
Dangerously low blood pressure is considered an “invisible” consequence of paralysis, adding to the woes of as many as 9 out of 10 people with spinal cord injuries. Now, a new implant has been developed that treats the problem by delivering electrical stimulation to a select group of spinal neurons. The device, called a neuroprosthetic baroflex, stimulates the lower part of the spine, which contains the most neurons involved in blood pressure control, researchers said. The findings were published April 6 as an essay in Science. Spinal cord injury often interferes with the brain’s ability to modulate blood pressure when a person changes posture, such as moving from a sitting to a standing position. This ability, called the baroreceptor reflex, involves a series of quick responses within the body to keep blood pressure in a normal range when someone abruptly changes position, the Cleveland Clinic says. The brain senses that artery walls are stretching due to a sudden increase in blood pressure. In response, the brain can order the body to compensate, though a series of reactions that take place within a couple of heartbeats. A person with a spinal cord injury can be rendered dizzy, nauseous or prone to fainting if their baroreceptor reflex fails and their blood pressure drops to very low levels as a result of trying to move. “Almost all of… read on > read on >