How did Gabrielle Giffords survive gunshot wound to head?

Rep Gabrielle Giffords

Rep Gabrielle Giffords

Initial reports on the shooting of American politician, Gabrielle Giffords, at the weekend, implied that she had been shot dead. The fact that she had received a gunshot wound through the back of her head made it seem sadly likely that this was the case. However, Giffords, although in a critical condition has survived the shooting, and her doctors are “cautiously optimistic” about her survival.

While around two-thirds of patients with a gunshot wound to the head don’t live, one-third do (although only 50% of those patients survive longer than 30 days).  Of course long-term neurological function in the survivors is another story.

In Giffords’ case, the bullet shot through the back of the left side of her head. If it had passed through the midline, the likelihood of survival would have been less likely.

According to CNN’s Chief Medical Correspondent Dr. Sanjay Gupta, the injury was a “through and through” injury, meaning there was both an entry and exit wound – meaning  some of the energy of the bullet was dissipated into space, as opposed to all within her cranial cavity.

Dr Gupta also reports that neurosurgeon, Dr. Michael Lemole, performed a craniectomy (surgical removal of a portion of the cranium) to prevent the brain swelling.  By removing portions of the skull, the brain has extra room to swell. Incidentally, the bone that’s removed is saved, and put back in the head during a future operation.

While Giffords is clearly not out of danger yet, let us hope that the signs are good for her recovery.

Weekly Round-Up

 

Eternal Sunshine Of the Spotless Mind

Would you take a pill to erase bad memories?

 

New Year is traditionally a time for many people to make a resolution to give up smoking. The smoking cessation medications bupropion and varenicline may both be associated with changes in the way the brain reacts to smoking cues, making it easier for patients to resist cravings, according to two reports posted online that will appear in the May print issue of Archives of General Psychiatry, one of the JAMA/Archives journals.

If you are a parent of a teen going through puberty you will know all about the hormonal changes they go through.  Now, a Georgia State University scientist has found that those hormones in males may be key to changes in a part of the brain responsible for social behaviors.

It will take some time for those teen brains to develop fully though, as we know now from new research that the brain continues to develop after childhood and puberty, and is not fully developed until people are well into their 30s and 40s. The findings contradict current theories that the brain matures much earlier.

And still on the subject of teenagers, PBS science correspondent, Miles O’Brien looks at what could be happening to teenage brains as they develop in a rapid-fire world of technology and gadgets.

Finally, if you have ever watched the 2004 movie Eternal Sunshine of the Spotless Mind, you will have seen the fictional characters played by Jim Carrey and Kate Winslet use a technique to erase memories of each other when their relationship turns sour. It will have seemed an unreal expectation that we could erase memories so easily, but new research on “erasing” traumatic memories is quickly moving from the realm of science fiction to scientifically backed reality.

Introducing a new feature today – a weekly round-up of the best of the neuroscience news and views and latest research which has caught my attention.

Neuroplasticity

It used to be established dogma in scientific circles that our brains were fixed entities and did not change after growth in infancy. Since the 1970s we know this to be untrue and that in fact, the human brain is malleable and can change in response to new experiences,  stimulation or damage.

We call this ability to change the brain neuroplasticity – the term is derived from neuron (the nerve cells in our brain) and plastic (capable of being moulded).