The cervical and lumbar curvatures are called secondary because they develop after birth when the baby learns to lift its head (cervical curvature) and learns to walk (lumbar curvature).
What is the secondary curvature of the spine?
Secondary curves are concave posteriorly, opposite in direction to the original fetal curvature. The cervical curve of the neck region develops as the infant begins to hold their head upright when sitting. Later, as the child begins to stand and then to walk, the lumbar curve of the lower back develops.
Which regions of the spine are considered to be secondary curvatures?
The vertebral column is curved, with two primary curvatures (thoracic and sacrococcygeal curves) and two secondary curvatures (cervical and lumbar curves).
Which curvatures are considered your primary curvatures?
The thoracic and sacral (pelvic) curves are termed primary curvatures, because they alone are present during fetal life. This definition incorporates text from a public domain edition of Gray’s Anatomy (20th U.S. edition of Gray’s Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).
Why are the curves of the spine referred to as primary and secondary?
Primary and Secondary Curves
The thoracic and sacral curvatures are termed primary curves because they are present in the fetus and remain the same in the adult. As the child grows, lifts the head, and begins to assume an upright position, the secondary curves (cervical and lumbar) develop.
What are the three main parts of a typical vertebra?
A typical vertebra will consist of a body, a vertebral arch, and seven processes (Figure 7.23). The body is the anterior portion of each vertebra and is the part that supports the body weight.
At what age do secondary curvatures develop?
The cervical and lumbar curves are compensatory or secondary curvatures, and are developed after birth, the former when the child is able to hold up its head (at three or four months), and to sit upright (at nine months), the latter at twelve or eighteen months, when the child begins to walk.
What conditions do secondary curvatures develop?
The “secondary” curvatures, the compensatory curvatures, occur with normal development. (Normal development is the condition under which they occur) These are the cervical curvature, which develops first with infant head lifting and the lumbar curvature, which develops next sitting up.
Which vertebral curvature abnormality is the most serious?
Which vertebral curvature abnormality is the most serious? Why? Answer: Scoliosis is the most serious abnormality, due to the pressure that can be placed on the lungs and resulting breathing difﬁculties. Lordosis affects the thoracic vertebrae.
What pathological bend of the spinal column do you know what its formation is associated with?
Kyphosis, commonly called roundback, humpback, or hunchback, is an increased curvature of the thoracic (upper) vertebral column; it may be caused by congenital malformation of the vertebral column, by the development of wedge-shaped vertebrae during adolescence (Scheuermann disease), or by other conditions such as …