When Greg Dunn finished his Ph.D. in neuroscience at Penn in 2011, he bought himself a sensory deprivation tank as a graduation present. The gift marked a major life transition, from the world of science to a life of meditation and art. Now a full-time artist living in Philadelphia, Dunn says he was inspired in his grad-student days by the spare beauty of neurons treated with certain stains. The Golgi stain, for example, will turn one or two neurons black against a golden background. "It has this Zen quality to it that really appealed to me," Dunn said. What he saw under the microscope reminded him of the uncluttered elegance of bamboo scroll paintings and other forms of Asian art, and he began to paint neurons in a similar style. He supplements traditional brush painting with methods he's developed on his own, such as blowing a drop of ink across a surface. The ink spreads much as a neuron grows, Dunn says, propelled by a natural force, but forming random branches as it finds its way around microscopic obstacles. "I like the concept of drawing on similar forces to produce the art," he said. Dunn has sold commissioned works to research labs and hospitals, and he says his prints are popular with neuroscientists, neurologists, and others with a special interest in the brain, including people with neurodegenerative disorders. "I think it helps them come to terms or appreciate this thing they've been so vexed by," Dunn said. The images in this gallery are drawn from his imagination, but they're informed by his knowledge of neuroanatomy. "One of my frustrations with grad school was the necessity for absolute adherence to truth, and principles, and facts," Dunn said. "I'm inspired by anatomy but not a slave to it." Above: Cortex in Metallic Pastels This painting depicts a cross section of the motor cortex, a region involved in planning movements, illustrating the prominent layer V pyramidal neurons. 21K gold, palladium, mica, enamel, and dye on aluminized panel (2012) (High-resolution version) Image: Greg Dunn

Cerebellum This is the cerebellum, a region of the brain important for movement, balance, and motor memory. 22K gold, dye, and enamel on aluminized panel (2012) (High-resolution version) Image: Greg Dunn

Maki-e Neurons Dunn says there's no real biological description for this one: "It's far less representational of actual anatomy than the others." 22K and 18K gold, dye on aluminized panel (2012) (High-resolution version) Image: Greg Dunn

Developing Cortex This painting shows the developing human cerebral cortex, at about week 15 of gestation. 22K gold, enamel, metal powder, and dye on aluminized panel (2012) (High-resolution version) Image: Greg Dunn

Retina This painting is a sumi-e depiction of the layered structure of the retina. Visual processing starts with the photoreceptors (top) and progresses to the ganglion cells (bottom) before information is sent to the thalamus and visual cortex for further interpretation. Ink on sized xuan, mounted on silk brocade scroll (2011) (High-resolution version) Image: Greg Dunn

Cortex This painting shows the layered structure of the cerebral cortex, where processing of sensory and motor information occurs. Enamel on composition gold leaf (2009) (High-resolution version) Image: Greg Dunn

Hippocampus This painting depicts a cross section of the rodent hippocampus, a brain region utilized in learning and memory. Enamel on composition gold and aluminum leaf (2010) (High-resolution version) Image: Greg Dunn

NG2+ Cells NG2+ cells (yellow gold) are a type of glia, a type of cell that engulfs neural synapses and helps regulate synaptic transmission. They are depicted here among pyramidal cells in the hippocampus (white gold). 22K and 21K gold, dye on metalized panel (2012) (High-resolution version) Image: Greg Dunn

Hypothalamus This is a compressed cross section of the rodent hypothalamus, a brain region involved in appetite, temperature regulation, circadian regulation, and sleep. 22K gold and dye on stainless steel (2012) (High-resolution version) Image: Greg Dunn