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BYB Needs You! Seeking Neuroscience Experiment Intern

Neuroscience Experiment Intern Wanted
(Downtown Ann Arbor)

Compensation: $15/hr based on 40-hour work week
Employment type: full-time internship

Backyard Brains is seeking a neuroscience intern to continue ongoing experiments!

You:
-A STEM undergrad, currently taking a break from the classroom. (Recent grad or gap year preferable)
-Passionate about scientific discovery and designing innovative, impactful experiments
-Experienced in or excited by a future of scientific outreach
-Able to guide a project through every step and take initiative when help is needed
-Looking forward to being a Neuroscience ambassador!
-Living in the Ann Arbor area

The Job:
-Develop and run experiments in ongoing research projects that were started during our summer fellowships
-Originate accessible experiment write-ups for use in BYB content channels
-Short-term internship; can last 3-6 months, depending on availability and project.
-Work in our Ann Arbor office during normal business hours (no parking on-site)

Our experiments have been featured in 9 TED talks and numerous popular science TV shows, such as White Rabbit Project and Bill Nye Saves The World. Your work will provide a basis for further research and even be included in peer-reviewed journal articles (authorship!).

To apply:
Please send your CV and cover letter including your research experience (if any) to hello@backyardbrains.com. Tell us why you are interested in applying for an internship at BYB!

We Are:
Backyard Brains is a DIY Neuroscience company devoted to bringing the brain to everyone! Because everyone has a brain, that complex but extremely fascinating puppet master of the body. We need more people interested in studying the brain because 20% of the world will have a neurological disorder… and there are no cures! Historically, you need to be a graduate student with funding at a major university to study the brain, but not any more! Backyard Brains wants to help everyone be a neuroscientist! We provide affordable neuroscience experiment kits for students of all ages to learn (hands-on) about electrophysiology. Now everyone from schoolchildren to grad students and every grade in between can experiment with similar tools used by real neuroscientists worldwide! What will you discover?


Getting Started with the Muscle SpikerShield Pro

Hey everyone! I’m Pablo, a junior from Nido de Aguilas High School in Santiago, Chile. In my free time, I like to doodle and run.

My project is a multi-channel version of the experiment that my colleague and friend Cristian developed: it consists of using the SpikerShield Pro’s ability to get data from multiple channels to create a musical instrument. In this instrument, flexing a muscle is analogous to playing a key in a keyboard. Obviously, the amount of channels limits this keyboard to six notes, but according to my limited musical knowledge, this is enough to create a coherent melody. In fact, the Arduino program currently has four settings which can be accessed using the red button: Mary Had a Little Lamb, Frere Jacques, major pentatonic scale and the minor blues scale. All the notes are in arrays with six elements, each corresponding to a channel. To add more possibilities, holding the white button in the board makes all the notes in the current setting one octave higher. You can download my code here.

The “loop” part of the code works by reading the red button, white button, and all six channels. First, it decides which set of notes to use for that iteration of the loop, which is controlled by the red button, then it checks if the white button has been clicked, which affects the pitch of the final note it plays. The last step is to decide which tone to actually play, which the code does by selecting the largest reading of all the muscles. Now, you might be thinking that playing music with two vastly different muscles, say your forehead and your forearm, will never work because a signal from the forearm will always be bigger than the signal of even the strongest forehead flex. However, the SpikerShield Pro can control the gain from each individual channel (the little white knobs) which can make a channel more or less sensitive to a signal, so every muscle has a fair chance of being played.

One challenge I faced when I developed this project is the lack of documentation of this particular product for novice programmers. Most of the times I’ve played around with an Arduino, I’ve relied extensively on the built-in tutorials and online resources, but this time I only had the board’s schematic, which at first glance bears a closer resemblance to black spaghetti than a discernible circuit and the default program which sends the signals from the board to Spike Recorder. Running the aforementioned program was not a challenge, but reading the code, not being fully aware of what it was, proved to be confusing. I only started making progress once Tim Marzullo showed me an outdated sketch meant for this shield. However, with this project in the open, I doubt this is a problem other users will face; the heart of the code — presenting the sensor’s readings as an array and mapping those raw values to a usable scale — can be used for most projects.

The second biggest challenge was and still is, my absolute ignorance about music theory. I never learned to play an instrument, and the most complicated song I managed to play is “Hot Crossed Buns”, though that is probably a skill I’ve lost. I’ve always enjoyed music, but much like hot dogs, I preferred to enjoy the finished product rather than learning how it is made. After adding the melody of Mary Had a Little Lamb and Frere Jacques, I did not know what other songs to add. After a fair amount of research, I came upon pentatonic scales, which are comprised of five notes.

Though the musical aspect is worth examining, what attracted me more is its role in many musical traditions, ranging from the ancient Greeks to the Andes. During the 19th century, composers like Debussy used the simplicity of the scale to create a folksy in their composition, resulting in music like La fille aux cheveux de lin. Later on, rock, blues, and jazz artists adopted the scale as a tool for their respective styles of improvisation. I think this is the area where my particular instrument shows the most potential because it is only capable of playing one note at a time, and also because flexing muscles to create sound is very intuitive. However, this is a hypothesis I will let the reader confirm.


Intracellular recording in Snails Final Update – Juan Ferrada

Hi Everyone. Juan here! My two month tour with Backyard Brains has reached its end, and I’m really grateful to have had the opportunity to work on this project.

I had three activites during the “practica” here at Backyard Brains:

  • Recording from the Ganglia of Snails
  • Helping on the Anemone Project
  • Assisting in Outreach.

The snail recording was my main project at 70% of my time, the anemona project occupied about 10% of my time, and the high school outreach was 20%.

Recording from Snails.

The original aim was to record the intracellular action potential of pacemaker-like cells from the parietal ganglia of Helix aspersa, using Backyard Brains hardware for the optics, acquisition and amplification. From the last blog post you can see that we had no problem with dissecting the ganglia or visualizing the neurons with hand pulled pipettes in the microscope, but we couldn’t get any recordings. Recording electrical activity from the leg of the cockroach is different from the ganglia of the snail. Because of the dry environment of the cockroach leg and the strong signal from the leg nerves, the cockroach leg nerve activity is very easy to record. Buuuuut with the snail, we have a really weak signal in a conductive aqueous salt solution, so we must take a different approach to the experiment, as repeated attempts at the BYB lab did not yield results.

Sooo we went to familiar ground (for me) and replicated the experiment with lab equipment from the Laboratorio de Neurociencias at the University of Santiago (Usach). We had divine intervention from Darwin Contreras, a PhD student who just that day had successfully defended his Ph.D. and happened to only be coming back to the lab to get his motorcycle helmet to go motor on home and relax with his growing family. Using a large Faraday cage, a dissection scope, and a high end manipulator (but yes, a Backyard Brains Neuron SpikerBox Pro), we carefully inserted an insulated  blunt tip silver wire into the ganglia.

 

And we listened to the low background noise coming out from the speaker of the SpikerBox. But….Every now and then there was a rattle, sparse and random enough to not be an artifact, so we recorded it and to the surprise of everyone there it was, spontaneous, asynchronous action potentials. Success!

We witnessed high amplitude spiking (download the raw data if you like!).

And we also witnessed the rhythmic “neuron dying” response.

 

But this was only a partial success, as it was 1) our only successful recording, and 2) made extracellularly instead of intracellularly. We found a shorter electrode, to prevent the antenna effect, and a faraday cage minimized the noise profile, but we are still far away from the original goal, recording intracellularly from the large neurons in the parietal ganglion.

At the moment, we may seek another preparation for intracellular single unit recording, as the snail preparation is a bit tricky. We may go to the intracellular recordings of the muscles of the tail of the crayfish, or perhaps try another mollusk, say a “macha,” a type of clam very common along the Chilean and Peruvian coast, that we looooovvveeee to eat.

Recording from the Nervous System of Anemones

We continue in the long term project to record from sea anemones. We built a harpoon style electrode…

 

but the silver wire wasn’t strong enough to pierce the membrane of the oral disc of the anemone. We had heard that there are more neurons around the oral disc (which, in an anemone, serves as its mouth, anus, and reproductive orifice). We will try tungsten next, which is the classic, strong material for small metal electrodes.

But….we had the idea that maybe we could remove the tentacles, like we remove the leg of the cockroach, and attempt a recording in a more controlled environment under a microscope. To our surprise, the tentacles kept moving for an hour  after we had cut them! We may be on to a new preparation, it is very fascinating to watch. Very primordial success, yet waiting, yet to come. See our video below.

We then inserted an insulated blunt tip silver wire into the open end of the tentacle and tried to see if we could measure spontaneous activity or evoked activity (when we touched the tentacle with a probe).

 

But….we did not get any successful neuron recordings. We are sure there is something here though, there have got to be neurons inside the tentacle. The tentacle is moving, and neurons must be talking to the muscles. The neurons in the anemone tentacle are arranged like sheets between rings of muscle, so it’s a matter of optimizing the preparation. We are always getting closer to the elusive anemone neurophysiology, stay tuned.

Outreach

During the last part of May we taught the students how to build a two stage amplifier circuit from a breadboard, and the students can now recognize the logic of how to manage components like resistors, capacitors, and transistors.

During the last two classes I helped teach about the difference between reactions and reflexes using the knee and elbow.

For the last class, we did experiments measuring the difference between audio and visual reaction times. Data collected in a classroom can be noisy. Supposedly auditory reactions are faster than visual reaction times but we did not observe that difference in the students who had well tabulated data. But I always continue in my experiments. I always continue trying to have compelling data that tells an interesting story.

Bye Guys, Now I have to write my thesis! I’ll miss the late night pizza party experiment sessions with Florencia and Tim and the workshops in the Fablab at the high school Colegio Alberto Blest Gana. I will not miss the cardboard-tasting garlic bread  (pizza delivery company to remain anonymous).