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45 Cards in this Set
- Front
- Back
- 3rd side (hint)
Function of spine |
Provides the main support for body, allowing it to stand upright, bend and twist, while protecting the spinal cord from injury |
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Purpose of cervical spine |
Is too support the weight of the head |
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Function of thoracic |
Is to jold the rib cage and protect the heart and lungs. It has limited range of motion |
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Lumbars function |
Is to beat the weight if the body |
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Biggest vertebrae in the body |
Lumbar |
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3 parts of vertebra |
1. Approximately cylindrical shaped Vertebral body 2.star shaped processes 3.hollow vertebral canal |
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What's the function of 3 parts of vertebra |
Vertebral body: wistand compression Processes: for muscle attachment Vertebral canal : for spinal cord and nerves |
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What are pedicles!? |
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What does the outer ring of intervertebral disc? |
Annulus finrosus |
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What are the 3 body planes called? |
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Dorsal |
Back or posterior side of the body |
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Ventral |
Front or anterior side if the body |
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Paraplegia |
Paralysis of legs and lower body below arms indicating an injury to the thoracic or lumbar spine |
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Quadeiplegia |
Paralysis of legs and arms indicating an injury to the cervical spine |
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Non sergical treatment for scoliosis |
Monitor, bracing, casting under general anaesthetic |
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Name the Key biomechanical functions of spine |
Maintenance of trunk stability Provide mobility Aid movement in the upper and lower limbs Protection of spinal cord |
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Compressive load on spine= |
Weight +action of the posterior muscle |
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Typical so pressie load on L4, 5 during level walking |
1.5 to 3 times BW |
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Typical so pressie load on L4, 5 during standing or sitting |
1.5 to 2 times BW |
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Shear force anterior - posterior |
Up to 20% of BW |
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What is the functional spinal unit defined as |
An intervertebral Disc, the vertebrae either side and the interconnecting ligaments |
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Movements in spine |
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How many degrees in lateral flexion(left and right side bending) |
5-10° |
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Degrees in axial rotation |
3° in lower thoracic and lumbar spines |
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Paediatric spine fixers during walking and anterior-posterior shear |
1.5 to 3 during walking Upto 0.2 BW shear |
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Suqgical/engineering solutions for scoliosis |
Staples to squeeze bones together Growth guidance system Traditional growing rods(surgery every 6-9 months) Magnetic growing rods (MAGEC) |
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What does ligament do? |
Connects bone to bone. It's a tough fibrous material, provides stability and may limit motion. |
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True or false Some spinal ligaments go from vertebrae to vertebrae; some run the length of the spine |
True |
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True or false All ligaments have different strenght ( a single one can have different strenght at different points) |
True |
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Scoliosis is more common in Girls or boys? |
Girls |
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How big 8s the drive pin? |
0.8mm diameter |
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Define strengths |
Is stability to wistand an apied load without failure or plastic deformation |
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3 point bending equations |
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Trust bearing only takes axial load |
True |
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What is L10 |
Life of a millions of revolutions after which 10% of them will fail |
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L10 equation |
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In MAGEC its static load most of the time. It's dynamic when it's extending |
True |
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O ring |
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Purpose of o ring |
Prevent fluid in and out of the rod or both |
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Buckling load of extending bar |
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What class are MAGEC rods? |
Class IIb same as condoms and blood bags |
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Extension for 90 and 70 mm |
90mm is 48mm 70mm is 28mm |
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