Osteoporosis

According to National Osteoporosis Foundation (2017), bone tissue is alive and growing. It undergoes changes in different life stages. As the bones mature, they gradually replace the 300 soft ones at birth with hard ones (Iofbonehealth.org). Through the years, old …

Hermann Grid’s Review

Ludimar Hermann discovered the Hermann Grid. It was characterized by “ghostlike blobs” at the intersections where a grey grid is displayed on a background of black (Spillmann&Levine 1971). Baumgartner believed this effect is caused by inhibition in retinal neurons called …