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Blood­Brain Barrier

The barrier is ineffective against fats, fatty acids, oxygen, and carbon dioxide, and other fat­soluble molecules that diffuse easily through all plasma membranes

This explains why bloodborne alcohol, nicotine, and anesthetics can affect the brain

The barrier is not completely uniform and not completely developed in infants

Homeostatic Imbalances

Traumatic Brain Injuries

Concussion / Contusion

Cerebrovascular Accidents

Strokes / Transient ischemic attacks

Degenerative Brain Diseases

Alzheimer’s Disease / Ach deficits

Parkinson’s Disease / Degeneration of the substantia nigra

Huntington’s Disease / Degeneration of the basal nuclei

The Brain

End of this section Chapter 12 Continues

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