unit e. terminology abduction adduction appendicular skeleton axial skeleton ball and socket joint...
DESCRIPTION
Disorders and Related Terminology Arthritis Arthroscopy Closed reduction Dislocation Fractures Greenstick fracture Kyphosis Lordosis Open reduction Scoliosis Sprain Strain TractionTRANSCRIPT
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Unit E
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Terminology • Abduction • adduction • Appendicular skeleton• Axial skeleton• Ball and socket joint• Bursa• Circumduction• Compact bone• Diaphysis• Endosteum• Epiphysis• Extension• Flexion• Fontanel• Hemopoiesis
• Joint • Medullary canal• Ossification• Osteocytes• Periosteum• Pronation• Rotation• Spongy bone• Supination• Suture• Gliding joint• Hinge joint• Pivot joint• Synovial fluid
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Disorders and Related Terminology
• Arthritis• Arthroscopy• Closed
reduction• Dislocation• Fractures• Greenstick
fracture• Kyphosis• Lordosis
• Open reduction• Scoliosis• Sprain• Strain• Traction
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Skeletal System• 206 bones• Functions
1. Supports body and provides shape2. Protects internal organs3. Movement and anchorage of muscles4. Mineral storage (Calcium and
Phosphorus)5. Hemopoiesis (red marrow of the bone
is the site of blood cell formation – red marrow is in long bones, sternum and ilia).
Osteocytes - mature bone cell
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Bone Formation• Embryo skeletal starts as
osteoblasts (primitive embryonic cells) – then change to cartilage
• Fontanel – soft spot on baby’s head
• 8 weeks:– Ossification begins (mineral matter
begins to replace cartilage)– Infant bones soft because
ossification is not complete
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Sutures• The bones
enclosing the brain have large flexible fibrous joints (sutures) which allow, firstly, the head to pass through the birth canal and secondly, postnatal brain growth.
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Structure of Long Bone• Diaphysis – shaft• Epiphyses – ends• Medullary cavity – center of
shaft, filled with yellow bone marrow, which is mostly fatty cells, also cells that form white blood cells
• Endosteum- lines marrow cavity
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Structure of Long Bonecontinued
• Shaft is made of compact bone (DENSE) the ends are spongy bone (POROUS). Ends contain red marrow where red blood cells are made.
• Periosteum – tough, outside covering of bone – contains blood vessels, lymph vessels, and nerves
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Axial and Appendicular Skeleton
• Axial – skull, spinal column, ribs, sternum, hyoid(u-shaped bone in neck to which the tongue is attached)
• Appendicular – shoulder girdle, arms, pelvis, legs (126 bones total)
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Human Rib Cage
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Appendicular skeleton• Clavicle• Scapula• Humerus• Radius and
ulna• Carpals• Metacarpal
s• Phalanges• Pelvis• Femur
• Tibia and Fibula
• Patella• Tarsal
bones• Calcaneus• Metatarsal
s
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Spine – Vertebral Column• Encloses the spinal cord• Vertebrae – separated by pads of
cartilage – Intervertebral discs
• Cervical Vertebrae (7)– Atlas – 1st cervical vertebrae– Axis – 2nd cervical vertebrae
• Thoracic Vertebrae (12)• Lumbar Vertebrae (5)• Sacrum• Coccyx
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muscles
become
paralysed
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Vertebral Column
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Joints• Joints are points of contact
between 2 bones- classified according to movement:– Diarthrosis – movable – Amphiarthrosis – partially movable– Synarthrosis – immovable
• Articular cartilage – covers joint surface
• Synovial Fluid – lubricating substance in joints
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Types of Joints
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Types of Joints• Ball and socket
– Bone with ball shaped head fits into concave socket of 2nd bone. Shoulders and hips
• Hinge– Move in one direction or plane. Knees, elbows,
outer joints of fingers• Pivot
– Those with an extension rotate on a 2nd arch shaped bone. Radius and ulna, atlas and axis
• Gliding– Flat surfaces glide across each other.
Vertebrae of spine
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Articular Cartilage
• It is composed of collagen fibers and/or elastic fibers, and can supply smooth surfaces for the movement of articulating bones.
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Synovial Fluid• It’s a
boundary-layer lubrication, which reduces friction between opposing surfaces of cartilage.
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Types of Motion• Flexion• Extension• Abduction• Adduction• Circumduction• Rotation• Pronation• Supination
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FLEXION•Flexion is a
position that is made possible by the joint angle decreasing.
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Extension
A movement of a joint in which one part of the body is moved away from another.
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• AbductionA motion that pulls a structure or part away the midline of the body.
• Adduction• A motion that
pulls a structure or part towards the midline of the body
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Circumduction
•The circular or a more precise movement of a body part, such as a ball-and-socket joint or the eye.
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Rotation
•A motion that occurs when a part turns on its axis.
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Pronation• A rotation of
the forearm that moves the palm from an anterior-facing position to a posterior-facing position, or palm facing down.
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Supination• The opposite
of pronation, the rotation of the forearm so that the palm faces anteriorly, or palm facing up.
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Disorders of the Bones and Joints
• Fracture- a break• Treated by:
– Closed reduction- cast or splint applied
– Open reduction- surgical intervention with devices such as wired, metal plates or screws to hold bone in alignment (internal fixation)
– Traction- pulling force used to hold the bone in place
• Used for fractures of long bones
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Fractures• Closed or simple
– bone broken, broken ends don’t break skin• Open or compound
– broken bone pierce the skin, can lead to infection• Greenstick
– in children, bone bent and splintered but never completely separates
• Comminuted – splintered or broken into many pieces
• Spiral – bone twists, resulting in one or more breaks
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Disorders Cont.• Dislocation
– Bone displaced from proper position in joint
• Sprain – sudden or unusual motion,
ligaments torn but joint is not dislocated
• Radiology– X-rays for diagnosis evaluation of
bones
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Curvature of Spine• Kyphosis
– Hunchback• Lodosis
– Swayback• Scoliosis
– Lateral curvature
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Bone Disorders• Osteoporosis- % of those
infected are women. Mineral density of bone is reduced 35 – 65%. The loss of bone mass leaves the bone thinner, porous and more prone to fracture.
• Osteomyelitis – bone infection
• Osteosarcoma – bone cancer
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Osteoporosis Osteomyelitis
Osteosarcoma
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Dx and Rx• Arthroscopy- examination into joint
using arthroscope with fiber optic lens
• Arthroplasty- reconstruction of joint
• Microdiskectomy- operation to remove damaged Intervertebral disc through tiny incision. Bone plug is usually used to replace the damaged disc.
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Diseases of Bone• Bursitis- inflammation of a
bursa (joint sac)
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Diseases of Bone continued
• Arthritis An inflammation of one or
more joints.
• Osteoarthritis- degenerative, occurs
with aging, 80% of Americans suffer,
joints become enlarged and painful
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Rheumatoid Arthritis– A chronic, autoimmune disease- joints become
swollen and painful, joint deformities common
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Bursitis
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Rheumatoid arthritis
Osteoarthritis
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Diseases of Bones cont.• Gout-
Increase of uric acid deposited in joint cavity, mostly the great toe in men.
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Whiplash
• Trauma to the cervical vertebra
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Herniated disc Intervertebral
disc ruptures or protrudes, putting pressure on spinal nerves.
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Rickets Found in
children, caused by lack of vitamin D, bones become soft.
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Diseases of Bones Cont.• Osteomalacia – softening of
bones caused by deficiency in phosphorous or calcium
• Bone marrow aspiration – removal of marrow sample with a needle for diagnostic purposes
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Bone Marrow Aspiration
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That’s the bones of it!