ANSWERS GRADED A++
turning is dependent on what type of information
visual information
spin-turn
occurs when make a turn toward the limb that is forward
step-turn
occurs when turning away from the forward limb
easy and stable
initiation of a turn requires
visual input
feedforward motor control
initiation of gate begins with
relaxation of gastroc/soleus
-forward fall with step to recover
activation of the TA is responsible for
forward progression
steady state velocity is achieved in 1-3 steps
automatic postural strategies
, ankle kip and step
used with upright standing
arms as stabilizers
arms go forward with LOB posterior to move COM anterior
arms used as whole body response to protect self from fall
surfboard strategy
lowering CoM
arms out-predicts unsteadiness
posterior loss of balance-arms forward
slipping involves activation of muscles in ______ sequence
distal to proximal
backward slip at heel strike-> TA->RF->BF-> glut med->abs
tripping involves
phase dependent responses
early in swing tripping
elevating strategy on swing limb
elevation on stance limb
mid swing tripping
elevation or lowering
late in swing tripping