Evidence for modulation of opioidergic activity in central vestibular processing: A [(18)F] diprenorphine PET study.
Hum Brain Mapp
; 31(4): 550-5, 2010 Apr.
Article
in En
| MEDLINE
| ID: mdl-19780041
Animal and functional imaging studies had identified cortical structures such as the parieto-insular vestibular cortex, the retro-insular cortex, or the anterior cingulate cortex belonging to a vestibular cortical network. Basic animal studies revealed that endorphins might be important transmitters involved in cerebral vestibular processing. The aim of the present study was therefore to analyse whether the opioid system is involved in vestibular neurotransmission of humans or not. Changes in opioid receptor availability during caloric air stimulation of the right ear were studied with [(18)F] Fluoroethyl-diprenorphine ([(18)F]FEDPN) PET scans in 10 right-handed healthy volunteers and compared to a control condition. Decrease in receptor availability to [(18)F]FEDPN during vestibular stimulation in comparison to the control condition was significant at the right posterior insular cortex and the postcentral region indicating more endogenous opioidergic binding in these regions during stimulation. These data give evidence that the opioidergic system plays a role in the right hemispheric dominance of the vestibular cortical system in right-handers.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Brain
/
Vertigo
/
Vestibule, Labyrinth
/
Receptors, Opioid
/
Dizziness
Type of study:
Clinical_trials
Limits:
Adult
/
Humans
/
Male
Language:
En
Journal:
Hum Brain Mapp
Journal subject:
CEREBRO
Year:
2010
Document type:
Article
Affiliation country:
Germany
Country of publication:
United States