Flashcards in Chapter 2- The Back Deck (196)
Consists of the posterior aspect of the body and provides the musculoskeletal acid of support for the body
What are the parts of the back?
-proximal elements of ribs
-superior aspects of pelvis
-posterior regions of base of skull
-various interconnecting muscles
-proximal parts of spinal nerves
What are the functions of the back?
-carry and position head
-brace and help maneuver limbs
What are the curvatures of the vertebral column?
Concave anteriorly; reflects original embryonic shape
Concave posteriorly in cervical and lumbar regions; brings center of gravity into vertical line
What controls the movement of the back?
The extrinsic and intrinsic muscles
Move the limbs and ribs
Maintain posture and move the vertebral column: extension, flexion, lateral flexion, rotating
How restricted/unrestricted is movement of the back?
Movement between any 2 vertebrae is limited but effects between vertebrae are additive along the entire length of the vertebral column
Contains the spinal cord and proximal parts of the spinal nerves
The vertebral column
How many bones are in the vertebral column and what are the different regions?
Major bones = 33 vertebrae
The sacral vertebrae are fused into 1 called the.....
Coccygeal vertebrae are rudimentary and are often fused into a single.....
Consists of body and arch
What are vertebrae separated by?
Fibrocartilaginous intervertebral discs
Provides attachments for muscles and ligaments, levers of muscle actions, and sites of articulation for adjacent vertebrae
What are the other parts of typical vertebrae?
-superior and inferior articular facets
-superficial and intermediate group
-move the upper limb and thoracic wall
-intermediate group helps you breathe in and out
-innervated by anterior rami of spinal nerves
-have embryonic origins outside of the back
-develop from hypaxial muscles
-deep group; deep in position
-innervated by the posterior rami of spinal nerves
-move the head and vertebral column; helps you straighten out
-have embryonic origins in the back
-develop from epaxial muscles
Consists of vertebral bodies, intervertebral discs, and ligaments
Anterior walk of the vertebral column
Consists of vertebral arches and ligaments
Lateral walls and roof of the vertebral column
What are the 3 meninges that the spinal cord is covered by?
Outermost and thickest meninges
Middle layer meninges
Inner most meninges
Intimately associated with the spinal cord
How many spinal nerves are there and where do they emerge from?
31 pairs in segmental distribution
Emerge from the vertebral canal between Pericles of adjacent vertebrae
What are the different regions of spinal nerves?
-8 cervical (C1-C8)
-12 thoracic (t1-t12)
-5 lumbar (L1-L5)
-5 sacral (S1-S5)
-1 coccygeal (Co)
How do the spinal nerves attach to the spinal cord?
Via anterior and posterior root