motor and sensory cortical homunculus

Last June, I studied and drew out a small image of the motor and sensory cortical homunculus.  I’ve wanted to come back to it.

I organize materials and prep a 42×42″ canvas this weekend (now I wish I’d gone bigger).

Consider the somatosensory homunculus a neurological layout, mapping areas within the brain that process the various parts of your entire body. Isn’t the human brain and all that it coordinates (you and me) incredible?!!

I touch my head trying to locate the exact spot where my hands connect while picking up my brush and painting detail. The deep center of the sensory strips come to mind as I run. And while doing Nadi shodhana (alternate nostril breathing) in Yoga class, I trust I find balance within and without the body (internal left side of the brain influences external right side of the body, while internal right side influences external left).

The human brain is designed for movement, thought to action…

Cortical Homunculus – in process

I am brain and body.
I am sender and receiver.
I am neuron and synapse.
I am inside and outside.
Moving in space and standing still.
I am.


I see your beautiful brain…

© All Rights Reserved by Monica Aissa Martinez

cortical homunculus

This last week artist friend Tim, who has an undergrad degree in Neurobiology, sends me an image of a figure. Cortical homunculus, thought you mike like it, he writes.  He explains…a map of the nerve receptors in the brain as related to scale on the body. I know the 2D version of this 3D form and immediately  make the connection.

Cortical homunculus! Why didn’t I ever look closer and why didn’t I note the cool name (words always pull me)?  Homunculus is Latin for little man, add cortical and you have a cortex man (a man in the brain!). The depiction basically represent a map of the body, more specific, nerve fibers from the spinal cord, that end at various points in the parietal lobe formulating a map of the body. I see mostly male (it is a little man, after all) though I do find female representations.

Initiated by Dr. Wilder Penfield who envisioned an imaginary world in which a homunculi (a very small humanoid form) lived. He and his colleagues set up experiments to produce a topographical brain map and a corresponding homunculi.

I enjoy working out the composition and now that I understand, I plan to draw more of them. No doubt, my versions will include the female in the brain!

I label as best I can considering the space I set up before I know all that I will include. One side of the homunculus maps the sensory nerves, while the other side maps motor nerves. ↓

Sensory Cortex (sensory body map)

Motor Cortex (motor body map)

Scheduled to facilitate an adult workshop in mid July, for my artist-in-residency, I now consider the color, line and text of the Cortical homunculus.