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Survival, danger perception and the amygdala
KTH, School of Technology and Health (STH).
2013 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Fear is an emotion expressed by a subject which is under a threat or danger to secure itself.  It causes the “Fight or Flight” sensation in the being which is under attack. In previous studies, it is found that amygdala is the central unit in brain for fear stimuli. Here we have done two different neuroscience studies on fear with ultra high field MRI.

Case 1: With ultra high field MRI brain images we visualised that there is a faster and short pathway to amygdala. Fear stimuli activate the amygdale even when the images are shown for a very short time of 50ms with which conscious recognition is not possible. This shows brain reacts to fear even before we recognise it consciously.

Case 2: We investigated the influence of low and high spatial frequency fearful images in amygdala because of the contradiction in some previous studies. We compared low, high and broad spatial frequency images of fearful averted gaze faces, snakes and objects and found both high and low spatial frequency fear images affect the amygdale in the similar manner.

Place, publisher, year, edition, pages
2013. , p. 41
Series
TRITA-STH ; 2013:13
National Category
Medical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-119586OAI: oai:DiVA.org:kth-119586DiVA, id: diva2:611732
External cooperation
CIBM, ÉCOLE POLYTECHNIQUE FÉDÉRALE DE LAUSANNE (EPFL)
Subject / course
Medical Engineering
Educational program
Master of Science -Medical Imaging
Uppsok
Technology
Supervisors
Examiners
Available from: 2019-09-11 Created: 2013-03-18 Last updated: 2019-09-11Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf