Structural Connectivity between Olfactory Tubercle and Ventrolateral Periaqueductal Gray Implicated in Human Feeding
Guangyu Zhou1, Gregory Lane2, Thorsten Kahnt3
1Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611 guangyu.zhou@northwestern.edu c-zelano@northwestern.edu.
Summary
The olfactory tubercle (TUB) and periaqueductal gray (PAG) show a unique structural link. This pathway
Area of Science:
- Neuroscience
- Neuroanatomy
- Behavioral Science
Background:
- The olfactory tubercle (TUB) is a key part of the ventral striatum, involved in reward and feeding behavior.
- Research has primarily focused on the nucleus accumbens, leaving the TUB's role in feeding understudied.
- Olfactory input is crucial for motivated feeding, yet TUB structure and connectivity in humans are poorly understood.
Purpose of the Study:
- To analyze macrostructural variations of the TUB in relation to the whole brain.
- To investigate the relationship between TUB structural pathways and feeding behavior, using BMI as a proxy.
- To explore the TUB's understudied role in human feeding regulation.
Main Methods:
- Structural covariance analysis of the olfactory tubercle (TUB) and whole brain data.
- Exploration of correlations between TUB white matter tract integrity and body mass index (BMI).
- Utilized neuroimaging techniques to analyze macrostructural variations and connectivity.
Main Results:
- Identified a unique structural covariance between the olfactory tubercle (TUB) and the periaqueductal gray (PAG).
- The white matter tract integrity between the TUB and PAG was negatively correlated with BMI.
- This suggests a potential link between the TUB-PAG pathway and feeding behavior regulation.
Conclusions:
- The olfactory tubercle (TUB)-periaqueductal gray (PAG) pathway plays a potential role in regulating human feeding behavior.
- Structural integrity of the TUB-PAG pathway may influence body mass index (BMI).
- Further research into the TUB's function in feeding behavior is warranted.
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