Lab 1
What does king devick test for
concussions
What increment do you increase the voltage by for the twitch?
5mV at a time
what muscle did we measure EMG from
anterior deltoid
what muscles did we collect EMG from
tibialis anterior and medial gastrocnemius
what does dual cost mean and what does it assess
performance is worse when doing 2 tasks
assesses automaticity
Starting distance at fingertip for 2 pt discrimination (mm)
5 mm
What bandpass settings are used for the bioamplifier?
low 10 Hz, high 1 KHz
hicks law vs fitts law
complexity = RT
target size and distance = MT
do we need to calibrate the equipment before use?
no!
describe the 3 stages of learning
cognitive- learning
associative- practicing
autonomous- automatic
role of afferent and efferent neurons
afferent- carry sensory info into the dorsal horn
efferent- carry motor info out of the ventral horn
Is the m wave a reflex?
no!
feedforward vs feedback control
execution of preplanned movement (memory)
movement to make corrections (sensory)
difference in muscle activation between predictive and reactive trials
predictive- muscles activate first (tib ant)
reactive- muscles activate after
what parts of the brain are involved in declarative vs procedural
d- hippocampus, premotor cortex, MTL
p- basal ganglia, cerebellum and PMC
ulnar nerve location at the wrist
the lateral side of pisiform
where should the electrode be placed? (cathode)
on the median nerve with the cathode facing the thenar muscles
predictable vs unpredictable trials
predictable- hit the same one that flashes
unpredictable- hit the opposite side of the one that flashes
gastroc and tib ant
quads, abs, back muscles, hamstrings
control- assess baseline
practice- skills acquired
retention- is there an after effect
savings- is the practice skill retained
referred sensation
feeling it distal to where the nerve is compressed
What is an axon artifact
no muscle response, only at the time of the stimulus
The time between the warning cue and the onset of the stimulus
foreperiod
Reactive control to a posterior perturbation (gastroc and tib ant)
gastroc- contracts ECCENTRICALLY to slow movement and then CONCENTRICALLY to bring back to normal
tib ant- contracts ECCENTRICALLY to slow backwards lean, then CONCENTRICALLY to bring back to normal
how do we know if learning has taken place?
-compare the end of the practice condition (perturbation) to the beginning of retention condition (no perturbation)
-if worse = after effect = learning