Friday, April 19, 2024

Repeated concussions can thicken skull, study finds

(Monash University) – New research has found that repeated concussions can thicken the structure of skull bones. Previous studies have shown damage to the brain following concussion, but have not looked at the brain’s protective covering.

A study published in the journal Scientific Reports by associate professor Bridgette Semple from Monash University’s Central Clinical School Department of Neuroscience found that repeated concussions resulted in thicker, denser bones in the skull.

It is unclear whether this thickening of the skull is a good thing or a bad thing. In theory, a thicker skull is a stronger skull, suggesting that this may be the bone’s attempt to protect the brain from subsequent impacts.

“This is a bit of a conundrum,” Semple said. “As we know, repeated concussions can have negative consequences for brain structure and function. Regardless, concussion is never a good thing.”

The team hopes that the microstructural skull alterations caused by concussion will be considered by researchers in the field to better understand how concussions affect the whole body.

Concussion is a form of traumatic brain injury, and repeated concussions have been linked to long-term neurological harm.

Most studies focus on understanding how these head injuries affect the brain and its function – but they largely ignore the overlying skull bones that protect the brain.

Although bones are considered a mostly structural component of the human body, they are in fact active living tissues that can respond to applied mechanical forces.

Study collaborator professor Melinda Fitzgerald, from Curtin University and the Perron Institute in Western Australia, has previously shown that repeated concussive impacts lead to subtle problems with memory, and evidence of brain damage.

In this new study, high-resolution neuroimaging and tissue staining techniques were used in a pre-clinical model, and revealed an increase in bone thickness and density, in close proximity to the site of injury.

Future studies are planned, with collaborator and bone expert professor Natalie Sims from St Vincent’s Institute of Medical Research in Melbourne, to understand if a thickened skull resulting from repeated concussions alters the transmission of impact force through the skull and into the vulnerable brain tissue underneath.

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