(HealthDay News) -- Insomnia is the general term used to mean waking too early, or having difficulty falling asleep or staying asleep.

(HealthDay News) -- Sledding down a slippery slope at home or a nearby field is a past-time that makes kids look forward to winter. But thousands are injured each year in sledding accidents.

WEDNESDAY, Jan. 4 (HealthDay News) -- Families hoping to improve their fitness and overall health in 2012 should spend less time in front of a TV or computer screen and more time being active together, according to the Alliance for a Healthier Generation.

WEDNESDAY, Jan. 4 (HealthDay News) -- People who lack the ability to consider the future consequences of their current actions are more likely to be aggressive when they're drunk, a new study indicates.

WEDNESDAY, Jan. 4 (HealthDay News) -- Arrogant people are less likely than humble people to offer help to someone who needs it, new research finds.

WEDNESDAY, Jan. 4 (HealthDay News) -- New research shows that women with celiac disease face a higher risk for also suffering from depression and so-called "disordered eating," regardless of whether they stick to a gluten-free diet.

WEDNESDAY, Jan. 4 (HealthDay News) -- Physicians need to take care when prescribing seizure medication to HIV/AIDS patients to prevent harmful interactions between drugs, experts warn.

WEDNESDAY, Jan. 4 (HealthDay News) -- Children who are diagnosed with schizophrenia or a number of other psychoses go on to experience a progressively greater than normal loss of gray matter in the frontal lobe region of the brain, new research suggests.

WEDNESDAY, Jan. 4 (HealthDay News) -- Men appear more likely to die from Parkinson's disease than women, Hispanics and Asians with the neurologic disorder, a large U.S. study reveals.

WEDNESDAY, Jan. 4 (HealthDay News) -- Remember those tall, shiny, metal, sliding boards? They seemed dauntingly steep, but you took the plunge and whizzed downward. Next, you tackled the monkey bars, climbing higher and higher and hanging by your knees at the pinnacle.

WEDNESDAY, Jan. 4 (HealthDay News) -- Small but continued drops in cancer incidence and deaths in the United States in recent years are charted in a new report.

WEDNESDAY, Jan. 4 (HealthDay News) -- The birth rate for twins in the United States has jumped by 76 percent since 1980, government health officials reported Wednesday.

Here are some of the latest health and medical news developments, compiled by the editors of HealthDay:

WEDNESDAY, Jan. 4 (HealthDay News) -- A potential vaccine for genital herpes has shown only limited effectiveness in thwarting one type of the sexually transmitted virus and no ability to stop a second type from spreading, a new study shows.

WEDNESDAY, Jan. 4 (HealthDay News) -- Some people with advanced colorectal cancer are resistant to some types of chemotherapy, and a mutation in the so-called TFAP2E gene may play a part in that resistance, German researchers report.

WEDNESDAY, Jan. 4 (HealthDay News) -- A vaccine to protect against the hepatitis C virus, which can cause severe liver damage and even liver cancer, might be possible -- but it's likely years away, researchers are reporting.

WEDNESDAY, Jan. 4 (HealthDay News) -- Worried about the growing threat of antibiotic-resistant microbes in humans, the U.S. Food and Drug Administration on Wednesday curbed the use of certain antibiotics in cattle, pigs and poultry.

WEDNESDAY, Jan. 4 (HealthDay News) -- Nearly one in four girls who gets the human papillomavirus (HPV) vaccine mistakenly thinks that her risk of getting other sexually transmitted diseases is lowered, a new study indicates.