ch. 8 coordination Flashcards
unilateral/bimanual tasks have an influence on Fitts’ paradigm, pending ID
BIMANUAL
Kelso + Jeka (remember JK)
-found that limbs moving in the same direction demonstrate more stable patterns than limbs moving in opposite directions
-this was only true for upper + lower limb combinations, which were more stable for contralateral pairs than ipsilateral pairs
“limbs moving in same directions have more stable patterns than limbs moving in opposite directions” is only true for what combinations
upper + lower limb combinations
upper + lower limb combinations are more stable for ipsilateral/contralateral pairs
contralateral
Peters
(THINK PETER PIPER)
-looked at 100 subjects to see if they could recite a nursery rhyme at the same time as tapping their hands to a different rhythm
-ALL subjects were unsuccessful (interference occurred)
is it possible to recite a nursery rhyme at same time as tapping hands to a different rhtyhm?
NO
Yamanishi, Kawato, Suzuki (remember SKY)
-subjects tapped L/R fingers with L/R visual metronomes which gave either in phase/symmetric or out of phase/anti-phase/asymmetric
-in phase (0, 360) performed best
-anti-phase (180)
-in phase + anti-phase perform with greater accuracy/stability than any other phase relation
in phase #s
0, 360
out of phase #s
180
which phase relations perform greatest accuracy/stability
in-phase + anti-phase
-in-phase is BEST
Saeb, Weber, Triesch
(remember SWT, swift)
-monkey looks straight ahead where unexpected target will appear in periphery of visual field
-eyes, head, + gaze have different timelines in reaching the stimulus
-eyes first, then quickly stabilizes
-gaze after eyes, continues to look at object
-head takes the longest
-head + eyes are coordinated by opposite timing- by the time the head gets to the stimulus, the eyes have already left
what does gaze refer to
fovea
do eyes, head, + gaze have same timelines
NO
-eyes first, then stabilize
-gaze follows + continues to look at object
-head takes the longest
-by the time the head reaches stimulus, eyes have already left
describe coordination of head + eyes
coordinated by opposite timing
-by the time the head gets to the stimulus, the eyes have already left
reaching + grasping tasks are discrete/continuous/serial
discrete
____ allows person to quickly identify stimulus
saccades
why do saccades help with coordination
because of tight connection between head + eye movement
reaching + grasping tasks are coordinated in ____ + ____
time + space
reaching + grasping tasks have a ____ that coordinates timing between eyes, head, + hand
GMP
what 3 things does GMP for reaching + grasping tasks coordinate timing between
eyes
head
hand
reaching + grasping tasks are unimanual/bilateral
unimanual
vestibular-ocular reflex (VOR)
rotation of head is detected ->
triggers IPSP (inhibitory postsynaptic potential) to eye muscles on 1 side + EPSP (excitatory postsynaptic potential) to eye muscles on other side ->
results in eye movement
why are eyes + head coordinated
because of their opposing motions
eyes ____ for head movement to stabilize visual image on retina
compensate
