Maintain your brain -- The Baltimore County Department of Aging, in partnership with the Alzheimer's Association, will sponsor free sessions at local senior centers this month. For a list of times and locations, call 410-887-2594.
Type 2 diabetes -- Greater Baltimore Medical Center's Geckle Diabetes & Nutrition Center, 6569 N. Charles St., Physicians' Pavilion East, Suite 507, Towson / Days and times vary. Registration: 443-849-2036.
Walking program -- Honeygo Run Regional Park, off Honeygo Boulevard / 9:30 a.m.-10:30 a.m. Mondays-Fridays. Free. Information: 888-74-OBTLC.
Walking program -- Harbor Hospital, held at the Centre at Glen Burnie, 6711 Ritchie Highway / 8 a.m.-10 a.m. daily. Free. Registration required. 410-350-8255.
Asthma and allergies -- Greater Baltimore Medical Center, Physician's Pavilion East, 6565 N. Charles St. / No-needle allergy testing with results in about 20 minutes. Free. 8 a.m.-10 a.m. Tuesday.
Stroke prevention and osteoporosis screenings -- Life Line Screening offers ultrasound and bone-density screenings to gauge your risk of a stroke or osteoporosis, at various locations. A stroke prevention screening is $109, and a stroke and osteoporosis screening is $129. For locations and to register, call 800-697-9721.
Ostomy -- St. Joseph Medical Center, 7601 Osler Drive, Towson / 2 p.m.-4 p.m. Sunday. 410-337-1845.
Parkinson's disease -- Parkinson's Movement and Disorder Center, 8180 Lark Brown Road, Elkridge / 7 p.m. Monday. 410-955-8795.
Cardiac patients -- St. Agnes Hospital's Community Room A, 900 Caton Ave. / 5:30 p.m. Tuesday. 410-368-2246.
Leukemia, lymphoma -- University of Maryland Medical Center, 22 S. Greene St. / 3:30 p.m. Tuesday. 410-328-3595.
Grief and loss -- Franklin Square Hospital Center's Crawford Conference Center, 9000 Franklin Square Drive / 6:30 p.m.-8 p.m. Tuesday. 443-777-7831.
Prostate cancer -- HopeWell Cancer Support, 10628 Falls Road, Brooklandville / 7 p.m.-8:30 p.m. Tuesday. 410-832-2719.
Crohns and colitis -- Howard County General Hospital Wellness Center, 11055 Little Patuxent Parkway, Columbia / 7 p.m.-8:30 p.m. Tuesday. 410-825-5199.
Parkinson's disease -- Johns Hopkins Bayview Hospital Main Pavilion Building, Doctors Dining Room, 4940 Eastern Ave. / 7 p.m.-8 p.m. Thursday. 410-955-8795.
Hearing loss -- Hearing and Speech Agency, 5900 Metro Drive / 6:30 p.m. Thursday. 410-318-6780.
For calendar listings, e-mail releases four weeks in advance to email@example.com or mail typed news releases to Health Calendar, Features, The Sun, 501 N. Calvert St., Baltimore 21278.