What is the name of the cranial most vertebra?

The CCJ includes the occiput and the two most cephalad cervical vertebrae known as the atlas (C1) and the axis (C2).

How many cranial vertebrae are there?

The seven cervical vertebrae are numbered C1 to C7. The neck has the greatest range of motion because of two specialized vertebrae that connect to the skull. The first vertebra (C1) is the ring-shaped atlas that connects directly to the skull.

What are the vertebra from cranial to caudal?

The vertebral column extends from the skull to the end of the tail. There are five regions: cervical, thoracic, lumbar, sacral, and coccygeal (caudal). The typical formula for the horse is C7, T18, L6, S5, Cy15-21.

What are cervical vertebrae?

The cervical spine (neck region) consists of seven bones (C1-C7 vertebrae), which are separated from one another by intervertebral discs. These discs allow the spine to move freely and act as shock absorbers during activity.

What are the 33 vertebrae?

Vertebral Column and Spinal Cord The vertebral column (VC) is composed of 33 vertebrae [cervical (C), 7; thoracic (T), 5; lumbar (L), 5; sacral (S), 5; coccygeal, 4], which are interconnected by intervertebral (IV) disks (except C1, C2) and stabilized by spinal ligaments.

What are the 3 main parts of a vertebra?

The normal anatomy of the spine is usually described by dividing up the spine into three major sections: the cervical, the thoracic, and the lumbar spine. (Below the lumbar spine is a bone called the sacrum, which is part of the pelvis). Each section is made up of individual bones, called vertebrae.

What are the 5 types of vertebrae?

As mentioned above, our vertebrae are numbered and divided into five regions: cervical, thoracic, lumbar, sacrum, and coccyx.

What are the 26 vertebrae?

The spine, also known as the vertebral column or spinal column, is a column of 26 bones in an adult body 24 separate vertebrae interspaced with cartilage, and then additionally the sacrum and coccyx.

What is the vertebra?

Vertebrae: The spine has 33 stacked vertebrae (small bones) that form the spinal canal. The spinal canal is a tunnel that houses the spinal cord and nerves, protecting them from injury. Most vertebrae move to allow for a range of motion. The lowest vertebrae (sacrum and coccyx) are fused together and don’t move.

What is formula of vertebral column?

Vertebral formula is a formula indicating the number of vertebrae in each segment of the spinal column. For humans it is C7, T12, L5, S7, Co4 which is equal to 33.

What’s a vertebral column?

(ver-TEE-brul KAH-lum) The bones, muscles, tendons, and other tissues that reach from the base of the skull to the tailbone. The vertebral column encloses the spinal cord and the fluid surrounding the spinal cord. Also called backbone, spinal column, and spine.

What is cranial and caudal direction?

Cranial/Caudal: Cranial — directed toward the cranium (brain case) [neck, trunk, tail, limbs]. Caudal — directed toward the tail (& beyond) [head, neck, trunk, tail, limbs].

Where is C6 and C7?

cervical spine The C6 C7 spinal motion segment is located in the lower part of the cervical spine and consists of the C6 and C7 vertebrae, and the anatomical structures connecting them. This segment helps provide neck flexibility, supports the cervical spine and head, and protects the spinal cord and nerve pathways.

Where is C5 and C6?

The C5-C6 spinal motion segment (located in the lower cervical spine just above the C7 vertebra) provides flexibility and support to much of the neck and the head above.

What is C3 and C4 in neck?

The C3 spinal nerve dermatome typically includes the skin over parts of the upper neck. The C3 myotome commonly includes certain neck muscles that help bend the neck forward. The C4 spinal nerve dermatome usually includes parts of skin over the shoulder.

What does T11 and T12 control?

They are called T11 and T12. … Your lowest 2 ribs are attached to these vertebrae. The areas of the body and functions of the body controlled by the nerves exiting these vertebrae control: Kidneys, Ureters, Small Intestines, Colon, Uterus, Lymph Circulation, and the Buttocks.

What is Flavum?

The ligamenta flavum is a short but thick ligament that connects the laminae of adjacent vertebrae from C2 to S1 and is considered a medial ward continuation of the fact joint . It consists of 80% elastin fibers and 20% collagen fibers.

Where is the 7th vertebrae?

The 7th cervical (C7) vertebra is the largest and most inferior vertebra in the neck region. Unlike the other cervical vertebrae, the C7 has a large spinous process that protrudes posteriorly toward the skin at the back of the neck.

What are the 4 parts of a typical vertebra?

A typical vertebra consists of a body and a vertebral arch. The arch is formed by the paired pedicles and paired laminae. Arising from the vertebral arch are the transverse, spinous, superior articular, and inferior articular processes. The vertebral foramen provides for passage of the spinal cord.

What are the 4 main functions of the spine?

Understanding Spinal Anatomy: Overview of the Spine

What is spiral cord?

The spinal cord is a long bundle of nerves and cells that extends from the lower portion of the brain to the lower back. It carries signals between the brain and the rest of the body. This article covers the key anatomy of the spinal cord and its functions. It also provides some information about spinal cord injuries.

What is atlas and Axis?

The atlas and axis vertebrae are the two most superior bones in the vertebral column, and they are part of the seven cervical vertebrae. The atlas is the top-most bone, sitting just below the skull; it is followed by the axis. Together, they support the skull, facilitate neck movement, and protect the spinal cord.

What are the 2 types of vertebrae?

There are 4 different types of vertebrae:

What are the types of vertebra?

The vertebrae of the spinal column are divided into five regions: cervical, thoracic, lumbar, sacral, and coccyx.

Are there 26 or 33 vertebrae?

The spine is made up of 33 vertebrae. More than 13 million neurons are found in the spine. Adults only have 26 vertebrae because bones fuse together as we age.

What is the last vertebrae called?

The last lumbar vertebra in your lower back meets the sacrum. Below the sacrum or sacral spine is the coccyx, your tailbone. Photo Source: Shutterstock. These bones are indeed made for walking, running, sitting, and lifting.

Do all mammals have 7 vertebrae?

Nearly all mammals have the same number of cervical vertebrae, no matter how long or short their necks arehumans, giraffes, mice, whales, and platypuses all have exactly seven cervical vertebrae, explains co-author Jeff Spear, an NYU doctoral student.

What is vertebra and vertebrae?

Vertebrae are the 33 individual, interlocking bones that form the spinal column. Each vertebra has three main functional components: the vertebral body for load-bearing, the vertebral arch to protect the spinal cord, and transverse processes for ligament attachment.

What’s the difference between vertebrae and vertebra?

What is the difference between Vertebra and Vertebrae? Vertebra is a single bone while vertebrae are the collection of all those vertebral bones together. In other words, one vertebra is the basic building unit of the vertebrae or the backbone. Vertebra is very small compared to vertebrae.

What are the 3 main functions of the spinal cord?

What does the spinal cord do?