Postural sway and perception of the upright stance stability borders.
Decline in the perception of the borders of postural stability due to increase in sway was evaluated in young and elderly subjects. Ranges of lateral and anteroposterior postural sway were measured in eleven young and eleven elderly subjects during maximum voluntary excursions of center of gravity while leaning forward, backward, left, and right. In both age groups, displacement of the center of gravity out of the reference position resulted in increases in the range of sway in the plane corresponding to the direction of lean. Young subjects who further displaced their center of gravity within the base of support also exhibited significantly elevated anteroposterior sway range while leaning forward and backward, both in eyes-closed and in eyes-open experimental conditions.Four suicide bombers attacked a market and town on Monday in Cameroon's Far North region near the border with Nigeria, killing at least 28 people and wounding 65 others, local officials say.

Two attackers targeted the market in Bodo, and two others detonated explosives in town, said the region's Gov. Midjiyawa Bakari. The wounded have been taken to hospitals in Kousseri, he said.

"We have information the four bombers came from Nigeria. We are investigating where they spent the night before attacking the market," said Bakari.

A Cameroon troop commander, Gen. Jacob Kodji, confirmed the attack and said Nigeria's Islamic extremist group Boko Haram is suspected. He said some accomplices may still be in hiding.



"We have deployed soldiers to the area to assist the local defence group because we are informed