PTSD-related neuroimaging abnormalities in brain function, structure, and biochemistry.

Area of Science:

• Neuroscience
• Psychiatry
• Psychology

Background:

• Most individuals experience trauma, yet only a small percentage develop posttraumatic stress disorder (PTSD).
• Substantial inter-individual variability exists in PTSD susceptibility, necessitating research into underlying neurobiological mechanisms.
• Existing research highlights a fear learning and memory network involving the prefrontal cortex, hippocampus, and amygdala in PTSD pathology.

Purpose of the Study:

• To review current research on neurobiological alterations associated with PTSD.
• To identify gaps in understanding the neural processes underlying PTSD development.
• To propose a framework for developing a comprehensive neurobiological model of PTSD.

Main Methods:

• Review of prior research on brain function, structure, and biochemistry in PTSD.
• Discussion of neuroimaging studies and investigations into acute stress effects.
• Synthesis of findings to inform future research directions.

Main Results:

• Alterations in the function, structure, and biochemistry of the fear network are linked to PTSD.
• Significant gaps remain in understanding the precise neural mechanisms of PTSD development.
• Multimodal neuroimaging and acute stress research are crucial for advancing the field.

Conclusions:

• A comprehensive neurobiological model of PTSD is needed.
• Future research should focus on multimodal neuroimaging and acute stress responses.
• Improved understanding of PTSD neurobiology can lead to better diagnostics and treatments.