Somatic Hallucinations

Question 1

Bar et al

Answer 1

Schizophrenia with SH (itch) = activity in SS cortex when shouldn’t be

Question 2

Kim

Answer 2

Post-stroke pain or paresthesia after cortical or subcortical lesions. Activity not just in SS cortex, also in subcortical areas (e.g. basal ganglia)

Question 3

Lo and Williams

Answer 3

Paresthesia in fingertips of L hand = lesion in RH SS area

Question 4

Bakheit and Roundhill

Answer 4

Stroke affecting R thalamus = 3rd phantom leg (contralateral). Disconnection of parietal lobe via thalamic lesion?

Question 5

Hari et al

Answer 5

Infarction of R frontal lobe = 3rd phantom hand but no control over it. L SS cortex activity suppressed when perceive 3rd arm. Pre motor cortex cannot link back to primary motor cortex to carry out action = disconnection of info transfer via corpus callosum?

Question 6

Moro et al

Answer 6

R fronto-temporo-parietal lesion. 3rd arm on L side and disownership of plegic arm

Question 7

Loetscher et al

Answer 7

R cortical and sub-cortical lesion WITHOUT hemiplegia. Tumour removed from R temporo-parietal region = fight with L leg

Question 8

Mary-Lopez et al

Answer 8

R thalamic infarct = L alien hand

Question 9

Biran et al

Answer 9

L fronto-mesial lesion extending into rostrum and splenium of corpus callosum = R alien hand

Question 10

Biran et al theory

Answer 10

Alien hand result of disinhibited motor function. Most have 2 lesions in common = corpus callosum and meso-frontal lobe. Where in corpus callosum determines specific form of alien hand syndrome.