Emotional conversations in Parkinson's disease.
OBJECTIVE
To learn how PD influences verbal description of emotional events.


BACKGROUND
Individuals with PD exhibit emotional processing deficits. Emotional experience likely involves several dimensions (e.g., valence, arousal, motor activation) subserved by a distributed modular network involving cortical, limbic, basal ganglia, diencephalic, and mesencephalic regions. Although the neurodegeneration in PD likely affects components in this network, little is known about how PD influences emotional processing. Because PD is associated with activation deficits, one could predict that the discourse of emotional experiences involving high activation would be reduced in patients with PD compared to control subjects. Alternatively, because patients with PD exhibit paradoxical sensitivity to externally evoked motor activation (kinesia paradoxica), it is possible that emotional stimuli may facilitate verbal emotional expression more so in patients with PD than in control subjects.


METHODS
The authors measured verbal descriptions of personal emotional experiences in subjects with PD and normal controls.


RESULTS
Compared with control subjects, individuals with PD showed a relative increase in the number of words spoken and in discourse duration when talking about emotional experiences that are usually associated with high levels of arousal and motor activation. Although the authors did not measure arousal or activation, prior research has shown that, when asked to recall an emotional experience, people will often re-experience the emotion previously experienced during that episode.


CONCLUSIONS
Recalling emotional episodes induces verbal kinesia paradoxica in patients with PD. Although recall of these emotional episodes may have been associated with increased arousal and activation, the mechanism underlying emotional verbal kinesia paradoxica is unclear.
Crucian
G P
GP
Department of Neurology, University of Florida, Gainesville 32610, USA. crucigp@neurology.ufl.edu
Huang
L
L
Barrett
A M
AM
Schwartz
R L
RL
Cibula
J E
JE
Anderson
J M
JM
Triggs
W J
WJ
Bowers
D
D
Friedman
W A
WA
Greer
M
M
Heilman
K M
KM
D000368:Aged; D004644:Emotions / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D010300:Parkinson Disease / Q000503:physiopathology / Q000523:psychology*; D011569:Psychiatric Status Rating Scales; D013060:Speech / Q000502:physiology*