The Atlas is the first cervical vertebra and therefore abbreviated C1. This vertebra supports the skull. Its appearance is different from the other spinal vertebrae. The atlas is a ring of bone made up of two lateral masses joined at the front and back by the anterior arch and the posterior arch.
What is the first spine bone called?
The first vertebra (C1) is the ring-shaped atlas that connects directly to the skull. This joint allows for the nodding or “yes” motion of the head. The second vertebra (C2) is the peg-shaped axis, which has a projection called the odontoid, that the atlas pivots around.
What are your first two spinal vertebrae called?
Vertebral Bodies in the Cervical Spine
The first cervical segment (called the atlas) is a ring that does not have a vertebral body. This vertebra is named C1. The second vertebral body (called the axis), acts as a post that the first vertebral ring.
What is the D spine?
Definition. One of the three distinct portions along the spine or the vertebral column (the other two are the cervical spine and the lumbar spine), and is the longest section comprised of twelve thoracic vertebrae that house the spinal cord along the rachidian channel.
What part of your spine controls your legs?
The nerves of the cervical spine go to the upper chest and arms. The nerves in your thoracic spine go to your chest and abdomen. The nerves of the lumbar spine then reach to your legs, bowel, and bladder. These nerves coordinate and control all the body’s organs and parts, and let you control your muscles.
What are the names of the 26 vertebrae?
These regions are called the cervical spine, thoracic spine, lumbar spine, sacrum, and coccyx.
How many DL is a spine?
Spine is made up of 24 spinal bones, called as vertebra, of which, the thoracic region of the spine is made up of 12 vertebrae (T1-T12). The vertebrae are aligned on top of one another to form the spinal cord which gives the posture to our body.
Is lumbar part of spine?
The lumbar region of the spine, more commonly known as the lower back, consists of five vertebrae labeled L1 through L5. The lumbar region is situated between the thoracic, or chest, region of the spine, and the sacrum. The lumbar spine typically has a slight inward curve known as lordosis.
Where is lumbar 12?
The T12 vertebra is located in the last position of the thoracic section of the spine, and sits just above the lumbar section. The portion of the spinal cord that the thoracic vertebrae protect is known as the thoracic cord. This part of the cord controls abdominal muscles.
What part of the spine controls bowels?
The lowest part of the spinal cord is the sacral spinal cord. Bladder function, bladder and bowel external sphincters, sexual functions (including erections and ejaculation in men and responsiveness in women), and some leg muscles are the domain of the sacral spinal cord.