A new study casts old theories about hearing into doubt. Researchers found many cells in the inner ear react simultaneously to low-frequency sounds. This makes it easier for us to hear low-frequency sounds as the brain is able to receive input from many sensory cells at the same time.
Researchers have developed a cornea implant from the collagen protein of pig skin. The implant restored the vision of 20 people with diseased corneas. The new implant could be a viable alternative to human cornea transplantation.
Gene expression in male and female brains becomes more similar due to age, and both sexes contribute to the pattern. If the expression of a gene is higher in younger female brains it tends to be lower in younger male brains. Due to age, the gene expression reduces in females and increases in males, and vice versa.
Researchers have identified several novel functional mechanisms related to the inner hair cells of the ear. The findings may upend numerous longstanding theories about the working anatomical organization and workings of the ear, as well as provide new avenues for the development of technologies to improve hearing.
Microglia appear to play a key role in inflammation-associated depression.
Fatty acid amide hydrolase (FAAH) inhibitors, a form of medication that boosts endocannabinoids, may be helpful in the treatment of PTSD. FAAH inhibition can improve the recall of fear extinction memories. The drugs could also help treat stress and other psychological disorders.