Wednesday, 16 September 2015

Brain Structure - Studies

Protegal (1996)

Direct stimulation of an area of the amygdala in hamsters produces aggressive behaviour. 

Charles Whitman (1966)

Killed 16 people by gunshot from the top of a building and left a note asking to inspect his brain. A tumour was found pressing on his amygdala

Siegel & Pott (1988)

The stimulation of the ventromedial hypothalamus results in spontaneous aggression. 

Phillip Bard (1930s)

Procedure
- Removed the cortex in cats and made them decorticate.

Findings
- Cats became aggressive and exhibited 'sham rage'.
- Arched backs, hissing, growling and bared teeth.

Phineas Gage 

Had his amygdala impaled by a pole working on a railway line and became extremely aggressive.

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