2,007 reputation
519
bio website github.com/yamad
location Boston, MA
age 29
visits member for 2 years, 8 months
seen Mar 25 at 15:52

PhD candidate in neurobiology/neuroscience. Current research focused on membrane electrophysiology.


Jan
27
revised What is meant in biology by the term “evolved”?
added 15 characters in body
Jan
27
revised What is meant in biology by the term “evolved”?
added 14 characters in body
Jan
27
comment What are the constraints when growing an artificial brain?
A term from counting bacterial colonies comes to mind as an answer to this question: TNTC (too numerous to count).
Jan
27
answered What is meant in biology by the term “evolved”?
Jan
23
answered How and where, in the human brain, are memories stored?
Jan
23
comment Is it correct that the body only responds to the most painful stimulus?
I mostly interested if the postulate has ever been shown to be true in any case. Of course, I would also be interested if it happens to be applicable to the case of pain perception.
Jan
23
comment Is it correct that the body only responds to the most painful stimulus?
Is there any evidence that Ukhtomsky's postulate actually occurs?
Jan
21
comment Are there neurons that can sense light shining in your ears?
The study I think you are referring to appeared to find that shining light on the back of the knee could entrain a human's circadian clock (Campbell and Murphy, 1998). That study has been refuted by a later study (Wright and Czeisler, 2002, see comment by Baringa, 2002). Wright and Czeisler show no response to light behind the knees. Current consensus is that mammalian photosensitivity resides only in the eyes.
Jan
20
comment How do dopamine agonists like amphetamine/methylphenidate affect acetylcholine signalling?
In its current form, this question can be answered in one sentence by a simple Google search. Can you be more specific and expand your question?
Jan
18
revised Are there neurons that can sense light shining in your ears?
added 320 characters in body
Jan
18
comment Are there neurons that can sense light shining in your ears?
Can you provide a reference for a case in which a TRP channel, commonly thought of as a temperature detector, is plausibly used as a light sensor?
Jan
18
answered Are there neurons that can sense light shining in your ears?
Jan
17
comment A good book for history of biology/biotechnology for lay people
@GerganaVandova, I understand. But isn't the critical question how good this book is? I'm interested to know if any of the upvotes know more about this book and could give their thoughts.
Jan
17
comment A good book for history of biology/biotechnology for lay people
I don't think the accepted answer should be a book that no one has actually read. I appreciate the "flipping through" that was done, but can anyone who has read the full book weigh in? If not, I'm uncomfortable that the community's best recommendation is based on a skim of the first chapter on Amazon.
Jan
11
comment Why are amino acids in biology homochiral?
It's no answer, but Radiolab had a great discussion of chirality and the issue you've brought up. Worth a listen: radiolab.org/2011/apr/18/mirror-mirror
Jan
9
comment Life without DNA?
@KatieBanks, this is not my field so those interested should read the 8 critiques. One main criticism, though, is that their As+/P- medium has sufficient trace phosphorus to support the growth they attribute to arsenic incorporation. The authors argue that their As-/P- control, which shows no growth at all, indicates that it isn't just trace P supporting growth. This is a good point, but this still doesn't really require an interpretation that As is incorporated into the DNA. Their other data has also been criticized for insufficient purity in their samples/preps.
Jan
5
awarded  Commentator
Jan
5
comment Is “exhaustion” of the Hodgkin-Huxley membrane at constant stimulation a real phenomenon?
From my point of view, whether or not this phenomenon requires non-physiological input to the cell is not relevant to the question. This is not an artifact of the model. In fact, the model predicts the behavior of a real neuron.
Jan
4
comment How do the brain and nerves create electrical pulses?
In the answer above, I simplify and say that the resting membrane potential is the potassium equilibrium potential. This is generally not the case, with most resting potentials sitting somewhat more positive indicating the involvement of more ions/channels than just potassium. Yes, resting potentials do vary between cells. I take -70mV or -60mV as my "rule of thumb" resting potential because it generally holds for many primary excitatory neurons such as hippocampal and cortical pyramidal neurons.
Jan
4
answered Is “exhaustion” of the Hodgkin-Huxley membrane at constant stimulation a real phenomenon?