Cortex, Corticospinal Tract (Msq Drill 266)

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1. If the lesion in the cerebral cortex is on the right the symptoms will be evident on which side?

Explanation

This is before the decussation so the contralateral side will be affected.

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Cortex, Corticospinal Tract (Msq Drill 266) - Quiz

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2. Do patients with locked in syndrome retain any intellecutal capacity?
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3. Sensory neurons are ascending or descending?
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4. The corticospinal tract is a motor or sensory tract.
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5. If a patient has damage to the cerebral cortex are their deficits ipsilateral or contralateral?
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6. The corticospinal tract transmits neurons that will ultimately elicit _______ muscle movments via the efferent second order motor neuron.
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7. As soon as you move out of the spinal cord you are in the:_
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8. The upper motor neurons all come together in a funnel like structure known as the
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9. What structure will you find in 4?
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10. A patient has a lesion of the corticospinal tract at C5, what side are the symptoms, ipsilateral or contralateral?

Explanation

C5 is below the pyramidal deccusation.

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11. Which disease i.e. upper motor damage or lower motor neuron damage will you observe hyperreflexia? UMN - UPPER MOTOR NEURON LMN - LOWER MOTOR NEURON

Explanation

This is because the cortex inhibits the reflex. When you lose the cortex, you lose that inhibition and thus the hyperreflexia.

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12. Name this structure:  B
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13. The ________  is the doorway to the cortex.
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14. Does the thalamus have any nuclei in it?
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15. What type of fibers course in structure B?
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16. The brainstem is made up of the pons, medulla and ________ .
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17. The gray matter in cortex contains

Explanation

The white matter has tracts or axons.

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18. Increased muscle tone, Priapism & muscle weakness are indicative of UMN or LMN damage?
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19. Will you continue to exhibit reflexes in lower motor neuron damage?

Explanation

No reflexes will be present. The LMN is responsible for the reflex arc.

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20. Where does the corticospinal tract begin?

Explanation

AKA primary motor cortex

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21. The pyramidal decusation is in the
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22. In the medulla the corticospinal tract will be found in the
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23. All sensory information passes thru the thalamus except for the sense of __________ .
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24. The ________________ is sometimes referred to as the little brain.
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25. Patients with "Thalamic Pain syndrome" will complain of intractible pain to the same side of the body or the opposite side of the body?
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26. Atrophy of muscles and fasciculations are observed in a patient with UMN or LMN disease?
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27. The __________ is found in the area in which the ascending spinal chord starts to widen and thicken.
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28. Is the cortex involved in a typical reflex arc?

Explanation

There is no corticol input. This is an involuntary, unconscious input from the sensory nerve into the spinal cord and straight back out to the muscle. There is no cortical input.

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29. Is the corticospinal tract myelinated at birth?
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30. A bilateral lesion to the brainstem, mostly the pons leads to a syndrome called _______ in which there is a complete loss of all motor activity.
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31. Before entering the midbrain, upper motor neurons pass thru this funnel shaped structure. 
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32. What is this syndrome?  Follows after acute damage to the spinal cord, Spinal cord functions below the lesion are depressed, ipsilateral lower motor neuron signs, lasts for about 24 hours, can be tested by anal reflex or bulbocarvenosus reflex.
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33. Patients with locked in syndrome may only retain the ability to _______ even though they have lost all other activity.
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34. The femoral nerve is a motor nerve only. True or false?

Explanation

It has both sensory and motor neurons.

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35. Does this patient have spastic or flaccid paralysis?  Pt has no babisnki and has lower motor neuron damage.

Explanation

Lower motor neuron damage is synonymous with flaccid paralysis. Upper motor neuron damage will have a positive babinski.

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36. The upper motor neuronms are topographically arranged. A lesion in the most lateral portion of the lateral corticospial tract would probably affect:

Explanation

This applies to lesions in the cortex as well. It is important to check where the lesion is. If the lesion is on the lateral cortex, the patient will still have no babinski because no damage has occured at the lower extremity area.

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37. The lateral cortical spinal tract is in the _____ matter of the____________ .
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38. Lower motor neurons begin in the:
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39. From the cortex to the muscle how many neurons are involved?

Explanation

Upper and lower motor neurons.

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40. The farther out on the limb the less the coordination is observed in UMN or LMN damage?
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41. Where do the lateral cortical tracts terminate?
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42. Name the structure:-
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43. The thalamus sits on top of the ______________________.
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44. The corticospinal tract in the ________ is found in the basis pontus.
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45. In ascertaining where the lesion is, if the reflexes are absent at a certain level, the damage will typically be:-
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46. What is structure A?


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47. What is structure B?
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48. Does every tract decusate?
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49. On which side is the upper motor neuron? Ipsilateral or contralateral.
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50. Name structure 3
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51.

Where are the cell bodies for structure A found?

Explanation

These are the pyramids. So the cell bodies are in the ipsilateral motor cortex because the decussation is below this level.

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52. In the ___________ the corticospinal tract is in the ___________
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53. A hemisection of the spinal chord at C5 would damage LMNs or UMNs or both at C5 level?

Explanation

The only damage at C5 would be LMN only. Below the lesion it will be total upper motor neuron damage. Reflexes would be heightened below the lesion.

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If the lesion in the cerebral cortex is on the right the symptoms...
Do patients with locked in syndrome retain any intellecutal capacity?
Sensory neurons are ascending or descending?
The corticospinal tract is a motor or sensory tract.
If a patient has damage to the cerebral cortex are their deficits...
The corticospinal tract transmits neurons that will ultimately elicit...
As soon as you move out of the spinal cord you are in the:_
The upper motor neurons all come together in a funnel like structure...
What structure will you find in 4?
A patient has a lesion of the corticospinal tract at C5, what side are...
Which disease i.e. upper motor damage or lower motor neuron damage...
Name this structure:  B
The ________  is the doorway to the cortex.
Does the thalamus have any nuclei in it?
What type of fibers course in structure B?
The brainstem is made up of the pons, medulla and ________ .
The gray matter in cortex contains
Increased muscle tone, Priapism & muscle weakness are indicative...
Will you continue to exhibit reflexes in lower motor neuron damage?
Where does the corticospinal tract begin?
The pyramidal decusation is in the
In the medulla the corticospinal tract will be found in the
All sensory information passes thru the thalamus except for the sense...
The ________________ is sometimes referred to as the little brain.
Patients with "Thalamic Pain syndrome" will complain of intractible...
Atrophy of muscles and fasciculations are observed in a patient with...
The __________ is found in the area in which the ascending spinal...
Is the cortex involved in a typical reflex arc?
Is the corticospinal tract myelinated at birth?
A bilateral lesion to the brainstem, mostly the pons leads to a...
Before entering the midbrain, upper motor neurons pass...
What is this syndrome?  Follows after acute damage to the spinal...
Patients with locked in syndrome may only retain the ability to...
The femoral nerve is a motor nerve only. True or false?
Does this patient have spastic or flaccid paralysis?  Pt has no...
The upper motor neuronms are topographically arranged. A lesion in the...
The lateral cortical spinal tract is in the _____ matter of...
Lower motor neurons begin in the:
From the cortex to the muscle how many neurons are involved?
The farther out on the limb the less the coordination is observed in...
Where do the lateral cortical tracts terminate?
Name the structure:-
The thalamus sits on top of the ______________________.
The corticospinal tract in the ________ is found in the basis pontus.
In ascertaining where the lesion is, if the reflexes are absent...
What is structure A?
What is structure B?
Does every tract decusate?
On which side is the upper motor neuron? Ipsilateral or contralateral.
Name structure 3
Where are the cell bodies for structure A found?
In the ___________ the corticospinal tract is in the ___________
A hemisection of the spinal chord at C5 would damage LMNs or UMNs or...
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