Axial Skeletal System Anatomy
Card Set Information
Axial Skeletal System Anatomy
anatomy skeletal system bones joints tissue axial
Basic anatomy of the axial skeletal system. Includes bones and other information
What is the Axial Skeleton?
Forms the longitudinal axis of the body;
Supports and protects organ systems;
Provides surface area for the attachment of muscles
Bones in the axial skeleton
Bones in the skull
29 total bones;
serves as orienting landmark for palpating the carotid artery to assess pulse
Bones in the spine
Adult vertebral column
How many and what kinds of vertebrae make up the spine?
33 total vertebrae
4 coccygeal vertebrae fused to form one bone that lies below the sacrum
7 vertebrae of the neck
12 vertebrae of the midback
5 vertebrae of the lower back
5 sacral vertebrae fused to make one bone that acts as trasition pointbetween the spine and pelvis.
Round, flat, platelike structures composed of fibrocartilaginous tissue
unite the vertebral bodies
- serve to
Parts of the Intervertebral disk
outer, fibrocartilaginous portion of the intervertebral disk
inner gelatinous portion of the intervertebral disk
What is the Adult vertebral column?
The 4 major curvatures of the adult spine in the sagittal plane
What are the 4 curve types of the normal adult vertebral column?
Kyphosis curve and examples
Convexity of the curve is posteriorily directed
- two primary curves of vertebral column (thoracic curve and sacral curve)
Primary curve and examples
Vertebral column curve that contains the same directional curvature as the spine in the fetus
- Thoracic curve
- Sacral curve
Lordosis Curve and examples
Convexity of the curve is anteriorly directed
- 2 secondary curves of the vertebral column (cervical and lumbar)
Secondary curve and examples
Curves of vertebral column that develop after birth as infant progresses in weight and bearing
- Cervical curve
- Lumbar curve
Abnormal curves in sagittal plane
exaggerated posterior thoracic curvature (hunchback)
Exaggerated anterior lumbar curvature
Abnormal curve in the frontal plane
Scoliosis - lateral deviation in the frontal plane
How many paris of ribs does the body have and what kinds?
12 pairs of ribs.
- 7 pairs of true ribs
- 5 pairs of false ribs
7 most superior ribs that attach directly to the sternum with costal cartilage
5 inferior pairs of ribs that do not attach directly with the sternum
- top 3 indirectly attach via costal cartilage of adjacent superior ribs
- bottom 2 are floating
Intercostal spaces and function
Spaces between the ribs
- Palpation of the intercostal spaces of the true ribs is important for correct ECG electrode placement
What is the Sternum and it's parts?
Sternum lies in the midline of the chest
- Manubrium (superior)
- Body (middle)
- Xophoid process (inferior)
Slightly raised surface landmark where manubrium meets of the body of the sternum.
Xiphoid Process and function
Surface landmark situated at the bottom of the sternum and in the middle of the inferior border of the rib cage
- Palpation of the xiphoid is necessary for CPR
Palpation of manubrium helps determine proper paddle placement in defibrillation.