Responses of the Brain to Traumatic Injury Flashcards Preview

Medicine, Year 2, Block 12 (Neurological, Neuromuscular, and MSK Diseases) > Responses of the Brain to Traumatic Injury > Flashcards

Flashcards in Responses of the Brain to Traumatic Injury Deck (8):
1

Describe what the shape of an Extradural haemorrhage is on a brain scan?

Lens shaped (lemon)

2

Describe what the shape of a Subdural haemorrhage is on a brain scan?

Biconcave shaped (banana)

3

Why is a vomiting a marker for raised Intracranial pressure in a Brain Injury?

Because the vomiting centre is activated (can also be normal)

4

What is the normal ICP in the brain?

10 mmHg

5

Following a primary brain injury, describe what progressive damage could happen afterwards?

1. Mechanoportion (Lipid bilayer of Blood-Brain Barrier damage)
2. Calcium influx
3. Oxygen free radical formation
4. Cytokine mediated inflamation
5. Axotomy

6

According to the Monroe-Kelly doctrine, what is the compensatory mechanism to reduce Intracranial Pressure if there is a mass i.e. blood introduced in the brain?

Venous blood will passage out of the brain, and CSF will migrate out of the spinal cord

7

What is a consequence of exceeding beyond the Point of Decompensation to maintain ICP?

Uncal Herniation

8

What is the Cushing's reflex?

A physiological response to raised ICP. It is a triad of Hypertension, Irregular breathing, and Bradycardia