I. INTRODUCTION
II. OVERVIEW OF GRAPH NEURAL NETWORKS
A. Spatial GNNs
B. Spectral GNNs
III. SURVEY RESULTS
IV. DEFINITION OF BRAIN GRAPH STRUCTURE
V. NODE FEATURE DEFINITIONS
VI. TYPE OF GRAPH CONVOLUTIONAL LAYER
VII. NODE POOLING MECHANISMS
VIII. FROM NODE EMBEDDINGS TO GRAPH EMBEDDING
IX. DISCUSSION
A. Limitations of Surveyed Papers
B. Future Directions
C. Limitations of Our Survey
X. CONCLUSION