Anatomy Of The Spine

These restrict the range of movement possible, and are joined by a thin portion of the neural arch called the pars interarticularis. Main article: The primary curves thoracic and sacral curvatures form during fetal development.

In sauropod dinosaurs, the largest known land vertebrates, pleurocoels and air sacs may have reduced the animal's weight by over a ton in some instances, a handy evolutionary adaption in animals that grew to over 30 metres in length.

Each vertebra is separated by intervertebral discs which are flexible cartilage discs. Vertebral column of a goat. FaceBook Tweet Email Page.

Human Spine and Spinal Cord Picture C1 - S5 Vertebra - Disabled World

The number of vertebrae in the spines of reptiles is highly variable, and may be several hundred in some species of snake. The anterior aspect of the upper thoracic spine is a difficult region to approach in spinal surgery.

The dorsal vertebrae range from the bottom of the neck to the top of the pelvis. T8 T8 vertebra is toward the lower caudal end of the twelve 12 thoracic vertebrae within the central, torso section of the spine.

Test Your Knowledge - Bones

Even these patterns are only generalisations, however, and there may be variation in form of the vertebrae along the length of the spine even within a single species. This is why exercise throughout life is crucial to spinal and skeletal health. Retrieved 25 July A person with a T11 vertebral injury may have or recover sensations in the L1 through L4 dermatomes which include the front of the leg down to the mid-shin level.

Gray's Anatomy.

Wikimedia Commons has media related to Vertebral column. Paralysis in arms, hands, trunk and legs. What is in the centre of a bone? Two transverse processes and one spinous process are posterior to behind the vertebral body.

The vertebrae of lobe-finned fishes consist of three discrete bony elements. Ability to speak is sometimes impaired or reduced. The general structure of vertebrae in other animals is largely the same as in humans.

Vertebral column - Wikipedia

Vertebrae in these regions are essentially alike, with minor variation. Leave this empty: Amphicoelous vertebra have centra with both ends concave. A Bone meet at joints, but there are several types. Arm and hand function is usually fairly normal.

Some unusual variations include the saddle-shaped sockets between the cervical vertebrae of birds and the presence of a narrow hollow canal running down the centre of the vertebral bodies of geckos and tuataras , containing a remnant of the notochord.

The most common thoracic spinal cord injury involves T11 and T