Module 2 Lecture 1 Motor System

Which part of the motor system is in charge of planning, initiating, and directing voluntary movements?

Which part of the motor system is in charge of basic movements and postural control?

________ gates proper initiation of movements.

________ coordinates sensory and motor signals.

Sensory input passes through ______ and directly relay signals to ______ and then skeletal muscles, without having to pass through the brain.

In feed forwad control, a ___________ is generated based on a _________. Any errors arise during the movement are (monitored/ not monitored)

With feedback control, the ______ is compared with the ________at the ________ to generate an ________, which helps shape the motor command.

T/F: The sensory feedback to the comparator occurs simultaneously without delay.

What are some advantages of feedforward control?

List a disadvantage of
1) feedforward control
2) feedback control

During the study of delayed feedback, which situation results in what type of delay?
1. high gain low delay
2. increasing delay
3. decreasing gain
4. high gain with 1 cycle of lag time

During the microneurography study of grip and object weight, when subject knows the weight of the object in advance, the applied force is adequate to lift the object and the grip force increase ______ with the load.

During the microneurography study of grip and object weight, when the subject is lifting a 400g weight, the constant grip activates the ______ in the skin and a burst of action potentials occur in the afferent ______ fibers, signaling the beginning of the hold phase.

During the microneurography study of grip and object weight, when the weight is larger than expected, the object slips initially, the ______ fibers are NOT activated, which triggers a ________

During executing a simple task of reaching for a cup, translate the following steps into motor language.
1. locate hand and cup
2. plan hand movement
3. determine intrinsic plan
4. execute the movement

What are the necessary skills involved between each step of motor planninng?

Multiple limb configuration that can achieve the same endpoint position is called ___________

Multiple relative contributions of force from different muscles will produce the same joint torque, this concept is called ________.

Name the concept:
the same muscle force can come from different contributions of force from different motor units.

The video of a parkinson patient biking freely is a good example for ________.

Advantage of passive mechanics.