DPT 708 MOTOR CONTROL - REACH AND GRASP EXAM
QUESTIONS AND ANSWERS WITH COMPLETE
SOLUTIONS VERIFIED LATEST UPDATE
what are the 4 key elements of reach, grasp, and manipulation?
1. locating a target (visual regard)
2. reaching (transport of arm and hand in space)
3. grasping (grip formation, grasp, and release)
4. manipulation skills
what are the 4 neural components of reach and grasp?
1. motor processes
2. sensory processes
3. internal representations for mapping sensation and action
4. higher-level processes for adaptation and anticipation
what are non-neural components of reach and grasp?
1. musculoskeletal
-- joint ROM
-- spinal flexibility
-- muscle properties
-- biomechanics of linked systems
what are feedforward and feedback control important for?
, efficiency and accuracy of reach and grasp
anticipation of requirements of tasks and obstacles are?
feedforward control
what does feedforward control rely on? what is an example?
- previous experience to predict consequences of sensory info received to reduce
reliance on feedback
- ex: visual input about trajectory of ball
what does feedback control depend on?
input from sensory systems (visual, somatosensory) being compared to reference signal
in feedback control, the difference between sensory input and motor output is
used to ___
update motor program
what moves if object is in central visual field?
eye movement only
what moves if object is in periphery?
activation of muscles in neck --> activation of eye muscles for movement --> head
movement
what moves if object is far in periphery?
coordination of eye-head-trunk
the degree of head movement to target depends on ___
accuracy of task
- greater degree of accuracy reequired will see eyes and head turned completely toward
the target (vs 60-70%)
QUESTIONS AND ANSWERS WITH COMPLETE
SOLUTIONS VERIFIED LATEST UPDATE
what are the 4 key elements of reach, grasp, and manipulation?
1. locating a target (visual regard)
2. reaching (transport of arm and hand in space)
3. grasping (grip formation, grasp, and release)
4. manipulation skills
what are the 4 neural components of reach and grasp?
1. motor processes
2. sensory processes
3. internal representations for mapping sensation and action
4. higher-level processes for adaptation and anticipation
what are non-neural components of reach and grasp?
1. musculoskeletal
-- joint ROM
-- spinal flexibility
-- muscle properties
-- biomechanics of linked systems
what are feedforward and feedback control important for?
, efficiency and accuracy of reach and grasp
anticipation of requirements of tasks and obstacles are?
feedforward control
what does feedforward control rely on? what is an example?
- previous experience to predict consequences of sensory info received to reduce
reliance on feedback
- ex: visual input about trajectory of ball
what does feedback control depend on?
input from sensory systems (visual, somatosensory) being compared to reference signal
in feedback control, the difference between sensory input and motor output is
used to ___
update motor program
what moves if object is in central visual field?
eye movement only
what moves if object is in periphery?
activation of muscles in neck --> activation of eye muscles for movement --> head
movement
what moves if object is far in periphery?
coordination of eye-head-trunk
the degree of head movement to target depends on ___
accuracy of task
- greater degree of accuracy reequired will see eyes and head turned completely toward
the target (vs 60-70%)
