Evidence
Cerebellum. 2024 Aug 24. doi: 10.1007/s12311-024-01731-9. Online ahead of print.
ABSTRACT
Post-traumatic stress disorder (PTSD) is a debilitating mental health condition characterized by recurrent re-experiencing of traumatic events. Despite increasing evidence suggesting that the cerebellum is involved in PTSD pathophysiology, it remains unclear whether this involvement is related to symptoms directly resulting from previous trauma exposure, such as involuntary re-experiencing of the traumatic events, or reflects a broader cerebellar engagement in negative affective states. In this study, we investigated the specific role of the cerebellum in PTSD by employing a script reactivation paradigm with personalized traumatic and sad autobiographical memories in 28 individuals diagnosed with chronic PTSD. Functional magnetic resonance imaging (fMRI) data were collected while participants listened to their own autobiographical narratives recounted by a third person. Activation in the right cerebellar lobule VI was uniquely associated with traumatic autobiographical recall and was parametrically modulated by the severity of re-experiencing symptoms. In contrast, cerebellar Crus II showed increased activation during both traumatic and sad autobiographical recall, suggesting a broader involvement in processing negative emotions. Our findings highlight the unique contribution of the right cerebellar lobule VI in the processing of traumatic autobiographical memories, potentially through its engagement in low-level representation of sensory and emotional aspects of traumatic events.
PMID:39180693 | DOI:10.1007/s12311-024-01731-9
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