Spine, Joints, Limbs Flashcards
Spine, joints and limbs
How many spinal curves are there?
4
Spine, joints and limbs
What are the spinal curves, from the top down?
Cervival curviture
Thoracic curviture
Lumber curviture
Pelvic curviture
Spine, joints and limbs
What are the types of vertebrae?
Carvical vertebrae
Thoracic vertebrae
Lumber vertebrae
Spine, joints and limbs
How many cervical vertebrae are there?
7
Spine, joints and limbs
How many thoracic vertebrae are there?
12
Spine, joints and limbs
How many lumber vertebrae are there?
5
Spine, joints and limbs
What makes up the thoracic cage?
Sternum
Vertebrae
Costal cartilages
Ribs

Spine, joints and limbs
How many ribs are there?
12
Spine, joints and limbs
How many real ribs are there?
7
Spine, joints and limbs
Why are the false ribs called the false ribs
Because the first 3 join to the 7th rib rather than the sternum
The last two are the floating ribs and don’t join to anything
Spine, joints and limbs
What connects the ribs to the sternum?
Costal cartilage
Spine, joints and limbs
Typical structure of a vertebrae

Spine, joints and limbs
Cervical vertebrae function
Support skull
Stabalise relative positions of brain and spinal cord
Allow controlled head movement
Spine, joints and limbs
Thoracic vertebrae function
Support weight of head, neck upper limbs and chest
Articulate with ribs to allow changes in volume of thoracic cage
Spine, joints and limbs
Function of lumber vertebrae
Support weight of head, neck, upper limbs and trunk
Spine, joints and limbs
Intervertebal discs
Sits between vertebrae

Spine, joints and limbs
Components of the intervertebal discs
Anulus fibrosus
Nucleus pulposus
Spine, joints and limbs
Anulus fibrosus
Part of intervertebal discs
Outer layer of fibrocartilage
Connects vertebral bodies in a fibrocartilaginous joint

Spine, joints and limbs
Nucleus pulposus
Components of intervertebla discs
80-90% water
Acts as a shock absorber

Spine, joints and limbs
Facet joints
Superior articular facets of one vertebrae joins the inferior facets of the one above
Synovial gliding joint
Surrounded by joint capsule and small capsular ligaments
Spine, joints and limbs
What parts of the body does the cervical nerve distribution cover?
Neck
Arms
Spine, joints and limbs
What parts of the body does the thoracic nerve distribution cover?
The trunk area
Spine, joints and limbs
What parts of the body does the lumber nerve distribution cover?
Waist down
Spine, joints and limbs
What attaches to the vertebrae to help give extra support and strength to the spine?
Strong ligaments
Spine, joints and limbs
What use are the strong ligaments that attach to the vertebrae?
Give extra support and strength tp the spine
Spine, joints and limbs
Spinal canal
The space in the vertebrae through which the spinal cord passes
Spine, joints and limbs
What does the meninges divide the spinal canal into?
Epidural space
Subarachnoid space

Spine, joints and limbs
Epidural space
Between the dura mater and the sides of the vertebral canal

Spine, joints and limbs
What things are contained in the epidural space?
Loose fatty tissue
The internal vertebral venous plexuses
Lymphatics
Spinal nerve roots
Spine, joints and limbs
The subarachnoid space
Between pai mater and the arachnoic membrane in spinal canal
Filled with cerebrospinal fluid

Spine, joints and limbs
What things are contained in the subarachnoid space?
Spine, joints and limbs
Prolapsed disk
When the nucleus of the disk herniates
Usually occurs in cervical or lumber region
Can put pressure on spinal nerve causing severe lower back pain
Spine, joints and limbs
Cervical spondylosis
Degenerative osteoarthiritis of the joints between the centre of the spinal vertebrae and/or neural foramina
Spine, joints and limbs
Tuberculosis Spondylitis
Form of extrapulmonary tuberculosis that affects the spine
Effects sometimes described as being sort of arthritis for the vertebrae
Begins in thoracic section of spine
Spine, joints and limbs
Spina bifida
Birth defect
Involves the incomplete development of the spinal cord or it’s coverings
Spine, joints and limbs
How many joints in the skull?
86
Spine, joints and limbs
How many joints in the throat?
6
Spine, joints and limbs
How many joints are there in the thorax
66
Spine, joints and limbs
How many joints are there in the spine and pelvis joints?
76
Spine, joints and limbs
How many joints are there in the upper limbs?
32 on each side
64 in total
Spine, joints and limbs
How many joints are there in the lower limbs?
31 in each
62 in total
Spine, joints and limbs
Firbous joints
Immovable
Connect bones
Spine, joints and limbs
Example of fibrous joints
Skull
Pelvis
Spine, joints and limbs
Cartilaginous joints
Slightly moveable
Bones attached to cartilage
A little movement
Spine, joints and limbs
Examples of cartilagenous joints
Spine
Ribs
Spine, joints and limbs
Synovial joints
Freely moveable
Cavitites between bones are filled with synovial fluid

Spine, joints and limbs
Role of synovial fluid
Lubricates and protects the bones in synavial joints
Spine, joints and limbs
What influences joint stability?
Articular surfaces
Ligaments
Muscle tone
Spine, joints and limbs
How does articular surfaces aid joint stability?
Plays minor role
Some deep sockets or grooves aid stability
Spine, joints and limbs
How do ligaments aid joint stability?
The more ligaments, the stronger the joint
Spine, joints and limbs
How far can ligaments stretch before they tear?
6%
Spine, joints and limbs
How does muscle tone aid stability in joints?
Provide a constant, low level contractile force
Keeps tension on the ligaments
Especially important at shoulders, knees and arches of foot
Spine, joints and limbs
Types of synovial joints
Ball and socket
Hinge
Pivot
Gliding (plain)
Saddle
Condyloid
Spine, joints and limbs
Which synovial joint provides the greatest range of movement?
Ball and socket joint
Spine, joints and limbs
What holds the ball and socket joint together?
Ligaments and tendons
Spine, joints and limbs
Hinge joints
Made by joining two bone ends which have smooth surfaces
Allows flexion and extension
Only a small amount of rotation allowed
Spine, joints and limbs
Where would you find a pivot joint?
Top of the spinal column, between axis and atlas bones of the neck
Spine, joints and limbs
Pivot joint
Only allows rotation
One bone acts as a “peg” which fits into the “ring” formed by the other bone

Spine, joints and limbs
Gliding joints
Allow flexion and extension through a slight gliding motion between the ends of small bones
Linked by strong ligaments to stop them moving too far

Spine, joints and limbs
Saddle joints
Occur where concave and convex surfaces meet
Allows movement forwards, backwards and right to left
Spine, joints and limbs
Condyloid joints
Convex shape of one joint fits in the concave shape of another joint
Allows movement in all directions
Spine, joints and limbs
Example of a saddle joint
The thumb
Spine, joints and limbs
Example of condyloid joint
The wrist