Related Experiment Videos
Dog phobia in a motion-blind patient
O Blanke1, V Vaclavik, T Landis
1Department of Neurology, University Hospital of Geneva, Switzerland. olaf.blanke@hcuge.ch
Cognitive Neuropsychiatry
|March 31, 2006
Summary
Specific phobia may stem from a disconnect between brain fear responses. This case study suggests cortical-level dissociation, impacting visual processing, could also cause irrational fear.
Area of Science:
- Neuroscience
- Neuropsychology
- Ophthalmology
Background:
- A neurophysiological model proposes phobia arises from uncoupled subcortical and cortical fear responses.
- This model explains the irrationality of specific phobias, as only the cortical pathway informs awareness.
Purpose of the Study:
- To investigate the neurophysiological underpinnings of specific phobia.
- To explore the role of cortical processing in phobia generation.
Main Methods:
- Reported neuropsychological and neuro-ophthalmological findings in a patient with bilateral parietal lobe damage.
- Assessed visual motion perception, spatial vision, and awareness of deficits.
Main Results:
- The patient exhibited severe visual motion blindness (akinetopsia) and spatial vision deficits.
- The patient was largely unaware of these significant visual impairments.
Conclusions:
- Specific phobia's irrationality may involve cortical-level dissociation, not just subcortical-cortical uncoupling.
- Damage to parietal lobes and resulting visual processing deficits may contribute to phobic responses.