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Controlled Cortical Impact Model for Traumatic Brain Injury
Published on: August 5, 2014
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Repeat traumatic brain injury exacerbates acute thalamic hyperconnectivity in humans
Rebecca E Woodrow1,2, David K Menon1,3, Emmanuel A Stamatakis1
1University Division of Anaesthesia, University of Cambridge, Cambridge CB2 0SP, UK.
Brain Communications
|July 11, 2024
Summary
Repeated mild traumatic brain injury (mTBI) can lead to cumulative neurological effects. Even two prior injuries may create a vulnerable neural environment of exacerbated hyperconnectivity, impacting brain function.
Area of Science:
- Neuroscience
- Neurology
- Radiology
Background:
- Repeated mild traumatic brain injury (mTBI) poses risks to public and sporting safety.
- Cumulative neurological effects from repeated mTBI are more significant than single injuries.
- Mechanistic studies of repeated mTBI have primarily used animal models.
Purpose of the Study:
- To compare the acute neurological effects of repeated mTBI versus single mTBI.
- To investigate thalamic functional connectivity as a marker for mTBI outcomes.
- To explore the neural substrates of cumulative effects from mTBI.
Main Methods:
- Utilized resting-state functional MRI (fMRI) in human participants.
- Quantified thalamocortical functional connectivity.
- Compared groups with repeated mTBI (n=21), single mTBI (n=21), and healthy controls (n=76).
Main Results:
- A trend of increasing thalamocortical functional connectivity with the number of injuries was observed.
- This trend was evident at both local and global scales.
- Individuals with a history of two prior injuries showed exacerbated hyperconnectivity.
Conclusions:
- A history of even two mTBIs can induce a vulnerable neural environment characterized by hyperconnectivity.
- Thalamocortical functional connectivity serves as a scalable marker for acute mTBI.
- This marker can indicate long-term neural dysfunction following mild traumatic brain injury.
