Concussion Flashcards
key elements concussion
direct blow to head, face, neck
rapid onset of short lived problems
no abnormalities on neuroimaging
clinical symptoms
symptoms concussion
cognitive
fatigue
headache
anxiety/mood
ocular
vestibular
CNS vital signs subtests
verbal memory
visual memory
finger tapping
symbol digit coding
stroop test
shifting attention
continous performance/attention
CNS outcomes
per domain:
subject score
standard score
percentile rank
validity indicator
subject score CNS
based on correct, incorrect and reaction time
standard score CNS
normalized score based on age
- 100 is perfect, >100 is above normal, < 100 is lower than normal
percentile ranks CNS
index of score compared to age-matched subjects
CNS outcome domains
composite memory
verbal memory
visual memory
psychomotor speed
motor speed
processing speed
reaction time
complex attention
simple attention
executive functioning
cognitive flexibility
reasons for invalid CNS
motivation/effort
misunderstanding assignment
environmental influences
SET definition
stability evaluation test
BESS definition
balance error scoring system
SET condition
firm vs foam
- double leg
- single leg
- tandem stance
SET outcome parameters
average sway velocity
center of gravity traces
time in balance
vHIT definition
video head impulse test
vHIT description
pupil detection during evoked impulses on the head
vestibulo ocular reflex
stabilzing an image on the retina by moving eyes in opposite direction of head
requirements impulses vHIT
120-150deg/s
10-20 degrees
20 correct horizontal
10 correct vertical
outcome parameter vHIT
VOR-gain
VOR-gain definition
ratio between eye and head movement (deg/s)
- 1 is perfectly synchronous
- above 1: more eye than head movement
data quality vHIT
good impulses
good pupil detection > make-up, thick lashes
minimal 1 m to fixation dot
DVA definition
dynamic visual acuity test
DVA description
static and dynamic identification of visual stimulus
outcome parameters DVA
perception time
DVA loss
DVA loss symmetry
perception time (PTT) DVA
minimum time to identify stimulus
- normal 20-60ms
