scholarly journals Decoding concepts for famous people from BOLD responses in the left anterior temporal lobe

2012 ◽  
Vol 12 (9) ◽  
pp. 178-178
Author(s):  
J. Dubois ◽  
R. Adolphs ◽  
C. Koch
Keyword(s):  
Temporal Lobe ◽  
Anterior Temporal Lobe ◽  
Famous People ◽  
Bold Responses

scholarly journals Beta modulation reflects name retrieval in the human anterior temporal lobe: an intracranial recording study

2016 ◽  
Vol 115 (6) ◽  
pp. 3052-3061 ◽  
Author(s):  
Taylor J. Abel ◽  
Ariane E. Rhone ◽  
Kirill V. Nourski ◽  
Timothy K. Ando ◽  
Hiroyuki Oya ◽  
...  
Keyword(s):  
Temporal Lobe ◽  
Beta Band ◽  
Anterior Temporal Lobe ◽  
Famous People ◽  
Human Ability ◽  
Neurosurgical Patients ◽  
Focus Localization ◽  
Left And Right ◽  
Intracranial Recording ◽  
Name Retrieval

Naming people, places, and things is a fundamental human ability that is often impaired in patients with language-dominant anterior temporal lobe (ATL) dysfunction or ATL resection as part of epilepsy treatment. Convergent lines of evidence point to the importance of the ATL in name retrieval. The physiologic mechanisms that mediate name retrieval in the ATL, however, are not well understood. The purpose of this study was to characterize the electrophysiologic responses of the human ATL during overt cued naming of famous people and objects. Eight neurosurgical patients with suspected temporal lobe epilepsy who underwent implantation of intracranial electrodes for seizure focus localization were the subjects of this study. Specialized coverage of the ATL was achieved in each subject. The subjects named pictures of U.S. presidents and images of common hand-held tools. Event-related band power was measured for each ATL recording site. Both the left and right ATL demonstrated robust and focal increases in beta-band (14–30 Hz) power during person and tool naming. The onset of this response typically occurred at 400 ms but sometimes as early as 200 ms. Visual naming of famous people and tools is associated with robust and localized modulation of the beta band in both the left and right ATL. Measurement of visual naming responses may provide the groundwork for future mapping modalities to localize eloquent cortex in the ATL.

scholarly journals Cerebral trauma-induced dyschromatopsia in the left hemifield: case presentation

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Yoko Mase ◽  
Yoshitsugu Matsui ◽  
Eriko Uchiyama ◽  
Hisashi Matsubara ◽  
Masahiko Sugimoto ◽  
...  
Keyword(s):  
Visual Field ◽  
Color Vision ◽  
Temporal Lobe ◽  
Fusiform Gyrus ◽  
Ganglion Cell Complex ◽  
Automated Perimetry ◽  
Subjective Symptoms ◽  
Anterior Temporal Lobe ◽  
Case Presentation ◽  
Cerebral Trauma

Abstract Background Acquired color anomalies caused by cerebral trauma are classified as either achromatopsias or dyschromatopsias (Zeki, Brain 113:1721–1777, 1990). The three main brain regions stimulated by color are V1, the lingual gyrus, which was designated as human V4 (hV4), and the fusiform gyrus, designated as V4α. (Zeki, Brain 113:1721–1777, 1990). An acquired cerebral color anomaly is often accompanied by visual field loss (hemi- and quadrantanopia), facial agnosia, prosopagnosia, visual agnosia, and anosognosia depending on the underlying pathology (Bartels and Zeki, Eur J Neurosci 12:172–193, 2000), (Meadows, Brain 97:615–632, 1974), (Pearman et al., Ann Neurol 5:253–261, 1979). The purpose of this study was to determine the characteristics of a patient who developed dyschromatopsia following a traumatic injury to her brain. Case presentation The patient was a 24-year-old woman who had a contusion to her right anterior temporal lobe. After the injury, she noticed color distortion and that blue objects appeared green in the left half of the visual field. Although conventional color vision tests did not detect any color vision abnormalities, short wavelength automated perimetry (SWAP) showed a decrease in sensitivity consistent with a left hemi-dyschromatopsia. Magnetic resonance imaging (MRI) detected abnormalities in the right fusiform gyrus, a part of the anterior temporal lobe. At follow-up 14 months later, subjective symptoms had disappeared, but the SWAP abnormalities persisted and a thinning of the sectorial ganglion cell complex (GCC) was detected. Conclusion The results indicate that although the subjective symptoms resolved early, a reduced sensitivity of SWAP remained and the optical coherence tomography (OCT) showed GCC thinning. We conclude that local abnormalities in the anterior section of fusiform gyrus can cause mild cerebral dyschromatopsia without other symptoms. These findings indicate that it is important to listen to the symptoms of the patient and perform appropriate tests including the SWAP and OCT at the early stage to objectively prove the presence of acquired cerebral color anomaly.

Spatial distribution of BOLD responses in mesial temporal lobe epilepsy: an EEG-fMRI study

NeuroImage ◽  
2009 ◽  
Vol 47 ◽  
pp. S196
Author(s):  
MS Sercheli ◽  
E Bilevicius ◽  
H Ozelo ◽  
A Alessio ◽  
FRS Pereira ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Temporal Lobe Epilepsy ◽  
Temporal Lobe ◽  
Mesial Temporal Lobe Epilepsy ◽  
Fmri Study ◽  
Bold Responses ◽  
Mesial Temporal Lobe

scholarly journals Pre-Surgical Mood Predicts Memory Decline after Anterior Temporal Lobe Resection for Epilepsy

2011 ◽  
Vol 26 (8) ◽  
pp. 739-745 ◽  
Author(s):  
R. M. Busch ◽  
M. F. Dulay ◽  
K. H. Kim ◽  
J. S. Chapin ◽  
L. Jehi ◽  
...  
Keyword(s):  
Temporal Lobe ◽  
Anterior Temporal Lobe ◽  
Memory Decline ◽  
Temporal Lobe Resection

scholarly journals Decoding the Formation of New Semantics: MVPA Investigation of Rapid Neocortical Plasticity during Associative Encoding through Fast Mapping

2015 ◽  
Vol 2015 ◽  
pp. 1-17 ◽  
Author(s):  
Tali Atir-Sharon ◽  
Asaf Gilboa ◽  
Hananel Hazan ◽  
Ester Koilis ◽  
Larry M. Manevitz
Keyword(s):  
Temporal Lobe ◽  
Conceptual Knowledge ◽  
Cortical Plasticity ◽  
Declarative Memory ◽  
Memory Performance ◽  
Activity Patterns ◽  
Semantic Networks ◽  
Fast Mapping ◽  
Anterior Temporal Lobe ◽  
Novel Associations

Neocortical structures typically only support slow acquisition of declarative memory; however, learning through fast mapping may facilitate rapid learning-induced cortical plasticity and hippocampal-independent integration of novel associations into existing semantic networks. During fast mapping the meaning of new words and concepts is inferred, and durable novel associations are incidentally formed, a process thought to support early childhood’s exuberant learning. The anterior temporal lobe, a cortical semantic memory hub, may critically support such learning. We investigated encoding of semantic associations through fast mapping using fMRI and multivoxel pattern analysis. Subsequent memory performance following fast mapping was more efficiently predicted using anterior temporal lobe than hippocampal voxels, while standard explicit encoding was best predicted by hippocampal activity. Searchlight algorithms revealed additional activity patterns that predicted successful fast mapping semantic learning located in lateral occipitotemporal and parietotemporal neocortex and ventrolateral prefrontal cortex. By contrast, successful explicit encoding could be classified by activity in medial and dorsolateral prefrontal and parahippocampal cortices. We propose that fast mapping promotes incidental rapid integration of new associations into existing neocortical semantic networks by activating related, nonoverlapping conceptual knowledge. In healthy adults, this is better captured by unique anterior and lateral temporal lobe activity patterns, while hippocampal involvement is less predictive of this kind of learning.

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