How The Father Of Neuroscience Used The Power Of Illustration
Santiago Ramón y Cajal (1852–1934) is the father of modern neuroscience.![]()
Most scientists of the time believed the brain was a continuous, interconnected network. Cajal argued that the brain was composed of individual cells: neurons. In the 1950’s, high-resolution electron microscopes proved him right.![]()
Why would someone like me, an illustrator, be interested in Señor Cajal?![]()
Because he was also a wonderful artist (he studied art before attending medical school).![]()
During his lifetime, he created more than 2900 drawings of the brain and other nerve tissue. Some of them are still used in textbooks. His work was the subject of a major exhibition last year.![]()
Here are some examples. Click on the composite below to see a larger version. On a personal note, I loved seeing the early “white-out” he used to correct his mistakes.![]()
Cajal taught himself photography and made carefully posed self-portraits throughout his life.![]()
Here he is in his lab, in his mid-thirties, circa 1885. He’s definitely putting out that moody artist vibe… 😊![]()

Cajal used a microscope for his observations, and cross-hatching, dots, ink washes, and occasionally watercolor for his drawings.![]()
Here’s his 1904 drawing of cells in the retina of the eye:![]()

I write these posts to demonstrate the power and appeal of illustration to prospective clients– how does Cajal’s work fit into that?![]()
Because it makes this very important point:![]()
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Working freehand, Cajal summarized what he saw under the microscope rather than making an exact copy. In a single sketch, he combined observations he made at different times, using different methods. He did this to illustrate a larger hypothesis, rather than just copying what he saw.![]()
In other words, he did what every good illustrator tries to do: to render a fuller reality or “truth”– one that a photograph can’t fully capture.![]()
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Here’s an electron microscopy of the retina next to Cajal’s sketch. The photo is colorful, precise, literal, passive.![]()
Cajal’s sketch has energy; it’s telling a story, emphasizing certain points, making connections. It’s trying to convey a truth that goes beyond a mere photographic record.![]()
That’s the value you get with a custom illustration: it fits
your brand, and speaks your truth: what it is that makes you different: a brand worth choosing.
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About Mark: I’m an illustrator specializing in humor, branding, social media, and content marketing. My images are different, like your brand needs to be.![]()
You can view my portfolio, and connect with me on Twitter, Facebook, and LinkedIn.![]()
Questions? Send me an email.![]()


















































































































































































































