The body is the anterior portion of each vertebra and is the part that supports the body weight. Because of this, the vertebral bodies progressively increase in size and thickness going down the vertebral column. The bodies of adjacent vertebrae are separated and strongly united by an intervertebral disc.
Why do vertebrae increase in size?
The size of the vertebral body increases from L1 to L5, indicative of the increasing loads that each lower lumbar vertebra absorbs.
Where do vertebrae increase in size?
Human vertebrae increase in size from the neck to the lower back due to increased weight bearing. Spinous processes show little variation in length, are often bifurcated in cervical vertebrae, and tend to be sharp and point inferiorly in thoracic vertebrae.
What is the functional purpose of the vertebrae increasing in size from the cervical region down to the lumbar region?
Why does vertebral size change from the cervical region down through he lumbar region? -This serves as a functional purpose, since when the body is in an upright position, each vertebra must support the weight of not only the arms and head but all the trunk positioned above it.
What are the 5 areas of the spine?
The spine is composed of 33 bones, called vertebrae, divided into five sections: the cervical, thoracic, and lumbar spine sections, and the sacrum and coccyx bones. The cervical section of the spine is made up of the top seven vertebrae in the spine, C1 to C7, and is connected to the base of the skull.
What are the symptoms of L5 nerve damage?
L5 NERVE ROOT DAMAGE
A pinched L5 nerve root usually results in radiating pain in the foot. This pain can come in the form of numbness, tingling, weakness and shooting and is commonly felt in the big toe, inside of the foot, top of the foot and ankle.
Why are the vertebrae different sizes and shapes?
The size and shape of each lumbar vertebra is designed to carry most of the body’s weight. Each structural element of a lumbar vertebra is bigger, wider and broader than similar components in the cervical and thoracic regions.
Which vertebrae does not have a body?
The atlas is the first cervical vertebra – the one that sits between the skull and the rest of spine. The atlas does not have a vertebral body, but does have a thick forward (anterior) arch and a thin back (posterior) arch, with two prominent sideways masses.
What are the 4 types of vertebrae?
Vertebrae are the 33 individual bones that interlock with each other to form the spinal column. The vertebrae are numbered and divided into regions: cervical, thoracic, lumbar, sacrum, and coccyx (Fig. 2). Only the top 24 bones are moveable; the vertebrae of the sacrum and coccyx are fused.
What two spinal curvatures are obvious at birth?
Which two spinal curvatures are observed at birth? The two primary curvatures that we’re born with are the concave forward curvatures in the thoracic and sacral spines.
Why are lumbar vertebrae so large what is its physiological significance?
Structure and Function
The lumbar vertebrae have the largest bodies of the entire spine and an increase in size as the spine descends. This marked increase in size is a reflection of the responsibility of the lumbar spine of supporting the entire upper body.