Agency and self Flashcards
What is Agency ?
Agency is loss of internal control
this can be more physical
and more mental
Somatophrenia
denial of ones limb or body part assoicated with RH and pareital dysfunction
Moro
plegic hand, right-fronto-parietal lesion
single case study..
Gondola review
patients with SP showed lesion pattern of sub-cortical regions, thalaus, basial gaglia, amygdala, more complex picture…
But spence et al
looked at passivity symtpoms–> so thoughts and actions that arent your own, focused more on actions… and found those patients with schizophrenia had right parietal lobe anormalities.. consistent… potential biological mechanisms
Alien hand syndrome
when you loose control of your hand, feeling of foreignness
Marey and Lopez
patient with right infarct –> consitent with ideas about RH reduced sense of familaritty
Cortical-basal degeneration
sometimes displays signs of alein hand syndrome, maybe something to do with basalganglia dysfunction??
got to remeber this is psychiatric phenomena, evidence showing that it seems to have a neurological basis.
summary of agency according to physical loss of internal control..
disruption in agency by help from neurlogical findings seems to have an association with pariteal lobe and RH dysfunction
Seek
EEG, implants of electrodes Temporoal lobe epilepsey–> psychosis
–> driving forces, left temporal lobe deficits
Shenton
thought disorder in schizphrenia, left temporal lobe abnormalites … shows how psychiatric phemomena linked behaviour to brain dysfunction
Hersh, 2012
SPECT pharmaco-resistant TLE, psychosis
thought she was being ruled by aliens
thought she was her dead uncle
–> left temporal lobe abnormalties
The self
deficits in self processing
body perceptions, thoughts, physical self
Autoscopy
Autoscopy is the experience in which an individual perceives the surrounding environment from a different perspective, from a position outside of his or her own body
Blanke 2000
reduiplcation phenomena, TLE
had to find parts of the brain needed to save
operating as epilesey so bad
—> when activation of TPJ expereiences of autoscopy
depersonalisation
a state in which one’s thoughts and feelings seem unreal or not to belong to oneself.
Simeon et al, 2000
DP experienced metabolic abnormalities posteiror cortex and influence of TPJ –> link to autoposy physical self
Adaptive mechnism–> detacchment from the self
found in patients with extreme life expeierinces
blunted emotional response
Sierra and david –> fronto-limbic suppression mechnism, FL activation, and decrease in insular, limbic related areas
Maybe DP is not to do with the physical self???
DP as a defcit to the vestibular system
caloric irrigation thought to evoke DP feelings
-found greater in vetibular disease group
-but frequency and quality of DP is significantly different
-Dp feeling thought to have arisen distorted vestibular signals mismatch with other sensory input that create this feeling
Distortions in physical self–> Carey
Body dysmophic disorders, relative pareital + occipital diffusions, perfucsion defcits found in brain areas related to body processing, again see psychiatric phenomena.. but no control group
Body dysmoprhic disorder–> fronto-temporal atrophy
Gabbay et al 2003
the vestibular system
The Vestibular System, which is a contributor to our balance system and our sense of spatial orientation, is the sensory system that provides the dominant input about movement and equilibrioception. Vestibular sense provides information related to movement and head position
