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ADHD and Concussion
Mary Alexis Iaccarino, MD
Department of Physical Medicine and Rehabilitation Harvard Medical School
Spaulding Rehabilitation Hospital MassGeneral Hospital for Children Sport Concussion Program
Red Sox Foundation and Massachusetts General Hospital Home Base Program
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Disclosures
Neither I nor my spouse/partner has a relevant financial relationship with a commercial interest
to disclose.
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Sport Concussion Clinic at the
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MGHfC Sport Concussion Program
• Assessment, treatment, and education for athletes recovering from concussion.
• Multi-disciplinary active rehabilitation approach for those with persistent symptoms.
• Guided return-to-play and school
Injured Athlete
Neurology
Physiatry
Neuro-psychology
Physical Therapy
Nursing
Sports Psychology
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Background
• 1.8 to 3.6 million SRC per year
• 2 to 3 concussions per 10,000 player exposures (practice or game)
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Concussion- a transient neurological disturbance resulting from acceleration and deceleration forces to the brain after a blow to the
head or body
Translational (linear) Acceleration
Rotational (angular) Acceleration
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Molecular Pathophysiology • Metabolic • Hemodynamic • Structural • Electrophysiological
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Signs of Concussion
• On field or sideline
– Gait instability
– Blank/vacant/befuddled stare
– Asking repetitive questions
– Slowed speech, responses, command following
– Brief confusion, retrograde amnesia, or post-traumatic amnesia
– Loss of Consciousness*
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Symptoms of Concussion
On the field or sideline
• Headache
• Dizziness
• Nausea
• Feeling mentally foggy
• Feeling in a dream like state
Initial days following injury
• Headache
• Dizziness
• Fatigue
• Feeling slowed down
• Drowsiness
• Difficulty concentrating
• Feeling mentally foggy
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Clinical Recovery
• Professional and college: 1 to 14 days (McCrea, 2005; Proglio 2008)
• On average, high school athletes take longer (Henry et al, 2016)
• Most athletes recovery within 1 month (Henry et al, 2016)
• Time to metabolic recovery is unknown (Collins et al, 2016)
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Treatment is consensus based and evidence informed
Collins et al, Neurosurgery 2016
McCrory et al, J Athl Train 2013
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Time to Recovery
• Professional and college, male athletes:
– Symptom resolution: 5-14 days (McCrea et al 2005)
– Brief balance and cognitive assessment: ~ 7 days (McCrea et al 2005)
– Neurocognitive testing: 7-21days (Iverson et al 2006)
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Factors that may increase recovery time* and modifying factors
Demographic Pre-morbid Injury related Female Sex*
(Covassin et al, 2003)
ADHD* (Nelson et al, 2016)
On-field dizziness (Lau et al, 2011)
> 2 previous concussions*
(Guskiewicz et al, 2003)
Migraine (Heyer et al, 2016)
Post-traumatic migraine (Mihalik et al, 2013)
Age < 18 years* (Field et al, 2003)
Depression/anxiety (Kontos et al, 2012,
Covassin et al, 2014)
Overall symptom burden
(Custer et al, 2016)
Learning Disability (Nelson et al, 2016)
Length of LOC (Erlanger et al, 2003)
(Lovell et al, 1999)
Sleep Disorder (Sufrinko et al, 2016)
Post-traumatic Amnesia (Collins et al, 2003)
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ADHD
• There is a positive association between ADHD and injuries
– fractures
– head injuries
– burns
– poisoning
Mikolajczyk et al, 2014
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ADHD and Concussion
ADHD is an antecedent risk factor for prolonged symptoms after SRC
Biederman et al. J Nerv Mental Dis 2015 203 (11): 213-19
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• Youth with active ADHD are at greater risk for sustaining concussion
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ADHD and Concussion
• ADHD associated with prolonged recovery. (Miller et
al., 2015)
• ADHD associated with greater concussion history. (Alosco 2014)
S
ym
pto
m S
everi
ty
Time Since Injury
Adapted from Collins et al. (2006)
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18.7
13.4
26.4
20.3
26.4
24.1
21.7
15.9
0
5
10
15
20
25
30
Boys Girls
Per
cen
t
Control ADHD onlyADHD plus Learning Difficulties Learning Difficulties and no ADHD
• Those with ADHD only and ADHD plus LD had higher rates of concussion than those with LD only.
• But having both ADHD and LD did not have an additive effect
History of having one or more prior
concussions for boys and girls
Iverson, Wojtowicz, et al. (2016)
Lifetime History of Concussion in High School Students with ADHD and LD
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Neuromuscular Control: The Brain and Body
• Risk of injury to athletes with ADHD might be mediated by:
1. Impairment of motor functions
2. Developmental coordination disorders
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Neurocognition and Musculoskeletal Injury
• Emerging evidence that cognition may impact neuromuscular control
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Am J Sports Med 2016 44: 742
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87 cases of concussion among 75 athletes 58 men; 17 women NCAA Division I football, soccer, hockey, softball, basketball,
wrestling, and volley ball Acute non-contact lower extremity injury within 90 days of
concussion Age, sex, and sport matched controls
OR 2.48
No difference was observed in days to lower extremity injury between groups
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Herman et al. Curr Sports Med Rep. 2015 ; 14(3): 194–199
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• Concussion was associated with
– an increased risk of subsequent injury
– A progressively increased risk of injury
• 0 to <3 months, HR=1.56
• 3 to <6 months, HR=2.78
• 6–12 months, HR=4.07
Nordstrom A, et al. Br J Sports Med 2014
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• 37 Healthy subjects - Neurocognitive testing - Jump Landing Task
Herman and Barth Am J Sports Med 2016 44: 2347-53
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Herman and Barth Am J Sports Med 2016 44: 2347-53
• 31% higher peak vertical ground-reaction force
• 26% higher peak proximal anterior
tibial shear force
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Research Program: Priority areas S
port
s-R
ela
ted
Co
ncu
ssio
n Assessment &
Management
Premorbid Factors
Multiple Concussions
1. Understanding the effects of multiple concussions
2. Improving the methodology for assessing cognitive impairment following concussion
3. Examining the usefulness of baseline, preseason testing
4. Improving exertional testing and return to play protocols
5. Active rehabilitation for athletes slow to recover from concussion
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Early Intervention, Improved Access, Timely Follow-Up