In the Igbo culture, masks are used in almost all of the ceremonies and are essential to the understanding of the holiday. Also, both cultures have holidays that celebrate ancestors and family. Such as the american Fathers day, and the Igbo celebration of ancestors.
Bending forward or rounding your lower back is called flexion. Flexion in the lumbar spine is primarily limited by compression of the intervertebral disks and tension in the ligaments that run along the back of the spine. The normal range of movement of lumbar flexion is 40 to 50 degrees.he range of motion, or how far your spine can move, is limited by the disks between the vertebrae, the ligaments that tie the vertebrae together and the orientation of the facet joints on the back part of the vertebrae.
Full range of motion is described as being within normal limits, or WNL. Normal ROM for back flexion is 90 degrees, or bending forward to touch your feet.As with most movements, this type of flexion works in tandem with other joints, including pelvic rotation, so any limitation could arise from back or pelvis issues.ormal extension ROM in your back is limited to only 25 degrees. This range is similar to moving your trunk from the 12 o'clock position when standing upright to in between the 10 o'clock and 11 o'clock position when extended.