anatomy test 2
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2.Directionally speaking, how are vertebra numbered? (lab manual)
- Numbered from superior to inferior, C1-7, T1-12, L1-5, S1-5, Co1-4
- Adults commonly have 33 vert, arranged in 5 regions: 7 cervical, 12 thoracic, 5 lumbar, 5 fused sacral and 4 fused coccygeal. superior to inferior ex. C7 ( last cervical vertebra) is superior to T1 (first thoracic vertebra)
- superior to inferior
3. Be able to describe the difference between the primary and secondary curvatures of the vertebral column. Where do these curvatures occur? (lab manual, A&M) Which curvature is more pronounced in the male (Thoracic), Female (lab manual)?
- Primary- these curvatures develop during the fetal period (3rd to 9th month) of intrauterine development-thoracic concave anteriorly-sacral concave anteriorlysecondary- start development in utero during the latter months of gestation but complete their development after birth, these curvatures are concave posterior
- •Cervical- begins when the child starts holding their head up with out support
- •Lumbar- begins development when the child starts to walk, variations of curvatures occur between male and female
- Thoracic is more pronounced in male -The lumbar curvature is more pronounced in the female at the lumbosacaral angle (junction between L5 and S1)Also the sacral curvature has a sharper angle in females
Which curvature is more pronounced in the male (Thoracic), Female (lab manual)?
Thoracic is more pronounced in male
the lumbar curvature is more pronounced in the female at the lumbosacaral angle (junction between L5 and S1)Also the sacral curvature has a sharper angle in females
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