The History of Neuropsychology

14 important questions on The History of Neuropsychology

Who was Vesalius and what did he do?

Most important man in the history of neuropsychology

Even though human dissection was banned by The Apostle's Creed (fear that mutilation would result in the inability of the body to be resurrected), he carried out dissection.

He found:
200+ errors with Galen's anatomy:
- demonstrated that Galen's view on circulation was incorrect - he found all blood vessels originate in the heart. The heart arteries and veins form one cycle
- demonstrated that Galen's view on nerves was incorrect - he found that nerves stem from the brain and transmit sensation and motions commands
- he found that nerves are not hollow

What did Galvini (1737-1798) study?

Studied how neurons work - static electric charge applied to the muscle tissue of dead animal makes the muscle contract

What did Gall propose (1758-1828)?

Phrenology - personality was a result of the shape of the skull
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What did Flourens (1794-1867) find?

Localisation - different parts of the brain have different functions
Cerebellum: coordinated movement
Medulla: basic life functioning
Cerebral hemisphere: higher cognitive function

Tested on animals - if you have a lesion in the brain it will effect behaviour

- he suggested that the amount of tissue damage was important regarding lesions rather than the localisation of different functions. This is wrong, it is localisation that is important. Although the greater the mass of impaired tissue, the more disrupted the behaviour  

Why was Flourens unable to localise specific functions?

- animal brains were too small
- humans & animals are cognitively different e.g. speech
- one area of the brain can effect multiple areas of the body
- impairments weren't tested
- you need specific tests to observe specific changes in behaviour - maybe he didn't have the resources?

Who was Broca's famous patient? What did Broca find?


Patient Tan - had a left hemisphere lesion
= good speech comprehension skills
= impaired speech production skills (he could only say "Tan")

Broca's area
Left frontal lobe
Inferior frontal gyrus

He found: Verbal abilities confined to the left hemisphere = lateralisation
= language is an example of lateralisation

Who was Wernicke? (1848-1905) What did he find?

Studied patients with:
- intact speech production
- deficit in speech comprehension
(opposite of Broca's patients)

Wernicke’s area
Posterior section of superior
Temporal gyrus

What did Wernicke add that we didn't already know from Broca's patient? What do they both show?

Broca = example of single dissociation i.e. Tan could understand speech but not produce it (a fault here would be that maybe speech production is harder than comprehension)
Wernicke = example of double dissociation

= Speech production and comprehension must be separable since either can be damaged in isolation     

What did Brodmann (1909) discover?

There are 52 distinct areas in the brain

What did Hughlings Jackson find (1835-1911)?

He observed the behaviour of brain damaged patients - found it was rare to lose a function entirely

What did Von Monakow find?

Diaschisis - a lesion to one part of the brain can have a knock on effect to another part of the brain - connecting areas can be dysfuctioning even if they look intact

What did Head (1926) discover?

Functional pathways and representational systems

What did Lashley (1890-1958) discover?

Equipotentiality - Each part of the brain has the potential to support more than one function


= A non-damaged area of the brain is capable of recovering the function of the damaged area.  

What did Luria (1902-1977) propose?

The brain must encompass both localisation and equipotentiality.

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