Article
Biology
Risa Katayama, Wako Yoshida, Shin Ishii
Summary: This study analyzed the BOLD signal from brain regions during a maze exploration task and found that the parietal and frontal regions play a crucial role in decoding participants' predictions and confidence in upcoming scenes. The study also revealed the interaction between prediction ability and confidence in the prefrontal-parietal network.
COMMUNICATIONS BIOLOGY
(2022)
Article
Neurosciences
Hannah Sheahan, Fabrice Luyckx, Stephanie Nelli, Clemens Teupe, Christopher Summerfield
Summary: The study found that both human brains and recurrent neural networks developed similar neural "number lines" for each context when performing a magnitude comparison task, facilitating the generalization of relational concepts. Neural normalization plays an important role in supporting the transfer of abstract relational knowledge in humans and machine learning systems.
Article
Neurosciences
Sara R. J. Gilissen, Karl Farrow, Vincent Bonin, Lutgarde Arckens
Summary: The posterior parietal cortex (PPC) in mice is proposed to be comprised of at least six subregions, including RL, AM, and MMA. These subregions exhibit different connectivity patterns and receive inputs from different cortical areas, suggesting distinct functions for each. These anatomical findings pave the way for a deeper understanding of how the PPC and its subdivisions contribute to multisensory integration-based behavior in mice.
Article
Behavioral Sciences
Stefano Terruzzi, Damiano Crivelli, Alberto Pisoni, Giulia Mattavelli, Leonor Josefina Romero Lauro, Nadia Bolognini, Giuseppe Vallar
Summary: This study investigated the role of the right posterior parietal cortex (PPC) in Prismatic Adaptation (PA) and Aftereffects (AEs) using low frequency repetitive Transcranial Magnetic Stimulation (rTMS). The results showed that PPC plays a key role in the realignment process, while its impact on recalibration is limited.
Article
Behavioral Sciences
Alexis Cheviet, Laure Pisella, Denis Pelisson
Summary: This study investigated the contribution of the posterior parietal cortex (PPC) to saccadic remapping mechanisms in visual constancy. A patient with a PPC lesion and optic ataxia in the left hemifield was studied in transsaccadic visual localization tasks, showing specific patterns of perceptual deficits. The findings support the crucial role of the PPC in saccadic remapping processes for perceptual visual constancy.
Article
Neurosciences
Youngsun T. Cho, Flora Moujaes, Charles H. Schleifer, Martina Starc, Jie Lisa Ji, Nicole Santamauro, Brendan Adkinson, Antonija Kolobaric, Morgan Flynn, John H. Krystal, John D. Murray, Grega Repovs, Alan Anticevic
Summary: This study investigated how reward and loss impact spatial working memory precision and neural circuits in human subjects. The results showed that both reward and loss improved spatial working memory precision, with specific regions like precentral sulcus and intraparietal sulcus having increased BOLD signal related to better working memory precision. Conversely, areas straddling executive networks displayed decreased BOLD signal during incentivized working memory.
Article
Biology
Rikako Kato, Takuya Hayashi, Kayo Onoe, Masatoshi Yoshida, Hideo Tsukada, Hirotaka Onoe, Tadashi Isa, Takuro Ikeda
Summary: Research using PET imaging reveals altered brain activity in blindsight macaques that lack visual awareness but can still perform visual motor tasks, showing significant changes in activity of the lateral bank of the intraparietal sulcus (lbIPS) bilaterally. Injection of muscimol into this region impairs visuomotor performance, suggesting a role for bilateral lbIPS in visuomotor function in blindsight conditions.
COMMUNICATIONS BIOLOGY
(2021)
Article
Psychology, Multidisciplinary
Hyun Jung Han, Sangil Lee, Wi Hoon Jung
Summary: Motivation plays a critical role in human cognitive function. This study classified individuals' behavioral responses and discovered two distinct groups with different achievement motivation orientations. Structural brain analysis and functional magnetic resonance imaging data revealed neural mechanisms related to achievement motivation.
CURRENT PSYCHOLOGY
(2022)
Article
Neurosciences
Richard W. Morris, Amir Dezfouli, Kristi R. Griffiths, Mike E. Le Pelley, Bernard W. Balleine
Summary: From an associative perspective, encoding specific action-outcome associations is crucial for acquiring new goal-directed actions. Although competitive architectures have been proposed in associative learning theory, it remains unclear how these architectures are implemented by the brain. In this study, we trained human participants to encode various action-outcome associations while undergoing fMRI. We found that degrading one action-outcome contingency selectively reduced performance of the degraded action, and the degradation effect reflected competition between the action and the context for predicting the specific outcome. Our findings suggest that activity in the mPFC and dACC tracks changes in the association of the action and context, respectively, with regard to the specific outcome. Furthermore, the mPFC, striatum, and posterior parietal cortex participate in a network to segregate the influence of competing predictors for establishing specific action-outcome associations.
JOURNAL OF NEUROSCIENCE
(2022)
Article
Anatomy & Morphology
Jan Churan, Andre Kaminiarz, Jakob C. B. Schwenk, Frank Bremmer
Summary: The study found that the lateral intra-parietal area (LIP) of the brain has information about the motion of the saccade target for generating accurate interceptive saccades, but there is a delay in prediction. Selecting neurons with the strongest representation of target motion can reduce this delay to approximately 30 milliseconds.
BRAIN STRUCTURE & FUNCTION
(2021)
Article
Neurosciences
Yang Zhou, Ou Zhu, David J. Freedman
Summary: In this study, reversible pharmacological inactivation of LIP neural activity was used to investigate its role in visual categorical decisions. The results showed that LIP plays a generalized role in these decisions, independent of task structure and motor response modality.
JOURNAL OF NEUROSCIENCE
(2023)
Article
Neurosciences
Nathalie Richard, Michel Desmurget, Achille Teillac, Pierre-Aurelien Beuriat, Lara Bardi, Gino Coude, Alexandru Szathmari, Carmine Mottolese, Angela Sirigu, Bassem Hiba
Summary: The study provides evidence of dense connections between the dorso-posterior parietal cortex (DPPC) and focal sectors within the pre and postcentral gyrus, supporting the existence of a direct sensory-parietal-motor loop suited for fast manual control and rapid integration of distal sensorimotor signals.
Article
Neurosciences
Yingying Wang, Hongmi Lee, Brice A. Kuhl
Summary: Human neuroimaging studies have successfully reconstructed multidimensional and idiosyncratic memory representations using semantic encoding models. The reconstructions were accurate in visual and lateral parietal cortices when viewing scenes and recalling them from memory. The reconstructions matched subjects' verbal descriptions of their memories and the encoding models transferred reliably across subjects.
Article
Neurosciences
Tsz-Fung Woo, Chun-Kit Law, Kin-Hung Ting, Chetwyn C. H. Chan, Nils Kolling, Kei Watanabe, Bolton K. H. Chau
Summary: The study found that the dorsolateral prefrontal cortex (dlPFC) has a causal role in filtering choice-irrelevant information during multiple-option decision making, while the posterior parietal cortex (PPC) has a causal role in value-based spatial selection.
Article
Neurosciences
Jacqueline M. Fulvio, Qing Yu, Bradley R. Postle
Summary: Working memory requires encoding stimulus identity and context. The posterior parietal cortex (PPC) plays a crucial role in controlling the representation of stimulus context in visual working memory (WM), showing sensitivity to context binding requirements and domain.
