A rare phenomenon in which a patient can see all of the visual field binocularly but somehow ignores objects on one side (e.g. patient may draw a diagram omitting one side or shave only one side of the face). It is due to a lesion of the brain (e.g. a stroke), most often in...
The receptive field of a visual neuron was classically defined as “the region of the retina which must be illuminated in order to obtain a response”28. I predict Dm3 receptive fields by mapping their input connections from Tm1, a cell type that is in one-to-one correspondence with the ...
This information is critical to understanding how a visual field deficit occurs after brain injury. After passing the point of the optic chiasm, most of the axons forming the optic tract course to the lateral geniculate body, which is a small swelling located under the pulvinar of the thalamus...
For example, one set of studies used wide-field changes of luminance from 10 to 40 cd/m2 during a visual oddball paradigm and found deficits in both theta and delta power already in the MCI state, whereas evoked delta amplitude showed a deficit only in AD and correlated with neuropsychologica...
There is a special setting in the 'Nodes' section of the property panel to show in the top-label the percentage deficit (delta) of the outgoing edges. This will override any field set for the top-label. Note that if the outgoing values exceed 100% the shown deficit will be negative. ...
The majority of individuals with Down syndrome (DS) do not exhibit accurate accommodation, with the aetiology of this deficit unknown. This study examines the mechanism underlying hypoaccommodation in DS by simultaneously investigating the ‘near triad’
Today’s technology advances can help visually impaired people (VIP) in different ways such as going to school, finding jobs, and successfully performing daily activities of living. Low-vision rehabilitation aids can be categorised into two groups [10]: (i) visual field deficit aids and (ii)...
Post-operative visual field status was improved in 15.8% of patients, stable in 21.1%, stable deficit in 10.6%, worsened in 5.3%, and not reported for the remaining cases. Discussion Spheno-orbital meningiomas are rare tumors that commonly present with visual impairment and proptosis [5,6,7,...
(see Materials and Methods) that can be considered a substrate of the centre-surround receptive-field structure55, and the perceived orientation of the target is obtained by vector average decoding of the central hypercolumn activities56. The presence of a surround globally decreases the maximum ...
Jacobian modulation maps computed from the DARTEL deformation field were applied to gray matter maps to produce gray matter volume maps. SPM12 was used to perform ANCOVA analysis on the haplotype groups, controlling for age, sex, and total brain size. Results referring to small volume correction ...