From:  Emerging insights in human brain and behavior from intracranial recordings

 Summary of human intracranial studies on reward processing published between 2009 and 2024.

Study informationNumber of studies% of studies
Participants
Epilepsy1066.7%
Depression213.3%
Movement disorders320.0%
Electrophysiological implants
DBS-local field potentials 320.0%
DBS/FSCV-dopamine213.3%
Single units213.3%
Electrocorticography (strips/grid)533.3%
Stereo EEG320.0%
Research questions
Social320.0%
Non-social1280.0%
Behavioral modeling320.0%
No behavioral model1280.0%
Cross-region synchronization213.3%
No synchronization1386.7%
Regions of interest—neocortical
OFC (lateral/medial)7 (3/1)46.7 (20.0/6.7)%
vmPFC/dlPFC/dmPFC4/1/326.7%/6.7%/20%
Frontal pole16.7%
Cingulate cortex16.7%
Amygdala213.3%
Parahippocampal cortex16.7%
Insula320.0%
Supramarginal gyrus16.7%
Angular gyrus16.7%
Pre-supplementary motor area16.7%
Regions of interest—subcortical
Nucleus accumbens16.7%
Ventral striatum16.7%
SNr16.7%
Caudate16.7%
Putamen16.7%
Thalamus16.7%
Hippocampus320.0%

Studies are categorized by participant population, electrophysiological implant type, research question, use of behavioral modeling, cross-region synchronization analysis, and regions of interest. Percentages indicate the proportion of studies within each category. Neocortical and subcortical regions are listed separately. DBS: deep brain stimulation; dlPFC: dorsolateral prefrontal cortex; dmPFC: dorsomedial prefrontal cortex; FSCV: fast-scan cyclic voltammetry; OFC: orbitofrontal cortex; SNr: substantia nigra reticulata; vmPFC: ventromedial prefrontal cortex.