Browsing by Author "Erdoğan, Yiğit"

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Citation - WoS: 1
Gradual Loss of Social Group Support During Competition Activates Anterior Tpj and Insula but Deactivates Default Mode Network
(MDPI, 2023) Özkul, Burcu; Candemir, Cemre; Oğuz, Kaya; Eroğlu-Koç, Seda; Kizilates-Evin, Gozde; Ugurlu, Onur; Erdoğan, Yiğit
Group forming behaviors are common in many species to overcome environmental challenges. In humans, bonding, trust, group norms, and a shared past increase consolidation of social groups. Being a part of a social group increases resilience to mental stress; conversely, its loss increases vulnerability to depression. However, our knowledge on how social group support affects brain functions is limited. This study observed that default mode network (DMN) activity reduced with the loss of social group support from real-life friends in a challenging social competition. The loss of support induced anterior temporoparietal activity followed by anterior insula and the dorsal attentional network activity. Being a part of a social group and having support provides an environment for high cognitive functioning of the DMN, while the loss of group support acts as a threat signal and activates the anterior temporoparietal junction (TPJ) and insula regions of salience and attentional networks for individual survival.
Citation - WoS: 2
Citation - Scopus: 2
The Reflection of Self-Esteem on the Brain Structure: a Voxel Based Morphometry Study in Healthy Young Adults
(Turkish Neuropsychiatry Assoc-Turk Noropsikiyatri Dernegi, 2023) Erata, Mehmet C.; Eroğlu, Seda; Özkul, Burcu; Uslu, Özgül; Erdoğan, Yiğit; Kitiş, Ömer; Gönül, Ali Saffet
Introduction: Low self-esteem is a known risk factor for mental illnesses. Neuroimaging studies have identified evidence for a functional association between default mode network (DMN) and self-esteem levels. However, it is not clear whether there is a similar association between trait self-esteem and the structures composing DMN. This study aimed to investigate the relationship between the DMN associated brain structures and trait self-esteem. Methods: We obtained 3T structural magnetic resonance imaging (MRI) data of 75 healthy subjects and detected anatomical regions correlated with their Rosenberg Self-Esteem scores via voxel-based morphometry (VBM). Results: We found positive associations between self-esteem and regional grey matter volumes in the right temporoparietal junction/ inferior parietal lobule (BA 39), cortical midline regions at precuneus/ dorsal cingulate cortex (BA 31), rostral and dorsal anterior cingulate cortices (BA 32). Conclusion: The results of the current study support the fMRI studies suggesting self-esteem levels associated with DMN. Further neuroimaging studies should consider the functional and structural coupling of the default mode network during the execution of the functions related to self-esteem.