Concussions Flashcards

1
Q

what is a concussion?

A

a biomechanical force transmitted to the head (direct or indirect) that causes chemical changes in the brain

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2
Q

does a concussion result in an extended period of unconsciousness, amnesia, or other significant neurologic signs of severe brain injury generally?

A

nope

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3
Q

in more severe concussions, the mechanical force of the blow to the head can cause what?

A

stretching and permanent damage to the brain cells

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4
Q

t/f: though often referred to as a mild TBI, the effects of a concussion can be serious and life altering

A

true

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5
Q

what concussion population will tend to minimize their symptoms and pain?

A

service men and women

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6
Q

if a concussion pt is a service man or woman, what should we ask them?

A

if they were deployed, when they were deployed, and if they have been exposed to glass bc of risk for coup and contracoup injury

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7
Q

T/f: mTBI is primarily a fxnal injury of the CNS due to metabolic dysfxn, NT disturbance, and microstructural changes

A

true

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8
Q

does mTBI involve large structural brain changes?

A

nope, the changes are fxnal and maybe microstructural

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9
Q

does a TBI or mTBI involve structural brain changes?

A

TBI

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10
Q

what are microstructural changes?

A

changes at the cellular and axonal level

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11
Q

what is the typical GCS for a concussion pt?

A

13-15 (high fxning)

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12
Q

what must we ask about in concussion to help inform the prognosis?

A

the MOI

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13
Q

why is knowing the MOI of a concussion important in determining the prognosis?

A

bc some MOIs are more serious than others

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14
Q

t/f: a coup-contracoup injury involves linear forces

A

true

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15
Q

what are the general 3 MOIs of concussion?

A

coup-contracoup injury
rotational injury
stretching/shearing of axons

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16
Q

what MOI of concussion predicts the worst prognosis?

A

rotational injury

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17
Q

is linear or rotational MOI a better indicator of traumatic injury?

A

rotational

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18
Q

the worst concussion injuries occur with ____ injuries

A

rotational

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19
Q

how much G force is produced in a concussion? in a football impact?

A

concussion=100G
football impact=150G
(for reference, 3G of a space shuttle are considered significant forces and walking produces just 1 G)

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20
Q

does concussion generally cause temporary or permanent alteration of central regulatory systems?

A

temporary

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21
Q

what happens initially following any brain injury?

A

temporary alteration of central regulatory systems bc the brain shuts down for a quick second

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22
Q

what happens following the temporary alteration of central regulatory systems in a concussion?

A

rapid dynamic changes in NTs, ions, glucose metabolism, and cerebral blood flow

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23
Q

following a concussion, does blood flow increase or decrease? does brain energy demand increase or decrease?

A

blood flow decreased, but energy demand increases

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24
Q

what is the traumatic metabolic cascade?

A

the rapid dynamic changes in the brain that occur following a concussion

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25
t/f: sx becomes clearer in concussion as the days go on
true
26
would traditional brain scans see abnormalities in a pt with a concussion?
nope, but blood flow scans would
27
what do advanced neuroimaging studies show post concussion?
reduced fMRI activation in depressed pts gray matter loss brain blood flow loss on CT scan
28
t/f: concussion results in disturbed cerebral autoregulation
true
29
what is the result of disturbed cerebral autoregulation (changes in ANS and CO2 regulation)?
lack of response to changes in SBP
30
t/f: all individuals with concussion seek medical care
false
31
do more male or female athletes sustain concussions every year?
more female athletes
32
are concussions more prevalent in sports, or non-sports populations?
non-sports populations
33
what is a common cause of concussion in older populations?
falls
34
what are common non-sport causes of concussion?
falls, MVA< high impact collisions, blunt trauma, blast/military, assault
35
what is the best way to differentiate concussion vs post concussive syndrome (PCS)?
by length of time to recovery
36
what is the typical timeline of recovery for concussion?
days to weeks
37
although there is no clear definition of PCS, it is generally defined as sx that persist for how long?
>3 months
38
what is the typical timeline of recovery in PCS?
weeks to months
39
dx of concussion/PCS requires how many of the mTBI sx to be present?
3 or more
40
what is second impact syndrome?
when a person sustains a 2nd concussion b4 complete healing of the initial concussion (RARE)
41
what is the problem with second impact syndrome?
the additional rapid swelling of brain tissue after the initial impact causes significant edema that puts pressure on the BS and can cause unconsciousness and resp failure
42
what are the s/s of second impact syndrome?
dilated pupils loss of eye movt unconsciousness resp failure death (within 2-5 min)
43
what are the diagnostic criteria for a concussion dx? (don't think we need to know these?)
Any period of decreased orientation/loss of consciousness Posttraumatic amnesia Alteration in cognition or mental status (confusion, disorientation, slowed thinking, probs with attention/concentration, forgetfulness) Physical sx: HA, dizziness, balance disorders, nausea, vomiting, fatigue, sleep disturbance, blurred vision, sensitivity to light, hearing difficulties, tinnitus, sensitivity to noise, seizure, transient neuro abnormalities, numbness, tingling, neck pain, exertional intolerance. Emotional/behavioral sx: depression, anxiety, agitation, irritability, impulsivity, aggression GCS 13-15 Normal brain imaging (traditional imaging, blood flowing imaging would be abnormal) s/s not otherwise explained by drug, alcohol, or meds Sx present that cannot be explained by preinjury hx of medical dx. If preinjury dx were present, the pt reports or is observed to demonstrate an exacerbated state of sx.
44
t/f: the sx, impairments, and fxnal limitations associated with concussion can be easily confused with other common illnesses or injuries
true
45
what are the observed signs of concussion?
Can't recall events b4/after Appears dazed/stunned Forgets an instruction, is confused about an assignment/position, unsure of the game, score, or opponent. Moves clumsily Answers questions slowly (slowed speaking) Loses consciousness (even briefly) Shows mood, behavior, or personality changes HINT will likely be normal
46
what are the reported symptoms of concussion?
HA/pressure in the head Nausea/vomiting Balance problems/dizziness or double/blurry vision Bothered by light/noise Feeling sluggish, hazy, foggy, or groggy Confusion, concentration, or memory problems Just not “feeling right” or “feeling down” (VERY COMMON)
47
what are the 6 clinical trajectories in the UPitt model of concussions?
vestibular oculomotor cognitive post-traumatic migraine cervical anxiety/mood
48
what VOR/central issue do we often see in concussion pts in the oculomotor trajectory?
convergence/divergence issues
49
what are the s/s of concussion pts in the cervical MSK impairment trajectory?
neck pain HA w/ or w/o neck pain dizziness diminished balance or postural control
50
what are the s/s of concussion pts in the vestibulo-occular impairment trajectory?
dizziness balance problems vertigo blurred vision HAs nausea sensitivity to light and sound mental foginess difficulty reading and concentrating anxiety fatigue
51
what would be a typical student presentation for concussion in the vestibulo-oculomotor trajectory?
difficulty with looking from the paper to the board (a convergence/divergence fxn), reading, or lights of the classroom
52
what are the s/s of a pts with concussion in the autonomic dysfxn and exertional impairments trajectory?
increased sx with physical exertion fatigue deconditioning OH
53
what are the s/s of a pt with concussion in the motor fxn impairment trajectory?
static and dynamic balance impairments changes in multitasking impairments delayed motor rxn time increased difficulty with motor coordination tasks
54
what is a typical student presentation of a pt with concussion in the motor fxn impairment trajectory?
hard to concentrate while taking notes and listening to the lecture hard to balance while reading
55
what is the hardest concussion trajectory to assess and treat?
the concussion in the motor fxn impairments trajectory
56
what are the 4 domains of concussion care management that are relevant to PT practice?
cervical MSK impairment vestibulo-oculomotor impairment autonomic dysfxn and exertional impairments motor fxn impairments
57
what factors influence recovery in concussion?
age (younger>older) sex (females>males) hx of concussion ADHD hx of migraines genetics
58
considering predisposing factors, most concussed individuals recover with _____ days without intervention
7-14
59
if most concussed individuals will recover without intervention, why do therapy?
bc PT can improve recovery outcomes and time bc if someone has risk factors for poor recovery, we can intervene early
60
what % of concussed individuals will have sx for >10 days?
10%
61
t/f: although sx, impairments, and fxnal limitations in concussion follow a gradual pattern of improvement, the trajectory may not be linear
true
62
what was the conventional approach to concussion care? why did we do this?
it used to be to encourage rest until sx resolution to alleviate discomfort, reduce energy demands, and reduce catastrophic incidence of 2nd impact syndrome
63
new findings show that what is better than rest for concussed individuals' recovery?
24-48 hours of rest followed by phased activity progression for early, gradual return to activity
64
t/f: early intervention for concussion is safe and may facilitate faster recovery
true
65
do we use graded severity for concussions (is grade 1, 2, 3, etc)?
no, we are moving away from this and towards evaluation fo clinical trajectories of impairment
66
why do we want to ID tests and outcomes that provoke sx in concussion pts?
to ID clusters of sx and limitations for triangulation of subjective and objective outcomes
67
are most concussed individuals one type of dysfxn or multiple types of dysfxn?
multiple types of dysfxn
68
what is involved in concussion management?
immediate removal from the sport and activity medical evaluation physical and cognitive rest 24-48 hours school modifications as needed therapies as needed RTP (return to play)/RTL (return to learning) sideline assessments
69
what are the 3 sideline assessments we can use for concussion?
SCAT5 sideline ImPACT testing concussion symptoms inventory
70
what is involved in impact testing?
verbal memory visual memory processing speed rxn time sx scale demographic hx
71
what is the big limitation of ImPACT testing?
submarining (literally not a clue what this means)
72
what concussion sx are predictors of prolonged recovery?
dizziness at the time of injury HA migraine depressive sx
73
if sx of concussion are worsening over time, is this the typical progression we expect to see?
definitely not
74
what characteristics of concussion sx should we be paying attention to?
the frequency, intensity, type, and irritability of the sx
75
what conditions with concussion would limit/serve as contraindications to PT?
respiratory dysfxn unstable VS personality changes changes in consciousness unstable sx (large swings) (+) sharp purser test of the c spine
76
what questions should we ask about PMH with a concussion pt?
previous concussions ADHD mood disturbances migraine hx
77
what subjective questionnaires can we use at intake to cluster sx?
clinical profile screening tool (UMPC)-CP screening tool post concussion symptoms scale dizziness handicap inventory (DHI) neck disability index (NDI) HA disability index (HDI) ABC
78
what does the clinical profile screening tool (CP screening tool) tell us?
it tells us about the last 24 hours of sx with specific questions to be aligned with specific concussion trajectories so we can classify them
79
when would we want to screen for emergent situations?
GCS<13 pupillary asymmetry, repeated vomiting, seizures severe or rapidly worsening HA or neuro deficits (risk for hemmorhage) undiagnosed skull fx c spine fx or ligamentous instability
80
what is the proposed order of the objective exam for concussion?
cervical spine dizziness/HA motor fxn
81
t/f: we should proceed in our objective concussion exam in order of anticipated least to most irritable tests
true
82
what are the emergent screening items in the cervical MSK exam for concussion?
alar lig testing sharp purser testing
83
what is involved in the cervical MSK exam for concussion?
alar lig testing sharp purser testing cervical AROM manual passive jt mobility trigger point assessment/tenderness to palpation craniocervical flexion testing cervical flexion rotation testing cervical jt position error thoracic spine testing
84
how do we perform a craniocervical flexion test?
use a PBU cuff at 20mmHg have pt activate their deep neck flexors (DNFs) to increase to pressure by 2 mmHg, then 2 more, then 2 more until they can't hold it or start using SCMs
85
how do we perform a cervical flexion rotation test?
have the pt max flex their neck then add rotation in to highlight any tightness
86
what info are we trying to gain from the craniocervical flexion test?
DNF endurance
87
how do we perform the cervical joint position error test?
place a target 90 cm away at the pt's head height and have them align a head laser with the bullseye center of the target with their EC ask them to turn their head one way and then try to realign with the target with eyes still closed measure the distance from the laser to the center do 3 trials in each direction and record the best score
88
what does the cervical joint position error test tell us?
the proprioceptive kinesthetic sense of the neck
89
t/f: the VOMs (vestibulo-ocular motor screen) is a replacement for a robust vestibular and ocular assessment
false
90
what is the VOMs (vestibulo-oculomotor screen)?
a test for 5 areas of self reported sx provocation smooth pursuits, horizontal/vertical saccades, convergence, horizontal/vertical VOR, visual motion sensitivity
91
t/f: the VOMS lacks objective assessment
true
92
what sx does the VOMs track?
HA, dizziness, nausea, and fogginess of the movts (smooth pursuits, saccades, convergence, VOR, visual motion)
93
with the standard ocular exam, we are typically looking to differentiate a central vs peripheral issue, so what is its role in concussion, when we know there is a central issue?
to see what things provoke their sx
94
what is normal convergence?
<6cm
95
what is normal smooth pursuits/saccades distance?
30 deg each direction about 36 inches from the nose
96
would we expect to see vertical eye movts in the cover/uncover test with concussion?
no, bc even though it is a central sign (and concussion is a central issue), this is more indicative of a cerebellar issue
97
t/f: vergence and accomodation (reshaping of the lens with contraction/relaxation) are often dysfxnal in mTBI
true
98
what indicates abnormal performance of visual/vestibular fxn?
hypometric and slowed movts
99
what things are involved in the vestibulo-ocular exam?
cover/uncover test saccadic eye movt vergence accomodation DHT roll test spontaneous nystagmus test HIT head shaking nystagmus DVA gaze evoked nystagmus VOR VOMs VORc
100
what is the king devick test?
saccades, vergence, and accomodation based reading assessment that takes about 3 min to complete mostly as a sideline assessment
101
what is the difference bw reactive saccades and anticipatory saccades?
in reactive saccades, the examiner is cueing the pt when to look from one target to another in anticipatory saccades, the pt looks bw the targets at expected times (told to look bw the targets as quickly as they can)
102
t/f: the king devick test has high specificity and sensitivity to detect concussion
true
103
how can we increase the sensitivity of the kind devick test?
by performing the test after exertional testing
104
t/f: cerebellar connections help maintain calibration of the VOR and contributes to posture during static and dynamic activities
true
105
a large % of pts with mTBI may complain of what central vestibular complaint?
vertigo
106
a lot for interventions for concussion are _____ based
habituation
107
what is the MSQ (motion sensitivity quotient)?
an assessment of dizziness and motion sensitivity by having the pt move in various positions
108
the scale of the MSQ is from 0-5 with 0 meaning what? 5 meaning what?
0=no sx 5=severe sx
109
if a pt scores a 0% on the MSQ, what does this mean? what if they score 100%?
0%=no dizziness 100%=severe dizziness
110
what are some of the movt included in the MSQ?
supine to sit, sitting to nose to right knee, turns, etc
111
what is the mMSQ (modified motion sensitivity quotient)?
a quicker assessment of dizziness and motion sensitivity that involved more aggressive position changes
112
what are some of the movts included in the mMSQ?
head turns, trunk bends, turns, VORc
113
t/f: there is a clear set of motor fxn measures to assess motor fxn impairment in concussion
false
114
what aspects of motor control can be affected by concussion?
postural control dual tasking/divided attention tasks response time static/dynamic balance
115
what are commonly used tests for motor fxn impairment in concussion?
BESS test FGA SOT HiMAT
116
what is the BESS test?
the clinical analog to the SOT to ID integration of sensory info contributing to balance
117
what are two common factors for each condition of the BESS test?
EC 20 sec long
118
in the BESS test we count the number of errors, but what counts as an error?
moving the hands off the iliac crests opening the eyes step, stumble, or fall abd/flexion of the hip beyond 30 deg lifting the forefoot or heel off the testing surface remaining out of the proper testing position for >5 sec
119
what is the max total # of errors for each condition of the BESS test?
10
120
t/f: if the pt can't establish a position for any condition of the BESS test, it automatically counts as the max 10 errors for that condition
true
121
if more than one error occurs simultaneously during the BESS test, how many errors does this count as?
just 1
122
what are the 6 conditions of the BESS test?
EC, firm surface, NBOS EC, firm surface, SLS (on good leg) EC, firm surface, tandem stance (good leg fwd) EC, foam, NBOS EC, foam, tandem stance (good leg fwd) EC, foam, SLS (on good leg)
123
what is a highly recommended, but very long TBI edge recommended outcome for motor fxn in concussion?
HiMAT
124
what is involved in testing autonomic/exertional impairments in concussion?
the Buffalo concussion treadmill test (BCTT) or Buffalo concussion bike test (BCBT)
125
what is the BCTT?
a standardized, progressive exercise test that can be utilized to dx physiologic dysfxn following mTBI
126
what is the protocol for the BCTT (long ass answer)?
Obtain HR after 2 min rest b4 getting pt on treadmill Set treadmill to 3.2mph for pts up to 5’10” and 3.6mph for pts 5’10” and above Start incline at 0 HR stage o is HR when pt is standing on treadmill b4 starting BCTT and not during 2 min rest After 1 min at this pace, treadmill incline increased by 1 deg and pt is asked to rate their sx severity (VAS) and RPE at the beginning of each stage HR also recorded at the beginning of each stage Procedure repeated each minute while treadmill is inclined at a rate of 1deg/min 1 point given for any worsening sx and 1 point for any addition of new sx Once treadmill reaches max incline (15 deg), speed is increased by 0.4mph each min in lieu of increased incline Once test is terminated, speed is reduced to 2mph and incline reduced back to 0 for 2 min cool down (if pt is able) HR, RPE, VAS, plus any additional comments (if needed) are recorded after the 2 min cool down
127
how do we interpret the results of the BCTT?
the max HR achieved at sx exacerbation (HR threshold) gives us info to provide subsymptom physical activity
128
in the BCTT, if the pt is able to exercise to voluntary exhaustion w/o any inc in sx but isn’t cleared to return to play bc of sx at rest of physical exam impairments, then the pt can perform what kind of exercises?
aerobic exercise at any HR up to the max achieved or at 85% of age-appropriate max
129
what are the stopping criteria for the BCTT (long ass list)?
Sx exacerbation (inc of 3 or more points on the VAS scale from resting VAS score) Voluntary exhaustion (RPE>17 w/o sig sx exacerbation) Examiner notes a rapid progression of complaints or pts appears faint or has stopped communicating or continuing the test constitutes a sig health risk for the pt Pt has reached 90% or more of age predicted max w/o any inc in sx and still reporting low RPE
130
t/f: if pt in the BCTT hasn't reached at least 80% of age predicted max (220-age), the examiner should encourage the pt to try and keep going but shouldn't push if they are too exhausted
true
131
t/f: concussion pts demonstrate normal HR response and higher RPE
false, they demonstrate mild blunted HR response, altered HR variability, and higher RPE
132
t/f: evidence suggests that moderate levels of physical activity within the first week after injury can reduce sx (earlier return to activity).
true
133
how does exercise help with concussion recovery?
exercise promotes neuron growth and repair through brain dervied neurotrophic factor (BDNF)
134
what level of exercise can be cognitively protective and associated with greater levels of BDNF, which is involved in neuron repair after injury, as well as greater hippocampal volume and improved spatial memory?
moderate aerobic exercise (60% HRmax performed for 150min/week)
135
what are indications for referrals according to the mTBI CPG?
Persistent migraine type HAs or chronic HAs (often need to be managed with meds) Vision impairments Auditory impairments Mental health sx Sleep disturbances Cognitive impairments
136
what is involved in concussion interventions?
early mobilization to tolerance (after 24-48 of rest) using the 2 point sx rule
137
what is the 2 point sx rule?
Monitor sx and if they change by 2 VAS points, stop
138
t/f: matching targeted and active tx to clinical profiles may improve recovery trajectories after concussion
true
139
what is involved in pt education in concussion?
concussion sx expectations self management prognosis risks of subsequent injury return to activity progressions referrals
140
cervical interventions should aim to do what for concussion?
improve cervical and thoracic spine strength, ROM, postural position, and sensory motor fxn
141
t/f: stronger neck ms and anticipatory cervical ms activation reduces risk for future concussion
true
142
are there clear guidelines for cervical interventions post concussion?
nope, so base them on the clinical presentation and fxn limitations and use the CPG for neck pain as guidance
143
what are commonly used strategies for cervical MSK interventions for concussion?
AROM/PROM manual therapy/massage/mobs postural re-ed, ther ex craniocervical flexion/deep neck flexor strengthening joint position error training
144
tx and assessment in VT (vision therapy) should include what things?
Vergence (most common) Accommodation fxn (most common) Eye movt fxn (smooth pursuits, saccades)
145
what are the primary goals of vestibular interventions post concussion?
to reduce dizziness and improve gait and balance fxn
146
t/f: it is possible for there to be a transient increase in sx during vestibular training post concussion
true
147
what is involved in vestibular intervention post concussion?
central VOR activity habituation motion tolerance training BPPV tx (Eply for posterior canal, BBQ/Gufoni for horizonal canal) gaze stabilization visual motion sensitivity balance retraining
148
what gaze stabilization exercises may be used post concussion for vestibular interventions?
VORx1, VORx2, gaze shifting, and remembered targets with progression in speed, distance, duration, balance demand, background disturbance, reps, and task specificity Start at 15-30sec to 2 min max Best place to start-sitting with blank background
149
the goal of gaze stabilization training is normally to increase VOR gain, what is the goal of gaze stabilization in concussion intervention?
to restore tolerance to dynamic head movt
150
151
What is habituation?
Reeducation in response to repeatedly performed movt
152
What are the protocol for habituation training in post concussion?
Find provoking activities from the MSQ, VOR, or clinical assessment and use 3 of those as your intervention Hold the provoking position 30 sec or until sx abate Perform 2-3x/day, 3-5x each exercise
153
T/f: habituation exercises are designed to reproduce dizziness
True
154
What interventions are often used as the primary intervention when there is a centrally driven dysfunction?
Habituation
155
When do we habituate?
When the pt is intolerant to motion When there is a central vestibular problem
156
What is the aim of exertional tests and aerobic exercise?
To help speed recovery and get faster rate of return to PLOF
157
The protocol for aerobic exercise interventions are primary guided by what?
Symptoms
158
What are the benefits of aerobic training post concussion?
Reduced reconditioning Promotes fxnal brain healing Promotes non-pharmaceutical improvement to mental health
159
T/f: we should choose mild to moderately provocative items to work on with post concussion pts
True
160
If a post concussion pt fits into multiple trajectories, how do we decide what interventions to use?
Using the piece meal method 15 min of intervention in one trajectory, then the next, then the next
161
What assessment should we use to guide aerobic activity interventions?
The BCTT, or BCBT
162
How do we determine sub symptom threshold training?
Take the HR at stopping criteria on the BCTT and use 80% of this, 20min/day, for 3-5 days/week
163
How do we progress sub symptom threshold training?
Increase 5-10 bpm of their target HR every 2 weeks and retest the BCTT Make progressions to more moderate activities like jogging and agility drills
164
There is physiologic recovery once a pt reaches what % of their age predicted HRmax?
85-90%
165
What motor interventions can we use post concussion?
Static and dynamic balance Motor coordination and control Dual/multitasking Work/school/recreation/sports specificity
166
What is the primary goal of motor function interventions post concussion?
To improve balance fxn and dual task activities
167
T/f: motor functions interventions involved a gradual progressive return to higher level motor fxn tasks and challenges, including return to work ad return to sport/activity
True
168
What stages of return to sport is PT involved most in?
Stages 2-4
169
What is stage 2 of RTS?
Light aerobic exercise (walking, stationary bike at slow to medium pace) No resistance training
170
What is the goal of stage 2 RTS?
Increase HR
171
What is stage 3 RTS?
Sport specific exercise (running/skating drills) No head impact activities
172
What is the goal of stage 3 RTS?
Add movt
173
What is stage 4 RTS?
Non-contact training drills (passing drills) May start progressive resistance training
174
What is the goal of stage 4 RTS?
Exercise, coordination, increased thinking
175
How long do to have to spend in each stage of the RTS progression?
At least 24 hours
176
When does RTS progression begin?
After the initial 24-48 relative rest period
177
If any sx worsen during a stage of the RTS progression, what do we do?
Go back to the previous step in the progression
178
What are the 3 school modifications we can use post concussion if absolutely necessary?
Temporary academic adjustments 504 plan (5 weeks-4 months) IEP (>6 months)