NESC 3227 Lecture Notes - Temporal Lobe, Olfaction, Diffusion Mri
17 Apr 2013
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Document Summary
Orbitofrontal frontal injury is common after blunt head injury. The movement associated with hitting your head can cause the shearing of nerve fibres: causing microscopic lesions, in particular in frontal and temporal areas. Anosia had fairly good predictive value of who goes back to work: as the brain goes forward and back it will shear off the olfactory nerves, causing the anosia. Why head injuries create orbitofrontal and anterior temporal lobe damage. There are sharp edges inside the skull that the brain will hit when it moves: possibly causing hematomas. Divergent thinking impaired in these lesion patients. Ways of testing: fluency of speech (left prefrontal) Individual given letter of alphabet, told to write as many words as possible that start with that letter in 5 minutes. Then asked to write as many words that start with a letter but only 4 letters long. Low output and rule breaking in lesions patients: fluency in design (right prefrontal)
