My Musings

Currently Lacking a Muse

Two churches located across the street from each other. At least the Catholics have a sense of humor.

elizards:

paranoidrobot:

imageimageimageimageimageimageimageimageimage

Posted on 27 July, 2013
Reblogged from geekytherapist  

when my friend asks if i’m going to black out to celebrate the end of the semester

lifeofadocstudent:

Posted on 21 July, 2013
Reblogged from lifeofadocstudent-deactivated20  

When a professor assigns us a project that we reasonably cannot complete before the end of the semester:

keepcalmandpsychoanalyze:

Posted on 19 July, 2013
Reblogged from keepcalmandpsychoanalyze  

coding rorschachs

lifeofadocstudent:

image

Posted on 20 June, 2013
Reblogged from lifeofadocstudent-deactivated20  

"At fifteen you had the radiance of early morning, at twenty you will begin to have the melancholy brilliance of the moon."

—  F. Scott Fitzgerald, This Side of Paradise (1920)

Posted on 3 June, 2013
Reblogged from yerawizardmarydgsfsdf-deactivat  Source themethodtohermadness

Posted on 2 June, 2013
Reblogged from yerawizardmarydgsfsdf-deactivat  Source praises

The Man With Uncrossed Eyes

neuroticthought:

“GB” is a 28 year old man with a curious condition: his optic nerves are in the wrong place.

Most people have an optic chiasm, a crossroads where half of the signals from each eye cross over the midline, in such a way that each half of the brain gets information from one side of space. GB, however, was born with achiasma – the absence of this crossover. It’s an extremely rare disorder in humans, although it’s more common in some breeds of animals, such as Belgian sheepdogs.

Here’s GB and a normal brain for comparison:

Canadian neurologists Davies-Thompson and colleagues describe GB in a new paper using functional neuroimaging to work out how his brain is organized.

In the absence of a left-right crossover, all of the signals from GB’s left eye end up in his left visual cortex, and vice versa. But the question was, how does the brain make sense of it? Normally, remember, each half of the cortex corresponds to half our visual field. But in GB’s brain, each half has to cope with the wholevisual field – twice as much space (even though it’s getting no more signals than normal.)

It turns out that the two halves of space overlap in GB’s visual cortex, as these fMRI results show:

The four colours represent the four quarters of the visual field, and the brain blobs that light up in response to them. Although the bottom and the top of space are separately represented, as they normally are, there’s complete overlap between the areas that respond to bottom-left and bottom-right stimulation, and likewise top-left and top-right. It’s possible that they are separately represented at a smaller scale, however.

Despite this, GB’s vision was remarkably good – he scored around 20/80 vision, one quarter as accurate as a typical person.

This is a fascinating case report, and vision neuroscientists will find much to ponder here. Still, what I’d love to know is how does it feel to have overlapping representations of the two sides of space? Does everything seem to be mirrored vertically? Does GB find it easier to tell objects apart when they’re above and below the other, compared to side-to-side?

Davies-Thompson, J., Scheel, M., Jane Lanyon, L., & Sinclair Barton, J. (2013). Functional organisation of visual pathways in a patient with no optic chiasm Neuropsychologia DOI:10.1016/j.neuropsychologia.2013.03.014

Posted on 1 June, 2013
Reblogged from psychologygeek  Source neuroticthought

psychologygeek:

scinerds:

Thanks to Stanford University’s aptly named Clarity, scientists are now able to scan the brain for unobstructed views of neurons and their connections. In this scan, aided by a green fluorescent protein, one is able to see the axonal and dendritic branches of neurons within the hippocampus.

Whenever I see cool new non-invasive neuroimaging tech I get super envious of the person who got to be the participant in that study. I want to see my neurons :(

So cool

Posted on 1 June, 2013
Reblogged from psychologygeek  Source The New York Times

Posted on 1 June, 2013
Reblogged from psychologygeek  Source sorelliena

Posted on 29 May, 2013
Reblogged from yerawizardmarydgsfsdf-deactivat  Source ruineshumaines


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