Right medial temporal lobe structures particularly impact early stages of affective picture processing

Mielke M, Reisch LM, Mehlmann A, Schindler S, Bien C, Kißler J (2021)
Human Brain Mapping .

Zeitschriftenaufsatz | E-Veröff. vor dem Druck | Englisch
 
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Abstract / Bemerkung
Human vision prioritizes emotional stimuli. This is reflected in stronger electrocortical activation in response to emotional than neutral stimuli, measurable on the surface of the head. Feedback projections from brain structures deep within the medial temporal lobes (mTLs), in particular the amygdala, are thought to give rise to this phenomenon, although causal evidence is rare. Given the many pathways involved in visual processing, the influence of mTL structures could be restricted to specific time windows. Therefore, we delineate the temporal dynamics of the impact of right mTL structures on affective picture processing, investigating event-related potentials (ERPs) in 19 patients (10 female) with right mTL resections and 19 individually matched healthy participants, while they viewed negative and neutral scenes. Groups differed significantly at early- and mid-latency processing stages. Patients with right mTL resection, unlike controls, showed no (P1: 90-140ms) or marginal (N1: 170-220ms) emotion modulation. At mid-latency (early posterior negativity: 220-370ms), emotion modulation over the ipsi-resectional right hemisphere was smaller in patients than in controls, but groups did not differ over the left hemisphere. During late parietal positivities (400-650ms and 650-900ms), both groups had similar emotion modulation. Our results demonstrate that right mTL structures attenuate particularly early processing of affectively negative scenes. This is theoretically consistent with an initial amygdala-dependent feedforward sweep in visual emotion processing whose absence is successively compensated. Findings specify the impact of right mTL structures on emotional picture processing and highlight the value of time-resolved measures in affective neuroscience. © 2021 The Authors. Human Brain Mapping published by Wiley Periodicals LLC.
Erscheinungsjahr
2021
Zeitschriftentitel
Human Brain Mapping
eISSN
1097-0193
Page URI
https://pub.uni-bielefeld.de/record/2958715

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Mielke M, Reisch LM, Mehlmann A, Schindler S, Bien C, Kißler J. Right medial temporal lobe structures particularly impact early stages of affective picture processing. Human Brain Mapping . 2021.
Mielke, M., Reisch, L. M., Mehlmann, A., Schindler, S., Bien, C., & Kißler, J. (2021). Right medial temporal lobe structures particularly impact early stages of affective picture processing. Human Brain Mapping . https://doi.org/10.1002/hbm.25687
Mielke, M., Reisch, L. M., Mehlmann, A., Schindler, S., Bien, C., and Kißler, J. (2021). Right medial temporal lobe structures particularly impact early stages of affective picture processing. Human Brain Mapping .
Mielke, M., et al., 2021. Right medial temporal lobe structures particularly impact early stages of affective picture processing. Human Brain Mapping .
M. Mielke, et al., “Right medial temporal lobe structures particularly impact early stages of affective picture processing”, Human Brain Mapping , 2021.
Mielke, M., Reisch, L.M., Mehlmann, A., Schindler, S., Bien, C., Kißler, J.: Right medial temporal lobe structures particularly impact early stages of affective picture processing. Human Brain Mapping . (2021).
Mielke, Malena, Reisch, Lea Marie, Mehlmann, Alexandra, Schindler, Sebastian, Bien, Christian, and Kißler, Johanna. “Right medial temporal lobe structures particularly impact early stages of affective picture processing”. Human Brain Mapping (2021).

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