Midterm 1: Motor Tracts - Tract Site of Origin and Functions
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Questions and Answers

Which type of sensory loss is commonly associated with right MCA Inferior Division infarcts?

  • Somatosensory deficits on the left side (correct)
  • Visual field deficits in the right eye
  • Loss of proprioception in the right arm
  • Facial numbness on the right side

What is a common feature seen in patients with left MCA Superior Division infarcts?

  • Right arm weakness due to LMN injury
  • Right hemineglect to a variable extent
  • Sensory loss on the right face and arm
  • Normal strength on the left side (correct)

Which type of deficit is challenging to assess in patients with left MCA Superior Division infarcts?

  • Proprioceptive loss
  • Motor neglect
  • Visual field deficits (correct)
  • Somatosensory deficits

What is a characteristic feature of basal ganglia dysfunction following right MCA Superior Division infarcts?

<p>Pure motor hemiparesis (C)</p> Signup and view all the answers

Which area of the brain is typically affected in patients with right MCA Superior Division infarcts?

<p>Anterolateral temporal lobe and posterior parietal lobe (C)</p> Signup and view all the answers

What type of neglect is often observed in individuals with right MCA Inferior Division infarcts?

<p>Hemineglect on the left side (A)</p> Signup and view all the answers

In which division of the MCA would an individual most likely experience left motor neglect?

<p>Left MCA Superior Division (B)</p> Signup and view all the answers

Which brain region is responsible for motor planning for extremities?

<p>Fastigial nucleus (C)</p> Signup and view all the answers

Which pathway influences distal limb coordination?

<p>LCST (B)</p> Signup and view all the answers

Which channel of the Basal Ganglia targets the supplementary eye fields?

<p>Oculomotor channel (D)</p> Signup and view all the answers

What is the effect of a vascular injury in the lateral frontal lobe to the anterior parietal lobe?

<p>Left face and arm weakness (C)</p> Signup and view all the answers

Which structure is involved in proximal limb and trunk coordination?

<p>Flocculonodular lobe (A)</p> Signup and view all the answers

Which cortical target of output is associated with the Limbic channel from the Basal Ganglia?

<p>Temporal cortex (C)</p> Signup and view all the answers

What type of deficits can occur with left cerebral artery damage?

<p>Left leg weakness (D)</p> Signup and view all the answers

Which area is mainly affected by right ACA infarcts?

<p>Anterior Parietal Lobe (B)</p> Signup and view all the answers

What deficits are expected with larger infarcts involving the Right ACA?

<p>Right hemiplegia (A)</p> Signup and view all the answers

Which tracts are affected by infarcts in the Deep Branches of the Internal Capsule?

<p>Corticobulbar and corticospinal tracts (A)</p> Signup and view all the answers

What deficits are associated with right MCA Deep Division infarcts?

<p>Left leg weakness (C)</p> Signup and view all the answers

Which structure is affected by basal ganglia dysfunction?

<p>Internal Capsule (D)</p> Signup and view all the answers

What deficits would be expected with left ACA infarcts?

<p>Left leg sensory loss (D)</p> Signup and view all the answers

Which is a common effect of an infarct involving the Right Common Carotid Artery?

<p>Hemiplegia on the ipsilateral side (C)</p> Signup and view all the answers

What type of injury leads to right leg sensory loss?

<p>Upper Motor Neuron (UMN) injury (A)</p> Signup and view all the answers

In which case would we expect larger infarcts to cause left hemiplegia?

<p>Left ACA infarcts (C)</p> Signup and view all the answers

What is the function of the Vestibulospinal Tracts?

<p>Control balance and extensor tone (D)</p> Signup and view all the answers

Where does the pyramidal decussation occur?

<p>Cervicomedullary junction (A)</p> Signup and view all the answers

Which tract is responsible for controlling facial muscles?

<p>Corticobulbar Tract (B)</p> Signup and view all the answers

What is the primary function of the Rubrospinal Tract in humans?

<p>Facilitates extensor muscle tone (D)</p> Signup and view all the answers

In a Transverse Cord Lesion, what symptom is expected related to the Anterolateral pathway?

<p>Loss of proprioception, vibration, light touch info at the level of injury and below it bilaterally (C)</p> Signup and view all the answers

Which tract controls bilateral axial and girdle muscles?

<p>Anterior Corticospinal Tract (D)</p> Signup and view all the answers

Where does the decussation occur for the Rubrospinal Tract?

<p>Midbrain (D)</p> Signup and view all the answers

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