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

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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?

Pure motor hemiparesis (C) Signup and view all the answers

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

Anterolateral temporal lobe and posterior parietal lobe (C) Signup and view all the answers

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

Hemineglect on the left side (A) Signup and view all the answers

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

Left MCA Superior Division (B) Signup and view all the answers

Which brain region is responsible for motor planning for extremities?

Fastigial nucleus (C) Signup and view all the answers

Which pathway influences distal limb coordination?

LCST (B) Signup and view all the answers

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

Oculomotor channel (D) Signup and view all the answers

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

Left face and arm weakness (C) Signup and view all the answers

Which structure is involved in proximal limb and trunk coordination?

Flocculonodular lobe (A) Signup and view all the answers

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

Temporal cortex (C) Signup and view all the answers

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

Left leg weakness (D) Signup and view all the answers

Which area is mainly affected by right ACA infarcts?

Anterior Parietal Lobe (B) Signup and view all the answers

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

Right hemiplegia (A) Signup and view all the answers

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

Corticobulbar and corticospinal tracts (A) Signup and view all the answers

What deficits are associated with right MCA Deep Division infarcts?

Left leg weakness (C) Signup and view all the answers

Which structure is affected by basal ganglia dysfunction?

Internal Capsule (D) Signup and view all the answers

What deficits would be expected with left ACA infarcts?

Left leg sensory loss (D) Signup and view all the answers

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

Hemiplegia on the ipsilateral side (C) Signup and view all the answers

What type of injury leads to right leg sensory loss?

Upper Motor Neuron (UMN) injury (A) Signup and view all the answers

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

Left ACA infarcts (C) Signup and view all the answers

What is the function of the Vestibulospinal Tracts?

Control balance and extensor tone (D) Signup and view all the answers

Where does the pyramidal decussation occur?

Cervicomedullary junction (A) Signup and view all the answers

Which tract is responsible for controlling facial muscles?

Corticobulbar Tract (B) Signup and view all the answers

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

Facilitates extensor muscle tone (D) Signup and view all the answers

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

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

Which tract controls bilateral axial and girdle muscles?

Anterior Corticospinal Tract (D) Signup and view all the answers

Where does the decussation occur for the Rubrospinal Tract?

Midbrain (D) Signup and view all the answers