Atrophy of paraspinal muscles is common in low back pain (LBP). Early studies report atrophy and abnormalities of the paraspinal muscles in 20% to 60% of people with chronic LBP.More recent data suggest a reduced cross-sectional area of multifidus at L4 and/or L5 in chronic LBP.ntroduction. Atrophy of paraspinal muscles is common in low back pain (LBP). Early studies report atrophy and abnormalities of the paraspinal muscles in 20% to 60% of people with chronic LBP. More recent data suggest a reduced cross-sectional area of multifidus at L4 and/or L5 in chronic LBP.
Hyenas usually bear litters of two to four cubs, which, unlike the other two species, are born with their eyes open. Cubs begin to eat meat from kills near the den at about 5 months, but they are suckled for as long as 12 to 18 months, an unusually long time for carnivores.
1 Hyenas likely descended from small, arboreal creatures that resemble modern-day civets. 2  A civet is a long, slender, cat-like animal with an elongated muzzle. 3  The largest hyena species that ever lived, the giant hyena, was about the size of a lion and could crush elephant bones. The spotted hyena is a skillful hunter but also an opportunistic scavenger. 2  It consumes animals of various types and sizes, carrion, bones, vegetable matter and other animals' droppings. 3  The powerful jaws and digestive tract of the hyena allow it to process and obtain nutrients from skin and bones.