We continued with the 'warming up'. We addressed the tentorial herniation. The

15 important questions on We continued with the 'warming up'. We addressed the tentorial herniation. The

What can occur with a subdural hematoma?

Bleeding pressure may move towards the midline of the brain.
  • Subdural hematoma
  • Midline

How is pupil dilation achieved?

Dilation occurs through the sympathetic nervous system.
  • Pupil dilation
  • Sympathetic nervous system

What might occur during a subdural haematoma?

Pressure may impact the medial temporal lobe, particularly the uncus.
  • It pushes against the tentorial notch.
  • This can compress the oculomotor nerve.
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What is the clinical outcome when the uncus presses against the oculomotor nerve?

Specific position of the eye occurs: intorsion, depression, and abduction.
- Managed by the superior oblique and lateral rectus muscles.

What muscles control the position of the eye affected by oculomotor nerve dysfunction?

Superior oblique and lateral rectus muscles.
  • Innervated by CN IV and CN VI.
  • Oculomotor nerve affects other eye muscles.

What is a visible sign of oculomotor nerve suppression?

Blown pupil results from nerve dysfunction.
  • Pupil constriction is affected.
  • Dilation involves the sympathetic nervous system.

How is the corticospinal tract divided?

Lateral and anterior corticospinal tracts.
  • Lateral corticospinal: 85% for fine motor.
  • Anterior corticospinal: 15% for gross motor.

What is the role of the anterior corticospinal tract?

Gross motor functions of the trunk are managed.
- Belongs to descending medial motor pathways.

What does the corticobulbar tract descend from?

Primary motor cortex, adjacent to the corticospinal tract.
  • Passes through the internal capsule.
  • Innervates motor nuclei of cranial nerves.

What is unique about the facial nerve's innervation?

Bilateral innervation for the upper part only.
  • Lower part has only contralateral innervation.
  • Facial nerve is CN VII.

What happens during a subdural haematoma?

Bleeding increases pressure, pushing against the medial temporal lobe.

What part of the brain is affected when the uncus is pushed?

The tentorial notch is where the uncus gets displaced.

Where does the oculomotor nerve exit the brainstem?

At the top of the pons, the oculomotor nerve exits.

What are the two divisions of the corticospinal tract?

Lateral (85%) and anterior (15%) corticospinal tracts.

How is CN VII innervation different from other cranial nerves?

Only lower part has contralateral innervation; upper part is bilateral.

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