Motor Systems 1

Question 1

Define Reflex movement
Type:
Ex:
Complexity:

Answer 1

Question 2

Define Voluntary movement
Type:
Ex:
Complexity:

Answer 2

Question 3

Define Rythmic movement
Type:
Ex:
Complexity:

Answer 3

Question 4

Define the function of Efferent neurons.
What are the two subdivisions of efferent neurons. How do they differ?

Answer 4

Question 5

The somatic motor pathway:
1. What’s the literal pathway anatomically. Where does it originate.
2. What’s the characteristics of these neurons.
3. What innervates what?

Answer 5

Question 6

What is the NMJ? (Neuromuscular junction)
What’s its function?
What’s its neurotransmitter?

Answer 6

Question 7

What’s a motor unit?

Answer 7

1 motor neuron
That innervates multiple muscle fibers.
ONLY 1 motor neuron innervates a muscle fiber. A motor neuron can Innervate multiple muscle fibers, but it’s 1 neuron per fiber.

Question 8

What are the properties of motor unit(s) S?

Answer 8

Doesn’t tire!
Smallest axon diameter motor unit (aka slowest), meaning smallest cell body of neuron.

Question 9

What are the properties of motor unit(s) FR?

Answer 9

Question 10

What are the properties of motor unit(s) FF?

Answer 10

Largest cell body/axom diameter.
Fastest!

Question 11

Explain size principle in motor units.

Answer 11

Question 12

The Neural Control of Movement for Spinal Cord:
Role:
Receives input from:
Sends integrative output to:

Answer 12

Question 13

The Neural Control of Movement for Brain Stem:
Role:
Receives input from:
Sends integrative output to:

Answer 13

Question 14

The Neural Control of Movement for Motor areas of Cerebral cortex:
Role:
Receives input from:
Sends integrative output to:

Answer 14

Question 15

The Neural Control of Movement for Cerebellum:
Role:
Receives input from:
Sends integrative output to:

Answer 15

Question 16

The Neural Control of Movement for Thalamus:
Role:
Receives input from:
Sends integrative output to:

Answer 16

Question 17

The Neural Control of Movement for Basal nuclei:
Role:
Receives input from:
Sends integrative output to:

Answer 17

Question 18

For Skeletal Muscle Reflexes:
What generates input signals?
What integrates those signals?
What carry’s the output signal?

Answer 18

Question 19

Define what it means to say the motor neuron system/skeletal muscle has reciprocal innovation?

Answer 19

Inputs the actívate neurons that flex the muscle generally inhibit other neurons that extend and vise versa.

Question 20

What’s the leading theory for why skeletal muscle has reciprocal Innervation?

Answer 20

Load compensation.

Question 21

Explain this pathway

Answer 21

Question 22

Summary Slide

Answer 22