Press "Enter" to skip to content

Stimulating the damaged brain | Steven Laureys | TEDxUNamur


I remember the way he looked at me like

you’re looking at me right now but

strangely different and when we were

examining him with the coma recovery

scale which is a scale we use in people

who had a coma and what we’re trying to

find out whether there is any recovery

of consciousness which for example move

a mirror in front of his eyes but he

will never follow and the physicians who

sent him to us initially thought he was

in a persistent vegetative state I don’t

like that term I don’t think we can

compare humans with vegetables plans so

it’s chairman of the European task force

well we’ve proposed to refer to them as

being in an unresponsive wakefulness

because that’s what we see there after

their coma awakening meaning they open

their eyes with their own responsive

they will never respond to a simple

question they will show no oriented

responses and even if with the team at

the University Hospital in yet we’ve

seen many hundreds of people like him

it’s still for some of them a real

challenge and I remember wondering is

there anybody in there and the story I

would like to share today with you is

the one of a man named loris and he

agreed that I would tell you historian

so that his parents who actually

encouraged me to tell what happens he

was at a party with his girlfriend and

two of his friends and they had quite a

lot of drinks and

wanted to drive back home but their car

hit the truck and they all died except

for Loras who survived the spirit and

intensive care were initially was

breathing through a machine and then he

started to breathe on his own and he

opened his eyes and he was one of these

patients who were sent to us and yet

from all over Europe actually basically

for two questions and that is is there

any consciousness and the second

question is there anything we can do to

help them so let me share here with you

the brain scans so what we see here is

an MRI looking into his brain and you

see a normal brain with all these

billions of neurons taking a lot of

space and in his case there is an

atrophy the brain really is much smaller

and it’s this black this is fluid taking

the place of what should be brain and

that is caused by that traumatic car

accident but now let’s look inside and

look at the connections in this brain

and again you see in a normal brain it

sits like a tree with all these branches

these connections we call axons and you

see basically the fragility and in his

brain it’s very clear that there is way

less of these branches this is what we

call by fuse external injury it’s it’s

all over the brain and this shock

basically broke these brain connections

and was the reason for him to become

Atos but we still wonder okay there’s a

lot of damage here but would there still

be a functioning brain somehow a

functioning mind and that’s why we do

another test which is called PET CT

where we basically inject radioactive

sugar and your brain is using a

of energy and we can see it here you see

the yellow it’s it’s these neurons using

the sugar and in his case well we see

that there are some parts some islands

in his gray matter also being active so

there seems to be a functioning brain a

functioning mind and we can also try to

access that by using what is called a

brain computer interface so here we look

at the electrical activity of his brain

let’s just look at the from there in red

and you see that when we’re presenting

him with different sounds his brain will

react differently that’s that green part

so yes we’ve answered the first question

he is somehow in there perceiving seeing

feeling even if it calmed communicated

this is what we call a minimally

conscious State and I think it’s very

important to try and answer that first

question whether or not these patients

are conscious because of course many

things change because now we no llores

can perceive emotions with also pain so

we should be very careful we should give

him painkillers make sure he’s

comfortable what I wanted to say is that

here we answered the first question and

that’s is he somehow conscious and yes

he is it’s a condition we now call

minimally conscious and I think it’s

very important because many things

change already we now know that loris

can perceive emotion was also pain so

we’ll make sure he’s comfortable receive

painkillers but we also want to make

sure he gets proper we have we want to

simulate his damaged brain and that can

be a challenge he came from France and

there some parts of the country it’s

very difficult actually to get access to

these rehab centers when I saw him he

was 27 and in the Netherlands that’s too

old to get access to rehab after

traumatic brain injury and I think that

is outrageous we should change that

now everything I’ve been telling you so

far is like clinical routine for us all

the brains

and now I would like to share with you

what might be a potentially new

treatment for these people with severe

traumatic brain injury and that is

called transcranial direct current

stimulation where basically we’re trying

transcranial means it goes through the

skull and the direct current will be

applied for 20 minutes every day you see

the electrodes and we’re trying to

increase the brain function of these

parts here in yellow you see the

electrical fields and of course this

this is a new therapy so so we take this

through the ethics committee and we need

the patient’s to give their informed

consent that they come because they

can’t communicate so is the family who

write down they agree to participate in

this scientific experiment where if you

want to find out that a specific drug or

in this case the electrical stimulation

really helps you need to perform what is

called a placebo controlled randomized

double-blind study whoa that means

placebo controlled you’re going to

compare your treatments often it would

be a drug with a placebo sugar pill in

our case it’s the electrical stimulation

with some fake stimulation just put the

electrodes and the machine pretends it’s

doing something

we’ll do it randomized it means you will

just flip a coin that coin decides where

the patient at this moment receives the

real or the fake stimulation and then

it’s double-blind that means the patient

the family but also the clinician they

done know whether it’s the real or the

fake because you really want to make

sure that if you see some change some

improvement that it’s really caused by

your treatment so Loras enrolled in this

clinical trial put on the machine

stimulate him and

using this coma recovery scale then we

see now he’s answering two simple

questions in this case it would move

your leg and then he starts to vocalize

do this for every day one week then we

stop take the other machine we don’t

know which is the real fake one but the

second time basically there was no

change and of course in medicine we

don’t like anecdotal evidence so we’re

going to do this in many patients we now

have over hundreds that benefited from

this technique and what I show you here

is the result from from that group and

this is being published and in black you

see the the scores going up the patient

is getting better and in gray you see

the fake stimulation basically it’s it’s

not changing so we here think we could

have something that could help patients

with severe brain injury to get better

and then one could bounce a question

well alright but why should we care and

Loras sure he’s still dependent on

others to eat get dressed and we need to

accept that everyone is different there

and we all have our values and some

people might prefer not to live in

certain conditions and I think also as a

medical doctor we should take care of

those very difficult end-of-life

decisions but here for Loras what to me

was maybe the most important is when his

father asked him are you happy and he

gives a huge smile and his science yes

so I think we should care and in Europe

everyday there’s 200 people dying

traumatic brain injury mostly young

adults and there’s even more who

survived their coma and remain severely

disabled for the rest of their lives

like Loras and I think as a society but

also my medical community we’ve been

ignoring this silent epidemic and so

when some including my own colleagues

would say I think you know it’s just a

waste of time and money what you’re

trying to do there I would strongly

disagree and traumatic brain injury can

strike anyone anytime I think we should

care about persons like Loras and

there’s hundreds of him and we should

improve their care pathway and not

ignore these patients with severe

traumatic brain injury and is it worth

it

well I think his story and his smile

definitely for me tells me this so I

want to thank him his parents our team in the ash and all those who do care

Please follow and like us: