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As You Like It: A case study of damage to the anterior cingulate cortex

Olsen, Sidsel Kaald
Master thesis
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Hovedoppgave - Sidsel Kaald Olsen (Locked)
URI
http://hdl.handle.net/11250/282540
Date
2014
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  • Institutt for psykologi [1569]
Abstract
Apathy is a frequent and debilitating consequence of traumatic brain injury associated

with damage to the frontostriatal circuits involving the anterior cingulate. The patient

examined sustained a severe traumatic brain injury with frontal contusions and

extensive damage to the cingulate. After his injury, he showed a strong reduction in

goal-directed behaviour in addition to emotional flatness and a cognitive profile

characterized by problems with attention, psychomotor speed and executive function.

Damage to the anterior cortex appears to affect the brain’s ability to sustain and

concentrate effort in goal pursuit, disconnecting the individual’s perceptions of

reward possibilities in the environment to mechanisms of implementation and arousal.

The patient’s symptoms are interpreted as reflecting missing anterior cingulate input

that would normally serve to sustain concentration and assign effort, as well as adjust

arousal and thus emotional variance; this “effort” network of the brain, when disabled,

leaves the executive network without input and the emotional system without a means

of output. Classification systems, theories, and studies of the neuropsychological

consequences of apathy are reviewed, and implications of this study for future

research is discussed.
Publisher
NTNU

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