Central Nervous System Circuitry and Movement Execution Quiz

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What is the function of the medullary reticulospinal tract?

Inhibitory to flexor motor neurons

Facilitatory to extensor motor neurons (correct)

Facilitatory to flexor motor neurons

Inhibitory to extensor motor neurons

Which cells are found at the 2nd layer of cortical surface?

Stellate cells

Small pyramidal cells

Pyramidal cells

Large pyramidal cells of Betz (correct)

In a lesion at the lateral aspect of the cerebral hemisphere, which body part would experience weakness?

Arms

Legs (correct)

Thigh

Feet

In cases of slow destruction of anterior horn cells, fasciculations are seen only in patients with which type of lesion?

Lower motor neuron lesion Signup and view all the answers

What manifestation would a lesion in the lateral funiculus of the RIGHT cervical spinal cord affecting descending tracts produce?

Complete paralysis of the LEFT leg Signup and view all the answers

Which is a manifestation of an Upper Motor Neuron Lesion?

Clonus Signup and view all the answers

Which is a manifestation of a Lower Motor Neuron Lesion?

Atrophy Signup and view all the answers

Where would a lesion be located if a patient exhibits weakness in the face and upper extremities on the right side along with loss of pain, thermal sensation, and decreased vibratory sensation on the right side?

Left sensorimotor cortex Signup and view all the answers

In a case where a patient only exhibits symptoms related to the upper extremity but not the lower extremities, which location can be ruled out for lesions?

Internal capsule Signup and view all the answers

Which vessel supplies the area of the face and upper extremities and may be occluded in cases of an embolic stroke?

Middle cerebral artery Signup and view all the answers

In which part of the brain are pain, thermal sensation, and vibratory sensation lost due to a lesion?

Sensorimotor cortex Signup and view all the answers

Which tract would be implicated if a patient manifests weakness in both the upper and lower extremities on one side of the body?

Anterior corticospinal tract Signup and view all the answers

Which vessel supplies the area responsible for sensory and motor deficits that would be expected to be on the ipsilateral side?

Anterior cerebral artery Signup and view all the answers

Which structure would be implicated in a lesion that results in drowsiness and abnormal mental status examination?

Thalamus Signup and view all the answers

If a patient exhibits signs of weakness only in the lower extremities without involvement of the upper extremities, which structure can be ruled out for lesions?

Internal capsule Signup and view all the answers

What type of stroke would be expected if a patient exhibits symptoms of weakness in both upper and lower extremities on one side?

Embolic stroke involving the middle cerebral artery Signup and view all the answers

If a patient experiences loss of pain, thermal sensation, and decreased vibratory sensation on one side, which structure may be affected?

Cerebral cortex Signup and view all the answers

Central Nervous System Circuitry and Movement Execution Quiz

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