Decreased Resting Perfusion in Precuneus and Posterior Cingulate Cortex Predicts Tinnitus Severity

[PortugalTheMan]

Highlights

• Global cerebral blood flow is reduced in tinnitus.
• Tinnitus severity is negatively correlated with cerebral blood flow globally.

• Tinnitus severity is negatively correlated with cerebral blood flow in the precuneus and posterior cingulate cortex.

• Hearing loss predicted reduced cerebral blood flow in the precuneus in participants without tinnitus.

• The presence or absence of hearing loss did not affect the correlation between tinnitus severity and cerebral blood flow.

Study source
https://www.sciencedirect.com/science/article/pii/S2665945X21000061

 

[PortugalTheMan]

I don't see how tinnitus can change the blood flow in the brain.

I think this lack of blood flow to certain parts of the brain is what causes tinnitus.

At least it's the most logical reason.

Let's wait for more studies. This study gave a new point of view to tinnitus.

 

[tommyd87]

I don't get how blood flow can be related to tinnitus at all.

 

[PortugalTheMan]

I don't get how blood flow can be related to tinnitus at all.

The comparison they made using MRI proved that the lower the blood flow, the more severe the tinnitus.

 

[OptimusPrimed]

Skeptical of this study. She says in the video that you are only aware of it when resting. No lady, I can hear mine 24/7 in noisy environments and quiet environments. Mine is noise-derived. It started after an initial acoustic trauma.

Maybe the brain reduces flow to areas that once received or encoded information from the ear. Trying to maintain efficiency. These are the tinnitus associated areas. Who knows.

 

[tommyd87]

The comparison they made using MRI proved that the lower the blood flow, the more severe the tinnitus.

I get this study now, however it seems on face value that it is only referring to a specific subset of tinnitus and not all kinds of tinnitus. Thus this makes things much clearer.

 

[Piney]

After exercise (increased blood flow) my tinnitus is worse. After coffee (decreased blood flow) my tinnitus is worse for hours. Not sure I believe any of this, but if they have an answer, more power to them.

 

[PortugalTheMan]

I get this study now, however it seems on face value that it is only referring to a specific subset of tinnitus and not all kinds of tinnitus. Thus this makes things much clearer.

And what was the subtype of tinnitus they studied? I can't find it anywhere. But from what I understand it's a derived subtype of hearing loss.

 

[Frédéric]

After exercise (increased blood flow) my tinnitus is worse. After coffee (decreased blood flow) my tinnitus is worse for hours. Not sure I believe any of this, but if they have an answer, more power to them.

Same here after exercise. Coffee has no effect.

 

[Clerkp]

Same here after exercise. Coffee has no effect.

Same.