Exam 8: Movement

The Babinski sign occurs when 

Muscle fibers respond to​ 

Describe the major features of fast and slow-twitch muscles,and discuss the implications of these different features for movement.

Activity in the basal ganglia is lower than normal in cases of 

Muscular dystrophy 

The rubrospinal tract is one of the ventromedial motor pathways.

Dystrophin,the protein that is affected by muscular dystrophy,normally acts to 

Compared with other sensory neurons,such as those that serve mechanoreceptors,Ia sensory fibers are​ 

As you bend your arm up to take a drink,the ________ muscles are active,and when you extend your arm to put the glass down,the ________ muscles are active.​ 

The pontine reticulospinal tract originates in the 

In a resting muscle fiber,_________ is covered by a protein called _________.​ 

Flexion reflexes,such as our withdrawal of our foot away from a sharp object,are examples of polysynaptic reflexes.

Neurons that fire when an organism either carries out a movement or observes another organism carrying out the same movement are known as _________ neurons.

Observations of the muscle fibers of people who have experienced spinal cord damage suggest that neural input is especially important to the maintenance of​ 

Motor neurons with small cell bodies usually innervate _________ muscle fibers.​ 

Reciprocal inhibition is a simple type of _________ reflex.

Alcohol exerts a negative effect on motor coordination particularly through its action on the 

Single segments of a myofibril are called​ 

What causes muscles to twitch? 

The basal ganglia inhibit the activity of the thalamus.