputs from the lesioned right inferior occipital cortex. Together, these observations indicate that face-preferential activation may emerge in higher order visual areas of the right hemisphere without any face-preferential inputs from lower order visual areas, supporting a non-hierarchical view of face perception in the visual cortex.
The Gender of Face Stimuli is Represented in Multiple Regions in the Human Brain
Geraint Rees,Alumit Ishai
Frontiers in Human Neuroscience , 2011, DOI: 10.3389/fnhum.2010.00238
Abstract: Face perception in humans is mediated by activation in a network of brain areas. Conventional univariate fMRI data analysis has not localized differential responses to viewing male as compared with viewing female faces within this network. We tested whether we could detect neural response patterns specific to viewing male vs. female faces in 40 participants. Replicating earlier work, face stimuli evoked activation in the core (inferior occipital gyrus, IOG; fusiform gyrus, FG; and superior temporal sulcus, STS), as well as extended (amygdala, inferior frontal gyrus, IFG; insula, INS; and orbitofrontal cortex, OFC) regions of the face network. Multivariate pattern classification of activity within these regions revealed successful decoding of gender information, significantly above chance, in the IOG, FG, STS, IFG, INS, and OFC, but not in the amygdala. Multiple control regions indicated that this result might be restricted to face-responsive regions. Our findings suggest that gender information is distributed across the face network and is represented in the core regions that process invariant facial features, as well as the extended regions that process changeable aspects of faces.
Impaired social brain network for processing dynamic facial expressions in autism spectrum disorders
Sato Wataru,Toichi Motomi,Uono Shota,Kochiyama Takanori
BMC Neuroscience , 2012, DOI: 10.1186/1471-2202-13-99
Abstract: Background Impairment of social interaction via facial expressions represents a core clinical feature of autism spectrum disorders (ASD). However, the neural correlates of this dysfunction remain unidentified. Because this dysfunction is manifested in real-life situations, we hypothesized that the observation of dynamic, compared with static, facial expressions would reveal abnormal brain functioning in individuals with ASD. We presented dynamic and static facial expressions of fear and happiness to individuals with high-functioning ASD and to age- and sex-matched typically developing controls and recorded their brain activities using functional magnetic resonance imaging (fMRI). Result Regional analysis revealed reduced activation of several brain regions in the ASD group compared with controls in response to dynamic versus static facial expressions, including the middle temporal gyrus (MTG), fusiform gyrus, amygdala, medial prefrontal cortex, and inferior frontal gyrus (IFG). Dynamic causal modeling analyses revealed that bi-directional effective connectivity involving the primary visual cortex–MTG–IFG circuit was enhanced in response to dynamic as compared with static facial expressions in the control group. Group comparisons revealed that all these modulatory effects were weaker in the ASD group than in the control group. Conclusions These results suggest that weak activity and connectivity of the social brain network underlie the impairment in social interaction involving dynamic facial expressions in individuals with ASD.
自闭症患者面部信息加工的研究简述
The Processing of Facial Information in Autism Spectrum Disorders: A Brief Review of Behavioral and Neuroimaging Studies
 [PDF]

郑苗
Advances in Psychology (AP) , 2014, DOI: 10.12677/AP.2014.47125
Abstract:
社会无能作为自闭症的一个显著特征,对面部信息加工存在困难是造成自闭症社会交往障碍的一个重要原因。行为实验发现,自闭症儿童与同等智力的正常儿童相比,其面孔识别测验的得分更低;自闭症患者观看关于社会交往的视频,更多注意人的嘴部或无关物品。fMRI研究中,发现自闭症患者的杏仁核(AMY),颞下沟(STS),梭状回(FFG)等脑区与其面部信息加工困难有关,这为自闭症的异常行为研究提供了神经生理基础。
Social disability is a significant characteristic of autism. And facial information processing difficulty is an important cause of autism social communication disorders. In behavioral experiments, the score of the face cognition test of the autism children is lower compared with normal children of the same intelligence. When autism was watching video on social interaction, they paid more attention to person’s mouth or irrelevant items. In fMRI studies it’s showed that amygdala (AMY), super temporal sulcus (STS), fusiform gyrus (FFG) and related brain regions are responsible for the difficulties of facial information processing in autism. These studies provide the evidence of the abnormal behavior of autism in neural physiological basis.
Visual Word Form Area and Its Functional Role in the Neural Network of Reading
大脑视觉词形区及其在阅读神经网络中的作用

WANG Xiao-Juan,SHU Hua,YANG Jian-Feng,
王小娟
,舒华,杨剑峰

心理科学进展 , 2010,
Abstract: The middle fusiform gyrus was regarded as visual word form areas (VWFA).This view was challenged by more and more evidence recently.An increasing number of researchers are interested in the function of VWFA and the role in visual words reading.They view it as a part of dynamic network.This issue has been investigated quite intensively in recent years,which includes three controversial points reviewed in this paper:the selective sensitivity of VWFA to orthographic stimuli and the hierarchical organization of...
Classical fusiform excision of melanocytic nevi: our experience
Iffat Hassan,Shazia Jeelani,Abid Keen,Mashkoor Wani
Our Dermatology Online , 2013,
Abstract: Introduction: Facial melanocytic nevi whether acquired or congenital may pose an aesthetic problem for many patients, especially women. There are many methods of removal of melanocytic nevi including surgical and non-surgical. However, surgical excision by classical fusiform excision remains the most widely used and one of the best methods taking all perspectives into consideration.Aim: To evaluate efficacy of classical fusiform excision for the removal of facial melanocytic nevi.Methods: In a prospective study, 55 facial melanocytic nevi were removed by fusiform excision technique. Incision was given around the nevus in an elliptical pattern, three times as long as it was wide and along the relaxed skin tension lines. Dissection was carried down to mid-subcutaneous tissue to remove the nevus down to its full depth. Wound was closed by simple interrupted sutures using 5-0 prolene with adequate undermining of the wound edges. Sutures were removed on 7th postoperative day.Results: Complete removal of nevi was achieved in all patients with good to excellent cosmetic results. The scar mark if any, would fade in 3-4 months and were imperceptible in 6-9 months.Conclusions: Fusiform excision is one of the best, most widely used and time-tested procedure for complete surgical excision of melanocytic nevi.
Investigating paranormal phenomena: Functional brain imaging of telepathy
Venkatasubramanian Ganesan,Jayakumar Peruvumba,Nagendra Hongasandra,Nagaraja Dindagur
International Journal of Yoga , 2008,
Abstract: Aim: "Telepathy" is defined as "the communication of impressions of any kind from one mind to another, independently of the recognized channels of sense". Meta-analyses of "ganzfield" studies as well as "card-guessing task" studies provide compelling evidence for the existence of telepathic phenomena. The aim of this study was to elucidate the neural basis of telepathy by examining an individual with this special ability. Materials and Methods: Using functional MRI, we examined a famous "mentalist" while he was performing a telepathic task in a 1.5 T scanner. A matched control subject without this special ability was also examined under similar conditions. Results: The mentalist demonstrated significant activation of the right parahippocampal gyrus after successful performance of a telepathic task. The comparison subject, who did not show any telepathic ability, demonstrated significant activation of the left inferior frontal gyrus. Conclusions: The findings of this study are suggestive of a limbic basis for telepathy and warrant further systematic research.
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