The spine is a structure which is very important for human beings then we need to know. The very first step to understanding the numerous causes of low back discomfort is understanding about the regular style (anatomy) of the tissues of this area. Crucial structures of the low back that may be related to symptoms there consist of the bony lumbar spine (vertebrae, singular = vertebra), discs among the vertebrae, ligaments about the spine and discs, spinal cord and nerves, muscles of the low back, internal organs of the pelvis and abdomen, along with the skin covering the lumbar region.
The bony lumbar spine is designed so that vertebrae "stacked" together can provide a movable support structure even though also protecting the spinal cord from injury. The spinal cord is composed of nervous tissue that extends down the spinal column from the brain. Each and every vertebra has a spinous procedure, a bony prominence behind the spinal cord, which shields the cord's nervous tissue from impact trauma. Vertebrae also have a strong bony "body" (vertebral body) in front of the spinal cord to present a platform suitable for weight bearing of all tissues above the buttocks. The lumbar vertebrae stack right away atop the sacrum bone that's situated in among the buttocks. On every side, the sacrum meets the iliac bone of the pelvis to form the sacroiliac joint of the buttocks.
The discs are pads that serve as "cushions" among the individual vertebral bodies. They help to minimize the impact of anxiety forces on the spinal column. Every disc is designed like a jelly donut with a central softer component (nucleus pulposus) and a surrounding outer ring (annulus fibrosus). The central portion of the disc is capable of rupturing (herniating) by way of the outer ring, causing irritation of adjacent nervous tissue and sciatica as described below.
Ligaments are strong fibrous soft tissues that firmly attach bones to bones. Ligaments attach each and every of the vertebrae to each other and surround each and every of the discs.
The nerves that supply sensation and stimulate the muscles of the low back as well as the lower extremities (the thighs, legs, feet, and toes) exit the lumbar spinal column via bony portals, every single of which is called a "foramen."
A lot of muscle groups which are responsible for flexing, extending, and rotating the waist, also as moving the lower extremities, attach to the lumbar spine through tendon insertions.
The aorta and blood vessels that transport blood to and from the lower extremities pass in front of the lumbar spine in the abdomen and pelvis. Surrounding these blood vessels are lymph nodes (lymph glands) and tissues of the involuntary nervous program that are important in maintaining bladder and bowel control.
The uterus and ovaries are essential pelvic structures in front of the pelvic area of females. The prostate gland is a considerable pelvic structure in men. The kidneys are on either side of the back of the lower abdomen, in front of the lumbar spine.
The skin over the lumbar location is supplied by nerves that come from nerve roots that exit from the lumbar spine.
0 komentar:
Posting Komentar