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Effects of reward on spatial working memory in schizophreniaCho, Youngsun T. ...Reward processing and cognition are disrupted in schizophrenia (SCZ), yet how these processes interface is unknown. In SCZ, deficits in reward representation may affect motivated, goal-directed ... behaviors. To test this, we examined the effects of monetary reward on spatial working memory (WM) performance in patients with SCZ. To capture complimentary effects, we tested biophysically grounded computational models of neuropharmacologic manipulations onto a canonical fronto-parietal association cortical microcircuit capable of WM computations. Patients with SCZ (n = 33) and healthy control subjects (HCS; n = 32) performed a spatial WM task with 2 reward manipulations: reward cues presented prior to each trial, or contextually prior to a block of trials. WM performance was compared with cortical circuit models of WM subjected to feed-forward glutamatergic excitation, feed-forward GABAergic inhibition, or recurrent modulation strengthening local connections. Results demonstrated that both groups improved WM performance to reward cues presented prior to each trial (HCS d = - 0.62; SCZ d = 1.0), with percent improvement correlating with baseline WM performance (r = .472, p < .001). However, rewards presented contextually before a block of trials did not improve WM performance in patients with SCZ (d = 0.01). Modeling simulations achieved improved WM precision through strengthened local connections via neuromodulation, or feed-forward inhibition. Taken together, this work demonstrates that patients with SCZ can improve WM performance to short-term, but not longer-term rewards - thus, motivated behaviors may be limited by strength of reward representation. A potential mechanism for transiently improved WM performance may be strengthening of local fronto-parietal microcircuit connections via neuromodulation or feed-forward inhibitory drive.Source: Journal of abnormal psychology. - ISSN 0021-843X (Vol. 127, no. 7, 2018, str. 695-709)Type of material - article, component part ; adult, seriousPublish date - 2018Language - englishCOBISS.SI-ID - 68508002
Author
Cho, Youngsun T. |
Lam, Norman H. |
Starc, Martina |
Santamauro, Nicole |
Savic, Aleksandar |
Diehl, Caroline |
Schleifer, Charles H. |
Moujaes, Flora |
Srihari, Vinod H. |
Repovš, Grega |
Murray, John D., nevroznanstvenik |
Anticevic, Alan
Topics
delovni spomin |
prostorski spomin |
nagrade |
shizofrenija |
shizofrenija |
working memory |
spatial memory |
rewards |
schizophrenia |
neuromodulation |
neuromodulation
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Cho, Youngsun T. | |
Lam, Norman H. | |
Starc, Martina | 33422 |
Santamauro, Nicole | |
Savic, Aleksandar | |
Diehl, Caroline | |
Schleifer, Charles H. | |
Moujaes, Flora | |
Srihari, Vinod H. | |
Repovš, Grega | 17893 |
Murray, John D., nevroznanstvenik | |
Anticevic, Alan |
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