However, the optimal spine curvatures are between 30 - 35 degrees for the lumbar lordosis and the same for
the thoracic kyphosis and cervical lordosis (Chek 2001).
As the heavy head slowly drops forward and down, the scapulae externally rotate and protract, increasing
thoracic kyphosis and flattening of lumbar lordosis.
Not exact matches
A healthy spine has neutral curves in the sagittal plane that offset each other, called
kyphosis in the
thoracic spine or lordosis in the lumbar area.
«In addition, you can either develop a less convex curve in the
thoracic spine (flat spine) or have too much of a convex curve, which is called
kyphosis.»
Furthermore, perpetually poor sitting posture can trigger an excessive (functional)
kyphosis (forward curvature) of
thoracic spine.
In upper crossed syndrome, tightness in the pectoral muscles and latissimus dorsi and weakness in the rhomboids and middle / lower trapezius result in an exaggerated
kyphosis of the
thoracic spine and a depressed position of the sternum (1,2).
The spine has natural curves — the
thoracic backwards with
kyphosis and the lumbar forward with lordosis.
This will draw the shoulders forward, causing
kyphosis, which will limit
thoracic rotation.
The
thoracic spine and sacrum have a
kyphosis, or backward convex curve.