Chap 3_ Spine.txt
Card Set Information
Chap 3_ Spine.txt
What does the spine consist of?
Supporting skeletal structure
What is the Vertebral Column?
hollow skeletal tube made of vertebrae
provides skeletal support
permits movement of the head
maintains the shape of the thoracic cage
supports the upper body
forms the posterior aspect of the pelvis
protects the spinal cord
What is a vertebrae?
33 bones making up the vertebral column
singular is vertebra
What is the vertebral body?
short column of bone that forms the weight-bearing portion of the vertebra
cylinder of skeletal tissue made up of cancellours bone surrounded by a layer of hard compact bone
What is the spinal canal?
Opening in the vertebrae that accomodates the spinal cord
What are the pedicles?
thick bony struts that connect the vertebral bodies w/ the spinous & transverse processes
help make up the opening of the spinal canal
What are the laminae?
Posterior bones of a vertebra
Help make up the opening of the spinal canal
What is the transverse process?
bony outgrowth of the vertebral pedicule
serves as a site for muscle attachment
articulation for the ribs
What is the spinous process?
prominence at the posterior part of a vertebra
What are intervertebral disks?
cartilaginous pad b/t vertebrae
serves as a shock absorber
limits bone wear
makeup 25% of total length of spinal column
Image of the Vertebrae
What are the divisions of the vertebral column?
Image of the vertebral column divisions
The Cervical Spine
consists of '7' vertebrae
sole skeletal support of the head
is called the atlas & permits nodding
is called the axis & permits twisting/turning
is last cervical vertebrae & can be palpated
The Thoracic Spine
consists of '12' vertebrae
ribs are connected to those vertebra
The Lumbar Spine
consists of '5' vertebrae
carry the weight of the head. neck & thorax
bear the forces of bending & lifting
The Sacral Spine
consists of '5' vertebral
attaches the pelvis & lower extremities to the skeleton
upper body balances on the sacrum
The Coccygeal Spine
consists of '3-5' fused vertebrae
residual elements of a tail
What are the Spinal Meninges?
membranes that surround & protect brain & spinal cord
consists of dura mater, the arachnoid, the pia mater