Physiology VII: Spinal Reflexes, Upper Motor Neurones and the Control of Movement

Question 1 of 6

1

Select from the dropdown list to complete the text.

Lets say you want to perform flexion of the thigh. Doing so would stretch the extensors of the thigh, which would initiate the myotatic (stretch) reflex, rendering you unable to flex your thigh. This is obviously not how things work. When alpha motor neurons to the flexor muscles are excited, the extensor muscles that should act against it are inhibited by means of inhibitory ( interneurons, alpha motor neurons, gamma motor neurons, delta alpha neurons ) that branch off of said alpha motor neuron, thus allowing flexion to occur.

Explanation

Question 2 of 6

1

Select from the dropdown list to complete the text.

The Flexor Reflex and the Crossed Extensor Reflex are reflexes that cause a limb to flex/extend (respectively) in response to harmful stimuli. Such reflexes are mediated by ( excitatory, inhibitory ) interneurones.

Explanation

Question 3 of 6

1

Select from the dropdown lists to complete the text.

In terms of the Corticospinal tract, most fibres decussate at the decussation of the pyramids in the ( medulla, pons, midbrain ), to form the ( lateral, medial, dorsal, ventral ) corticospinal tract.

Explanation

Question 4 of 6

1

Click on the orange point and write the correct answer.

The below labelled motor tract controls flexion or muscles mainly in the upper body. What is it called?

Explanation

Question 5 of 6

1

Which vestibular tract is responsible for the vestibulo-ocular reflex?

Select one of the following:

Tectospinal Tract
Lateral Vestibulospinal Tract
Medial Vestibulospinal Tract

Explanation

Question 6 of 6

1

The Tectospinal Tract utilises the Superior Colliculus to perform its functions (e.g. orientation of the head and eyes to an important, new visual stimulus)

Select one of the following:

True
False

	Created by Matthew Coulson almost 6 years ago

Physiology VII: Spinal Reflexes, Upper Motor Neurones and the Control of Movement given by Prof John Peters

Physiology VII: Spinal Reflexes, Upper Motor Neurones and the Control of Movement

Question 1 of 6

Select from the dropdown list to complete the text.

Explanation

Question 2 of 6

Select from the dropdown list to complete the text.

The Flexor Reflex and the Crossed Extensor Reflex are reflexes that cause a limb to flex/extend (respectively) in response to harmful stimuli. Such reflexes are mediated by excitatory inhibitory( excitatory, inhibitory ) interneurones.

Explanation

Question 3 of 6

Select from the dropdown lists to complete the text.

In terms of the Corticospinal tract, most fibres decussate at the decussation of the pyramids in the medulla pons midbrain( medulla, pons, midbrain ), to form the lateral medial dorsal ventral( lateral, medial, dorsal, ventral ) corticospinal tract.

Explanation

Question 4 of 6

Click on the orange point and write the correct answer.

The below labelled motor tract controls flexion or muscles mainly in the upper body. What is it called?

Explanation

Question 5 of 6

Which vestibular tract is responsible for the vestibulo-ocular reflex?

Select one of the following:

Explanation

Question 6 of 6

The Tectospinal Tract utilises the Superior Colliculus to perform its functions (e.g. orientation of the head and eyes to an important, new visual stimulus)

Select one of the following:

Explanation

The Flexor Reflex and the Crossed Extensor Reflex are reflexes that cause a limb to flex/extend (respectively) in response to harmful stimuli. Such reflexes are mediated by ( excitatory, inhibitory ) interneurones.

In terms of the Corticospinal tract, most fibres decussate at the decussation of the pyramids in the ( medulla, pons, midbrain ), to form the ( lateral, medial, dorsal, ventral ) corticospinal tract.