WEDNESDAY, June 23 (HealthDay News) -- Tests that can predict the risk a Parkinson's patient has of falling are outlined in a new study.

(HealthDay News) -- A concussion is a brain injury that's generally caused by a strong blow to the head.

(HealthDay News) -- Stuttering is an interrupted pattern of speech, often characterized by words, letters or syllables being repeated or delayed.

WEDNESDAY, June 23 (HealthDay News) -- Scientists have uncovered new details about brain mechanisms associated with courage.

WEDNESDAY, June 23 (HealthDay News) -- A potential link between diabetes and a heightened risk of heart disease and sudden cardiac death has been spotted by researchers studying mice.

WEDNESDAY, June 23 (HealthDay News) -- If global warming does drive temperatures upward, cities with urban sprawl may be more prone to extreme heat than less spread-out centers, new research suggests.

WEDNESDAY, June 23 (HealthDay News) -- Rates of child abuse in the United States are steady throughout the year and don't increase during the winter, says a new study challenging the widespread belief that there are more cases in the winter months, especially during the holiday season.

WEDNESDAY, June 23 (HealthDay News) -- Underinsured black breast cancer patients have worse survival outcomes than underinsured white patients, a new U.S. study has found.

WEDNESDAY, June 23 (HealthDay News) -- Advanced lung cancer is notoriously hard to treat, but a team of Japanese scientists reports that a cancer drug known as Iressa was significantly more effective than standard chemotherapy for patients with a certain genetic profile.

WEDNESDAY, June 23 (HealthDay News) -- Treatment helped improve sleep quality for U.S. soldiers who suffered from migraine headaches after returning from the war in Iraq, a new study found.

WEDNESDAY, June 23 (HealthDay News) -- Adults who suffer migraines and were victims of childhood abuse or neglect face an increased risk for cardiovascular and cerebrovascular disease, a new study suggests.

TUESDAY, June 22 (HealthDay News) -- Living near a cell phone tower while you're pregnant doesn't raise your baby's risk of developing a childhood cancer, British researchers report.

WEDNESDAY, June 23 (HealthDay News) -- Compared with six other industrialized nations, the United States ranks last when it comes to many measures of quality health care, a new report concludes.

WEDNESDAY, June 23 (HealthDay News) -- This Tuesday and Wednesday, a high-ranking group of expert government advisors is meeting to outline and anticipate potential health risks from the Gulf oil spill -- and find ways to minimize them.

WEDNESDAY, June 23 (HealthDay News) -- Patients with cirrhosis of the liver who suffer acute variceal bleeding have improved chances for survival if a shunt is used earlier rather than later, a new study finds.

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

(HealthDay News) -- Here are the latest clinical trials, courtesy of ClinicalConnection.com:

WEDNESDAY, June 23 (HealthDay News) -- A new report challenges the 2009 recommendation from the U.S. Preventive Services Task Force that women between 40 and 49 who are not at high risk of breast cancer can probably wait to get a mammogram until 50, and even then only need the exam every two years.

WEDNESDAY, June 23 (HealthDay News) -- All those wild and crazy nights may be catching up with swingers as they age, new research found.

WEDNESDAY, June 23 (HealthDay News) -- A new Italian study describes a technique that doctors can use to restore vision to some patients with severe burns to their eyes.