Pedal across the Golden Gate Bridge on this scenic San Francisco bike tour, a family-friendly adventure bringing you up close to the cityâs most famous ... Read more. Location: San Francisco, California. Duration: Tour lasts between 2.5 and 3 hours; bike rental valid for 24 hours.
posterior median fissure. 1. a shallow vertical groove in the closed part of the medulla oblongata, continuous with the posterior median fissure of the spinal cord. 2. a shallow vertical groove dividing the spinal cord throughout its length in the midline posteriorly; called also posterior median sulcus.
In most people the fissure heals within 1-2 weeks or so, just like any other small cut of the skin. Some fissures take longer to heal. A fissure that lasts more than six weeks is called a chronic anal fissure (chronic means persistent). This is uncommon, but treatment can still be effective.