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The primary curvatures, thoracic and sacral, are already formed at birth. Whereas the secondary curvatures develop in infancy. The cervical curve develops as the baby begins to hold their own head up, and the lumbar forms when the infant begins to walk.

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11y ago
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13y ago

the thoracic and sacral curves are known as the primary curvatures because they are formed during the first fetal development.

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Q: Why are the cervical and lumbar curves known as secondary curvatures?
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Under what conditions do the secondary curvatures develop?

Secondary curvatures are the curves in the spine that develop after birth (when a baby starts to hold its head up).Thoracic and sacral curvatures are the primary curvaturescervical and lumbar


What two spinal curvatures are obvious at birth?

The thoracic and sacral curves are the primary curves, as they are obvious at birth. The cervical and lumbar curves are secondary as they are modifications on the foetal position.


Is the cervical curvature considered a primary curvature?

No, the cervical curvature is considered the secondary curvature, the primary curvatures are the thoracic and sacral curvatures. The lumbar curvature is also considered the Secondary Secondary curvature (yes that's two secondarys, as in the second secondary)


Under what conditions do the secondary curvatures of the spine develop?

The following conditions are when secondary curvatures of the spine develop: Cervical - when the baby starts to hold its head up Lumbar - when the baby starts to walk


How many natural curves are there in a human back?

4 curves. two are primary curvatures, because they are present when we are born. they are 1. thoracic 2.sacral other two curves are secondary curvatures. they develop after the birth. 1. cervical , appears when a baby begins to raise its head. 2. lumber , develops when the baby begins to walk. cervical and lumber curvatures are concave in shape and thoracic and sacral curvatures convex in shape.


Are the cervical and lumbar curves convex?

yes


What is saddle back?

Lordosis an anteriorly convex curvature of the vertebral column; the normal lordoses of the cervical and lumbar regions are secondary curvatures of the vertebral column, acquired postnatally


How many spinal curves are there?

There are four curves in the spine. They are the Cervical, Thoracic, Lumbar and Pelvic curves.


What are the four major curvatures of the vertebral column and direction in which they curve?

cervical, thoracic, lumbar, and sacral curvature.


What is the overall shape of the vertebral column?

There are essentially 3 curves in the human spine: 1. Cervical lordotic curve 2. Thoracic kyphotic curve 3. Lumbar lordotic curve In summary the human spine has 2 lordotic curves and 1 kyphotic curve. If you are looking at a person sideways with their face facing towards your left, the lordotic curve is concave and the kyphotic curve is convex.


The primary curves of the vertebral column are the?

In the fetal and neonatal spine, the vertebral column curves of the cervical, thoracic, lumbar, and sacral all oriented as anterior concave curves. and are designated primary curves. To get the state legislature to adopt rules that require sequential lineups


How many curves in back bone?

There are three natural curves in the backbone. The cervical lordosis and the lumbar lordosis both curve toward the front of the body. The thoracic curve is toward the other direction.