Herniations

Question 1

Tonsillar Herniation

Answer 1

Displacement of cerebellar tonsils into the foramen magnum.

They compress the brainstem and cause cardiopulmonary arrest

Question 2

Subfalcine herniation

Answer 2

Involves displacement of the cingulate gyrus under the falx cerebri (falx cerebri separates the two hemispheres)

Compresses the anterior cervical artery

Question 3

Uncal Herniation

Answer 3

Uncus of temporal lobe under the tentorium cerebelli

• compresses cranial nerve III and leads to down and out pupil
• posterior cerebral artery compression leads to infarction of occipital lobe
• Paramedian artery rupture leads to Duret hemorrhage.

Question 4

Hydrocephalus causes in a baby

Answer 4

• Intraventricular matrix hemorrhage
• Arnold Chiari
• Dandy Walker
• Spina Bifida

Question 5

Hydrocephalus in an older children

Answer 5

Tumor, infection

Question 6

In an ault, hydrocephalus causes

Answer 6

subarachnoid hemorrhage, tumor